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The Conversion of St. John: A Case Study on the Interplay of Theory and Experiment

Published online by Cambridge University Press:  26 September 2008

Klaus Hentschel
Klaus Hentschel
Affiliation:
Institut für WissenschaftsgeschichteGeorg-August Universität
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Abstract

Gravitational redshift of spectral lines as one of the three early-known experimental implications of Einstein's general theory of relativity and gravitation was intensively searched for by researchers all over the world, but around 1920 most of the contemporary evidence in the sun's Fraunhofer-spectrum conflicted with the predictions of relativity theory.

In 1923 the American astrophysicist Charles Edward St. John announced that his own solar spectroscopic data would force him to retreat from his former skepticism concerning the existence of gravitational redshift. This statement was at the time widely interpreted by scientists and journalists alike as the open confession of a rapid conversion of one of the few remaining serious scientific opponents of Einstein's theory.

This paper demonstrates that this illusion of a sudden “Gestalt switch” in St. John's evaluation of data can be dissolved by a careful step-by-step account of St. John's research practice between 1917 and 1923. After a fine-grained diachronic report of the development of St. John's interpretation of his and others' data, the second part of the paper consists in a systematic analysis of the heuristics and arguments used by St. John pro and contra gravitational redshift.

Type
The Experimental Context
Information
Science in Context , Volume 6 , Issue 1 , Spring 1993 , pp. 137 - 194
Copyright
Copyright © Cambridge University Press 1993

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References

List of References

Abbot, Charles Greeley. 1935. “Charles Edward St. John.” APJ 82: 273–83.CrossRefGoogle Scholar
Adams, Sydney, Walter. 1910. “An Investigation of the Displacement of the Spectrum Lines at the Sun's Limb,” APJ 31: 30–61 (same as C.Mt. W., no.43).CrossRefGoogle Scholar
Adams, Sydney, Walter 1915. “The Spectrum of the Companion of Sirius,” PASP 27: 236–57.CrossRefGoogle Scholar
Adams, Sydney, Walter 1925a. “The Relativity Displacement of the Spectral Lines in the Companion of Sirius,” PNAS 11: 382–87; reprinted in Obs. 48: 337–42.CrossRefGoogle ScholarPubMed
Adams, Sydney, Walter 1925c. “A Study of the Gravitational Displacement of the Spectral Lines in the Companion of Sirius.” PASP 37: 158.CrossRefGoogle Scholar
Adams, Sydney, Walter 1928. “The Past Twenty Years of Physical Astronomy.” PASP 40: 213–28.CrossRefGoogle Scholar
Adams, Sydney, Walter 1937. “Charles Edward St. John.” BMNAS 18: 285–304.Google Scholar
Adams, Sydney, Walter 1938. “George Ellery Hale.” APJ 87: 369–88.CrossRefGoogle Scholar
Adams, Sydney, Walter [1947a]1967. “Early Days at Mount Wilson.” PASP 59: 213–31, 285–304; reprinted in The Searchfor Understanding, ed. Caryl Parker, Haskins, 30 1–28. Washington: Carnegie Institution.Google Scholar
Adams, Sydney, Walter 1947c. “Some reminiscences of the Yerkes Observatory, 1898–1904.” Science 106: 196–200.CrossRefGoogle ScholarPubMed
Adams, Sydney, Walter. 1949. “The History of the International Astronomical Union.” PASP 61: 5–12.CrossRefGoogle Scholar
Adams, Sydney, Walter. 1954. “The Founding of the Mount Wilson Observatory.” PASP 66: 267–303.CrossRefGoogle Scholar
Adams, Sydney, Walter. 1955. “Early Solar Research at Mount Wilsonm.” ViA 1: 619–23.Google Scholar
Adams, W. S., and St. John, C. E. 1925. “An Attempt to Detect Water-Vapour and Oxygen Lines in the Spectrum of Mars with the Registering Microphotometer.” PASP 37: 158–59.CrossRefGoogle Scholar
Aikman, Duncan 1931. “With Einstein at Pasaden Informal Clinics on Cosmos,” NYT 8 February, sec. 9, p. 4, col. 1–5.Google Scholar
Arabatzis, Theodore. 1992. “The Discovery of the Zeeman Effect,” SHPS 23: 365–88.Google Scholar
Ayyar, Narayana, A. A.. 1915. “On the Displacement at the Sun&s Limb of Lines Sensitive to Pressure and Density.” KOB 44.Google Scholar
Babcock, Harold, Delas. 1927. “Pressure Effect of Iron-Arc Lines.,” Phys. Rev. (2) 30: 366–67 (expanded in Babcock 1928).Google Scholar
Babcock, Harold, Delas 1928. “The Effect of Pressure on the Spectrum of the Iron Arc.” APJ 67: 240–261.CrossRefGoogle Scholar
Babcock, Harold, Delas 1935. “Charles Edward St. John.” PASP 47: 115–20.CrossRefGoogle Scholar
Babcock, Harold, Delas 1938. “George Ellery Hale.” PASP 50: 156–65.CrossRefGoogle Scholar
Babcock, H. D., and St. John, C. E.. 1921. “Mount Wilson Observatory: Investigations in Progress – Solar Research.” ARDMtW, 235–48.Google Scholar
Birge, Raymond Thayer 1924. “The 3883 Cyanogen Band in the Solar Spectrum,” APJ 59:46–60.CrossRefGoogle Scholar
Von Brunn, A. 1930. “Zur Frage der ‘Rotverschiebung’.” Sterne 10: 166–71.Google Scholar
Buisson, Henri, and Charles, Febry 1909. “Comparaison des spectres du centre et du bord du soleil.” CRAS 148: 1741–44.Google Scholar
Buisson, Henri, and Charles, Febry 1910. “Mesure de petites variations de longueurs d'onde par la méthode interférentielle: Application à différents problémes de la spectroscopie solaire.” J. Phys. 9 (4):298–316. (Summarized in CRAS 148:688.)Google Scholar
Buisson, Henri, and Charles, Febry 1921. “Sur le déplacement des raies solaires sous l'action du champ de gravitation.” CRAS 172: 1020–22.Google Scholar
Burns, Keivin 1927. “Standard Solar Wave Lengths (3592–4107Å and 4761–5892Å ).” PAO 6(9): 105–50 (this is a continuation of Burns and Meggers 1926, Burns and Kiess 1927).Google Scholar
Burns, Keivin 1930. “A Comparison of Laboratory and Solar Wave Lengths.” JOSA 20: 212–24.CrossRefGoogle Scholar
Burns, K., and Kiess, C. C.. 1927. “Standard Solar Wave-Lengths (5805–7142Å), PAO 6 (8): 125–39 (this is a continuation of Burns and Meggers 1926; see also Burns 1927).Google Scholar
Burns, K., and Meggers, W. F.. 1915. “Interference Measurements of Wave Lengths in the Iron Spectrum (2851–3701Å).” BBS 12: 179–205 (= no. 251).Google Scholar
Burns, K., and Meggers, W. F.. 1926. “Standard Solar Wave-Lengths (4072–4754Å).” PAO 6(7): 105–24 (see also continuation by Burns and Walters 1929).Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W.. 1916. “Interference Measurements of Wave Lengths in the Iron Spectrum (3233–6750Å).” BBS 13: 245–72 (- no. 274).Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1909. “International Solar Research.” AAAS 12: 110–11.Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1910a. “The Effect of Pressure upon Arc Spectra. No. 3: Silver.” PTRSL A211: 33–50.Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1910b. “The Effect of Pressure upon Arc Spectra, No. 4: Gold.” PTRSL A211: 51–73.Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1911. “The Effect of Pressure upon Arc Spectra, No. 3: Silver, No.4: Gold.” PRSL A84: 118–23. (This is a summary of Duffield 1910a and 1910b).Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1915a. “The Effect of Pressure upon Arc Spectra, No. 5: Nickel,” PTRSL A215: 205–52.Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1915b. “A Comparison of the Arc and Spark Spectra of Nickel Produced under Pressure; with a Note upon the Influence of Temperature and Density Gradients upon the Displacements of the Spectrum Lines.” Phil. Mag. (6)39: 385–94.Google Scholar
Burns, K., and Meggers, W. F., and Merrill, Paul W. 1919. “Relativity and the Displacement of Fraunhofer Lines.” Nature 104: 659–60.Google Scholar
Burns, K., and Walters, Francis M.. 1929. “Wave-Lengths and Atomic Levels in the Spectrum of the Vacuum Iron Arc.” PAO 6 (11): 159ff.Google Scholar
Crew, Henry, Babcock, H. D., Burns, K., Campbell, W. W., and St. John, C. E.. 1920. “Report of the Committee on Standards of Wave–Lengths.” PNAS 6: 367–69.Google Scholar
Croze, F. 1923a. “Les raies du spectre solaire et la théorie d'Einstein.” Ann. Chim. Phys. (9)19: 93–229.CrossRefGoogle Scholar
Croze, F. 1923b. “Les déplacements vers le rouge des raies de Fraunhofer et la théorie d'Einstein.” J. Phys. (6)4: 198–221.Google Scholar
Duffield, Walter Geoffrey 1907. “The Effect of Pressure upon Arc Spectra, No. 1: Iron.” Abstract. (a) APJ 26: 375–77; (b) PRSL A 79:597–99 (this is a summary of Duffield 1908a).CrossRefGoogle Scholar
Duffield, Walter Geoffrey 1908a. “The Effect of Pressure upon Arc Spectra, No. 1: Iron.” PTRSL A208: 111–62.Google Scholar
Duffield, Walter Geoffrey 1908b. “The Effect of Pressure upon Arc Spectra, No. 2: Copper, λ4000 to λ4600.” PTRSL A209: 205–26.Google Scholar
Duffield, Walter Geoffrey 1920. “The Displacement of Spectrum Lines and the Equivalence Hypothesis.” MNRAS 80: 262–72.CrossRefGoogle Scholar
Dyson, F. W., Eddington, A. S., and Davidson, C. 1920. “A Determination of the Deflection of Light by the Sun's Gravitational Field, from Observations Made at the Total Eclipse of May 29, 1919M.” PTRSL A220: 291–334.Google Scholar
Earman, John, and Clark, Glymour. 1980. “The Gravitational Redshilt as a Test of General Relativity: History and Analysis.” SHPS 11: 251–78.Google Scholar
Eddington, Arthur, Stanley. 1917a. “Einstein's Theory of Gravitation.” Obs. 40: 93–95 (these are comments on Jeans 1917).Google Scholar
Eddington, Arthur, Stanley. 1917b. “Karl Schwarzschild.” MNRAS 77: 314–19.Google Scholar
Eddington, Arthur, Stanley. 1917c. “Einstein's Theory of Gravitation.” MNRAS 77: 377–82.Google Scholar
Eddington, Arthur, Stanley. [1918] 1920. Report on the Relativity Theory of Gravitation. London: Fleetway. (a) 1st ed. 1918; (b) 2nd ed.. 1920.Google Scholar
Eddington, Arthur, Stanley. 1918c. “Gravitation and the Principle of Relativity.” Nature 101: 15–17, 34–36.CrossRefGoogle Scholar
Einstein, Albert. 1907. “Uber das Relativitatsprinzip und die aus demselben gezogenen Folgerungen.” JRE 4: 411–62Google Scholar
Einstein, Albert. 1907. “Uber das Relativitatsprinzip und die aus demselben gezogenen Folgerungen.” JRE. 5:98–99.Google Scholar
Einstein, Albert. [1911] 1923. “Über den Einfluss der Schwerkraft auf die Ausbreitung des Lichtes.” (a) Ann. Phys. (4)35: 898–908; (b) in Sommerfeld 1923, 72–80.Google Scholar
Einstein, Albert. 1912a. “Lichtgeschwindigkeit und Statik des Gravitationsfeldes.” Ann. Phys.. 38: 355–69.CrossRefGoogle Scholar
Einstein, Albert. 1912b. “Zur Theorie des statischen Gravitationsfeldes.” Ann. Phys.., 443–48.CrossRefGoogle Scholar
Einstein, Albert. 1914. “Formale Grundlagen der Allgemeinen Relativitätstheorie.” SB. Berlin, pp. 1030–85.Google Scholar
Einstein, Albert. 1915a. “Zur allgemeinen Relativitätstheorie.” SB. Berlin., 4 November 1915, 778–86; also “Nachtrag,” SB. Berlin., 799–801.Google Scholar
Einstein, Albert. 1915b. “Erklarung der Perihelbewegung des Merkur aus der ailgemeinen Relativitätstheorie.” SB. Berlin., 831–39.Google Scholar
Einstein, Albert. 1915c. “Die Feldgleichungen der Gravitation.” SB. Berlin., 844–47.Google Scholar
Einstein, Albert. [1915] 1925. “Die Relativitätstheorie.” In Kuliurder Gegenwart. Die Physik. Leipzig and Berlin. (a) 1st. ed. 1915, 703–13; (b) 2nd ed. 1925, 783–97.Google Scholar
Einstein, Albert. [1916] 1923. Die Grundlage der ailgemeinen Relaziviiäistheorie. Ann. Phys. (4)49: 769–822; reprinted in Sommerfeld 1923, 81–124.Google Scholar
Einstein, Albert. 1917. Über die spezielle und die ailgemeine Relativitätstheorie, Braunschweig: Vieweg; (a) 1st ed. 1917; (b) 10th ed. 1920; (c) Reprint of 21st, 1969 ed.; 1969: 1979; (d) in Engi. transl. Relativity, the Special and General Theory, New York: Crown, 1961.Google Scholar
Einstein, Albert 1919a. “Prufung der allgemeinen Relativitätstheorie.” Naiw. 7:776.Google Scholar
Einstein, Albert 1919b. “Albert Einstein on his Theories: Time, Space, and Gravitation.” Times, No. 42,269, 28 November, pp. 13–14.Google Scholar
Einstein, Albert 1920. “[Excerpt of Letter by Einstein]. Nature 104:565 (see also reply by St. John 1920b). Evershed, John. 1909a. “Pressure in the Reversing Layer.” KOB 18:131–34.Google Scholar
Einstein, Albert 1909b. “The Spectrum of Sunspots.” MKO 1 (1): l–54.Google Scholar
Einstein, Albert 1909–1910. “Radial Movement in Sun-spots.” (a) KOB 15:63–69Google Scholar
Einstein, Albert 1909–1910. “Radial Movement in Sun-spots.” (b) MNRAS 69:454–57Google Scholar
Einstein, Albert 1909–1910. “Radial Movement in Sun-spots.” (c) KOB. 70: 217–25.Google Scholar
Einstein, Albert. 1913a. “A New Method of Measuring Small Displacements of Spectrum Lines.” KOB 32: 17–25.Google Scholar
Einstein, Albert. 1913b. “A New Interpretation of the General Displacements of the Lines of the Solar Spectrum towards the Red.” KOB 3 (36):45–53.Google Scholar
Einstein, Albert. 1914a. “On the Displacement of the Spectrum Lines at the Sun's Limb.” (a) KOB 3 (39):71–81; (b) Obs. 37:124–28 (in collaboration with T. Royds).Google Scholar
Einstein, Albert. 1914c. “The General Shift of Fraunhofer Lines towards the Red.” Obs. 37:388 (this is a comment on Julius 1914b).Google Scholar
Einstein, Albert. 1914d. “Note on Radial Movement in Sun-spots.” APJ 40: 156–58 (see also an answer in St. John 1914a).Google Scholar
Einstein, Albert. 1918a. “The Displacement of Cyanogen Bands in the Solar Spectrum.” Obs. 41:371–75.Google Scholar
Einstein, Albert. 1918b. “The Positive or Negative Methods of Measuring Spectra.” Obs. 41:443–45.Google Scholar
Einstein, Albert. 1919. “The Displacement of the Solar Lines Reflected by Venus.” Obs. 42:51–52.Google Scholar
Einstein, Albert. 1920a. “Displacement of the Lines in the Solar Spectrum and Einstein's Prediction.” Obs. 43:153–57 (see also reply in St. John 1920a).Google Scholar
Einstein, Albert. 1920b. “On the Displacement of the Triplet Bands near λ3883 in the Solar Spectrum.” KOB 64:297–304.Google Scholar
Einstein, Albert. 1920c. “Abstract of Paper on Shift of Fraunhofer Lines Observed at Kokaikanal Observatory.” Nature 106:357.Google Scholar
Einstein, Albert. 1920d. “Kodaikanal and Madras Observatories.” MNRAS 80:395–97.Google Scholar
Einstein, Albert. 1921a. “The Einstein Spectral Shift.” Nature 106:705 (this is a summary of Evershed 1920b).Google Scholar
Einstein, Albert. 1921b. “The Relativity Shift in the Solar Spectrum.” Obs. 44:243–45.Google Scholar
Forbes, Eric Gray. 1961. “A History of the Solar Red Shift Problem.” Ann. Sci. 17: 129–64.CrossRefGoogle Scholar
Fowler, R. H., and Milne, Edward Arthur. 1923. “The Intensities of Absorption Lines in Stellar Spectra, and the Temperatures and Pressures in the Reversing Layers of Stars.” MNRAS 83:403–24.CrossRefGoogle Scholar
Freundlich, E. F., St. John, C. E. and Albert, Einstein. 1931. “New Proofs Found of an Einstein Idea. He Is Told Findings Show Rays of Star Light Bend in Passing near Sun.” NYT, 21 February, p. 3, col. 3.Google Scholar
Glaser, Ludwig, C. 1923. “Die Einsteinsche Relativitätstheorie und die Rotverschiebung der Fraunhoferschen Linien.” JRE 20:277–352.Google Scholar
Goos, Fritz. 1912–1913a. “Standard Wave-Lengths in the Arc Spectrum of Iron, Reduced to the International Unit.” APJ 35:221–32.CrossRefGoogle Scholar
Goos, Fritz. 1912–1913b. “A Further Contribution toward the Establishment of a Normal System of Wave-length in the Arc Spectrum of Iron.” APJ 38: 141–57.CrossRefGoogle Scholar
Grebe, leonhard and Bachem, Albert. 1919. “Über den Einsteineffekt im Gravitationsfeld der Sonne.” Verh.d. D. Phys. Ges. 21:454–64 (see also St. John 1920b, Schuize 1921).Google Scholar
Goos, Fritz. 1920a. “Über die Einsteinverschiebung im Gravitationsfeld der Sonne.” Z. Phys. 1:51–54.Google Scholar
Goos, Fritz. 1920b. “Die Einsteinsche Gravitationsverschiebung im Sonnenspektrum der Stickstoffbande λ = 3883 AE.” Z. Phys. 2:415–22.Google Scholar
Halm, J. 1907. “Über eine bisher unbekannte Verschiebung der Fraunhoferschen Linien des Sonnenspektrums.” AN 173, No. 4146–4147, col. 272–88.Google Scholar
Hentschel, Klaus. 1990a. Interpretationen und Fehlinterpretationen derspeziellen und aligemeinen Relativitätstheorie durch Zeilgenossen Albert Einsteins. Science Networks Series, vol. 6. Basel, Berlin and Boston: Birkhauser.Google Scholar
Hentschel, Klaus. 1990b. “Die Gravitations-Rotverschiebung in der Einschatzung einiger theoretischer Physiker.” WRPMDP, 13.Google Scholar
Hentschel, Klaus. 1991. “Julius und die anomale Dispersion: Facetten der Geschichte eines gescheiterten Forschungsprogrammes.” Studien aus dem Philosophischen Seminar, Universität Hamburg, Series 3, Issue No. 6.Google Scholar
Hentschel, Klaus. 1992a. “Grebe/Bachems photometrische Analyse der Linienprofile und die Gravitations-Rotverschiebung: 1919 bis 1922.” Ann. Sci. 49:21–46.CrossRefGoogle Scholar
Hentschel, Klaus. 1992b. “Der Einstein-Turm, E. D. Freundlich und die Relativitätstheorie — Ansätze zu einer ‘dichten Beschreibung’ von institutionellen, biographischen und theoriengeschichtlichen Aspekten.” Heidelberg: Spektrum.Google Scholar
Hentschel, Klaus. 1922c. “Einstein's Attitude towards Experiments: Testing Relativity Theory 1907–1927.” SHPS 23:593–624.Google Scholar
Hentschel, Klaus. 1993. “The Discovery of the Redshift of Spectral Lines in the Sun's Fraunhofer Spectrum by Rowland and Jewell in Baltimore around 1890.” To appear in HSPS, 23.Google Scholar
Hetherington, Norriss, S. 1980. “Sirius B and the Gravitational Redshift: An Historical Review.” QJRAS 21:246–52.Google Scholar
Hentschel, Klaus. 1984. Science and Objectivity: Essays in the History of Astronomy. Ames: Iowa State University Press; see especially chaps. 6ff.Google Scholar
Humphreys, William, Jackson. 1908. “Bericht über die Verschiebung von Spektrallinien durch Druck.” JRE 5:324–74.Google Scholar
Jeans, James, Hopwood. 1917. “Einstein's Theory of Gravitation.” Obs. 40:57–58 (see also Eddington 1917a).Google Scholar
Jeans, James, Hopwood, et al. 1920. “Discussion on the Theory of Relativity.” PRSL A97:66–79.Google Scholar
Joy, Alfred, H. 1935. “Charles Edward St. John.” Pop. Asir. 43:611–17.Google Scholar
Julius, Willem Henri. 1910. (a) “Over de verklaring van spectroheliogrammen en lijnverplaatsingen, en over anomale verstroiing van het licht.” VKAWA 18:913–24; (b) in Engl. trans. “Note on the Interpretation of Spectroheliograph Results and of Line Shifts, and on Anomalous Scattering of Light.” P. Amst. 12: 2ff.; (c) in: APJ 3L:419–29.Google Scholar
Julius, Willem Henri. 1914a. “Radial Motion in Sun-spots?” APJ 40:1–32 (critique of St. John 1913a; see also St. John 1914a).CrossRefGoogle Scholar
Julius, Willem Henri. 1914b. “Note on the General Shift of the Fraunhofer Lines towards the Red, and on the Distortion of the Lines in the Spectrum of Excentrically Located Sun-spots.” Obs. 37:252–57 (see also Evershed 1914c).Google Scholar
Julius, Willem Henri. [1914] 1917. “Toetsing van de dispersietheorie der zonneverschijnselen aan de metingen van Adams en St. John betreffende verplaatsingen van de Fraunhofersche lijnen in het spectrum van den zonnerand en dat van zonnevlekken.” VKAWA 22:1243–64; in French version: “Un essai de l'efficacit´ de la dispersion anomale dans le soleil, déduit d'observations publiées par l'observatoire de Mont Wilson, relatives aux déplacements des raies de Fraunhofer dans les spectres du bord et des taches solaires.” ANSEN (3A) 4:51–73.Google Scholar
Julius, Willem Henri. 1915–1916. “Anomale dispersie en Fraunhofersche lijnen. Weerlegging van geopperde Bezwaren.” VKAWA 24:678–89, 865–78. English transi.: “Anomalous Dispersion and Fraunhofer Lines. Reply to Objections.” APJ 43:43–66 (this is a reply to St. John 1915b).Google Scholar
Julius, Willem Henri. 1924. “Die Rotverschiebung der Fraunhoferschen Linien.” Z. Phys. 27, 23–29; in French transl.: “Les d´placements des raies de Fraunhofer vers le rouge.” ANSEN (3A) 9:98–105 (this is a comment on St. John 1923–24 and 1924).CrossRefGoogle Scholar
Marsden, Brian, G. 1981. “St. John, Charles Edward.” DSB 11–12:72–73.Google Scholar
Millikan, Robert, A. 1938. “George Ellery Hale.” Science N.S. 87:205–6.CrossRefGoogle Scholar
Mitchell, S. A. 1936. “Eclipses of the Sun.” Handbuch der Astrophysik 7:382–409.Google Scholar
N. N. 1924. “Eine neue Bestatigung der Einsteinschen Theorie?” VZ. 4 February 1924 (on St. John 1923–24).Google Scholar
Newall, Hugh Frank. 1924. “Hale's Magnetic Vortices.” Nature 113:112.CrossRefGoogle Scholar
Newall, Hugh Frank. 1933. “Scientific Worthies XLVII: George Ellery Hale.” Nature 132:1–6.CrossRefGoogle Scholar
Pérot, Alfred (Jean Baptiste Gaspard Gustave). 1910. “Étude de Ia variation de la longueur d'onde de la lumiére solaire au bord du soleil.” GRAS 151: 38–41.Google Scholar
Pérot, Alfred 1920a. “Sur la variation avec la pression de la longueur d'onde des raies de bande du cyanogéne.” GRAS 170:988–90.Google Scholar
Pérot, Alfred 1920b. “Comparaison des longueurs d'onde d'une raie de bande du cyanogène dans la lumiére du soleil et dans celle d'une source terrestre.” GRAS 171:229–32.Google Scholar
Pérot, Alfred 1921–1922. “Mesure de la pression de l'atmosphére solaire dans la couche de magnesium et verification du principe de relativité.”(a) Summary in CRAS 172 (1921):578–81; (b) J. Phys. (6)3 (1922):101–09.Google Scholar
Pérot, Alfred 1922. “Mesure de la pression dans l'atmosphére solaire.” GRAS 174:933–34.Google Scholar
Rayleigh, lord (John William Strutt). 1871. “On the Scattering of Light by Small Particles.” Phil. Mag. (4)41:447–54.Google Scholar
Rayleigh, lord 1881. “On the Electromagnetic Theory of Light.” Phil. Mag. (5)12:81–101.CrossRefGoogle Scholar
Rayleigh, lord 1899. “On the Transmission of Light Through an Atmosphere Containing Small Particles in Suspension, and on the Origin of the Blue of the Sky.” Phil. Mag. (5)47:375–84.CrossRefGoogle Scholar
Saha, Meghnad. 1920a. “Ionization in the Solar Chromosphere.” Phil. Mag. (6)40:472–88.CrossRefGoogle Scholar
Saha, Meghnad. 1920b. “Elements in the Sun.” Phil. Mag. (6)40:809–24.CrossRefGoogle Scholar
Saha, Meghnad. 1921a. “On the Problems of Temperature Radiation of Gases.” Phil. Mag. (6)41:267–78.CrossRefGoogle Scholar
Saha, Meghnad. 1921b. “On a Physical Theory of Stellar Spectra.” PRSL A99:135–53.Google Scholar
St. John, Charles Edward. 1910a. “The Absolute Wave-lengths of the H and K Lines of Calcium in Some Terrestrial Sources.” APJ 31:143–56.CrossRefGoogle Scholar
St. John, Charles Edward. 1910b. “The General Circulation of the Mean and High-Level Calcium Vapour in the Solar Atmosphere.” APJ 32:36–82(same as C.Mt. W., no. 48).CrossRefGoogle Scholar
St. John, Charles Edward. 1910–1911. “Motion and Condition of Calcium Vapour over Sun-spots and Other Special Regions.” APJ 34:57–78, 131–53 (same as C.Mt. W, no. 54).CrossRefGoogle Scholar
St. John, Charles Edward. 1913a. “Radial Motion in Sun Spots.” “I: The Distribution of Velocities in the Solar Vortex.” APJ 37:322–53 (same as C.Mt. W., no. 69); (b) “II: The Distribution of the Elements in the Solar Atmosphere.”APJ 38:341–91 (same as C.Mt. W., no. 74).CrossRefGoogle Scholar
St. John, Charles Edward. 1913c. “Sondage de l'atmosphére solaire par les mesures de vitesse radiales dans des taches.” CRAS 157:428–430.Google Scholar
St. John, Charles Edward. 1914a. Note on Radial Movement in Sun-spots. APJ 40:158–59 (answer to Evershed 1914d).Google Scholar
St. John, Charles Edward. 1914b. “On the Distribution of the Elements on the Solar Atmosphere as Given by Flash Spectra.” APJ 40:356–76 (same as C.Mt. W., no. 88).CrossRefGoogle Scholar
St. John, Charles Edward. 1915a. “Anomalous Dispersion in the Sun in the Light of Observations.” APJ 41:28–71 (same as C.Mt. W., no. 93).CrossRefGoogle Scholar
St. John, Charles Edward. 1915b. “Critique of the Hypothesis of Anomalous Dispersion in Certain Solar Phenomena.” PNAS 1:21–25 (see also reply by Julius 1915–16).CrossRefGoogle Scholar
St. John, Charles Edward. 1916a. “The Situation in Regard to Rowland- Preliminary Table of Solar Spectrum Wave-Lengths.” PNAS 2:226–29.CrossRefGoogle Scholar
St. John, Charles Edward. 1916b. “On the Suggested Mutual Repulsion of Fraunhofer Lines.” PNAS 2:458–61.CrossRefGoogle Scholar
St. John, Charles Edward. 1916c. “Observational Evidence That the Relative Position of Fraunhofer Lines Are Not Systematically Affected by Anomalous Dispersion.” APJ 44:311–41 (same as C.Mt.W., no. 123).CrossRefGoogle Scholar
St. John, Charles Edward. 1916d. “Anomalous Dispersion in the Sun.” Obs. 39:462–65 (see also Julius 1915–16).Google Scholar
St. John, Charles Edward. 1917a. “A Search for an Einstein Relativity-Gravitational Effect in the Sun.” PNAS 3:450–52.CrossRefGoogle Scholar
St. John, Charles Edward. 1917b. “The Principle of Generalized Relativity and the Displacement of Fraunhofer Lines toward the Red.” APJ 46:249–69 (same as C.Mz. W., no. 138).CrossRefGoogle Scholar
St. John, Charles Edward. 1918a. “The Displacement of the Fraunhofer Lines toward the Red.” Obs. 41:183 (summary of St. John 1917b).Google Scholar
St. John, Charles Edward. 1918b. “Relativity and Shifts of Fraunhofer Lines.” Nature 100:433.Google Scholar
St. John, Charles Edward. 1918c. “Our Nearest Star, the Sun.” PASP 30:15–28.CrossRefGoogle Scholar
St. John, Charles Edward. 1918d. “The Green Corona Line.” PASP., 250–251.CrossRefGoogle Scholar
St. John, Charles Edward. 1918e. “The Distribution of the Elements in the Solar Atmosphere from Eclipse Results.” PAAS 3:94.Google Scholar
St. John, Charles Edward. 1918f. “On Pressure in the Solar Atmosphere.” PAAS., 95.Google Scholar
St. John, Charles Edward. 1918g. “On the Mutual Repulsion of Solar Spectrum Lines.” PAAS 3:219–20 (see also St. John and Ware 1918).Google Scholar
St. John, Charles Edward. 1920a. “Displacement of Solar Lines and the Einstein Effect.” Obs. 43:158–62 (this is a reply to Evershed 1920a).Google Scholar
St. John, Charles Edward. 1920b. “The Displacement of Solar Spectrum Lines.” Ohs. 43:260–62. (this is a comment on Einstein 1920 about Grebe and Bachem 1919).Google Scholar
St. John, Charles Edward. 1920c. “Report on the Committee on the Determination of Solar Rotation by the Displacement of Lines.” PANS 6:369–72.Google Scholar
St. John, Charles Edward. 1920d. “The Spectroscopic Committee of the Division of Physical Sciences of the National Research Council.” Phys. Rev. (2)16:372/–74.Google Scholar
St. John, Charles Edward. 1920e. “The Astronomical Bearing of the Theory of Generalized Relativity.” PASP 32:191.Google Scholar
St. John, Charles Edward. 1920f. “The Spectroscopic Committee of the Division of Physical Sciences of the Research Council.” PASP., 192.Google Scholar
St. John, Charles Edward. 1921a. “Solar Faculae and Ionization.” CJPL 15(29):l–14.Google Scholar
St. John, Charles Edward. 1921b. “The Displacement of Solar Lines.” Nature 106:789–90.CrossRefGoogle Scholar
St. John, Charles Edward. 1921c. “Great Display in California: Prof. St. John Discusses Relation of Aurora to Sun.” NYT 17 May, p. 4, col. 3.Google Scholar
St. John, Charles Edward. 1921d. “Displacement of Solar Lines and Relativity.” Yearbook of the Carnegie Institution for 1921 20:242–48.Google Scholar
St. John, Charles Edward. 1922a. “14 éme. commission des étalons de longueur d'onde et tables de spectres solaires. Recommandations.” TIAU 1:35–48.Google Scholar
St. John, Charles Edward. 1922b. “Bemerkung zur Rotverschiebung.” Phys. Z. 23, 197.Google Scholar
St. John, Charles Edward. 1922c. “Says Nobody Lives on Planet Venus: Prof. St. John Tells Astronomical Society It Is as Deserted as the Moon.” NYT, 1 January, p. 17, col. 3.Google Scholar
St. John, Charles Edward. 1922d. “No Life on Venus Like That on Earth: Dr. St. John's Observations Make This Certain, Says Princeton Astronomer (Henry Norris Russell),” NYT, 8 January, sec. II, p. 12, col. 1–2.Google Scholar
St. John, Charles Edward. 1922e. Remarks on Testing the Einstein Theory by Displacements of Solar Lines.” Obs. 45:210–12.Google Scholar
St. John, Charles Edward. 1923a. “The Einstein Theory.” Science N.S. 58, Suppl. pp. x, xii, 28 September (see also Turner 1923).Google Scholar
St. John, Charles Edward. 1923b. “On Observational Displacement of Solar Lines.” MNRAS 84:93–96.CrossRefGoogle Scholar
St. John, Charles Edward. 1923–1924. “The Atmosphere of the Sun and Relativity.” (a)PAAS 5 (1927), Report for the 30th meeting, Mount Wilson, 1923, 84–86; (b) Pop. Ast. 32:23–25.Google Scholar
St. John, Charles Edward. 1924a. “Zur Gravitationsverschiebung in Sonnenspektrum.” Z. Phys. 21:159–62 (this is the German translation of St. John 1923b; see also von Laue 1924).CrossRefGoogle Scholar
St. John, Charles Edward. 1924b. “The Displacement of Solar Lines and General Relativity.” AVCIF, 532–33.Google Scholar
St. John, Charles Edward. 1924c. “Comparison of Displacements Observed and Calculated from Relativity Theory.” AVCIF, 534–35.Google Scholar
St. John, Charles Edward. 1924d. “Offers Sun Proof of Einstein Theory: Dr. John Says ‘Third Effect’ Is Confirmed at Mt. Wilson Observatory.” NYT, 25 April, p. 9, col. 2.Google Scholar
St. John, Charles Edward. 1925. “Rotation of the Sun.” PAAS 5:290–291.Google Scholar
St. John, Charles Edward. 1926. “The Red Shift of Solar Lines and Relativity.” PNAS 12:65–68.CrossRefGoogle Scholar
St. John, Charles Edward. 1927a. “Revision of Rowland's Preliminary Tables of Solar Spectrum Wave lengths.” PASP 39:256–57.Google Scholar
St. John, Charles Edward. 1927b. “Revision of Rowland's Preliminary Table of Solar Spectrum Wave lengths.” PNAS 13:678–83.CrossRefGoogle Scholar
St. John, Charles Edward. 1928a. “Evidence for the Gravitational Displacement of Lines in the Solar Spectrum Predicted by einstein's Theory.” APJ 67: 195–239 (same as C.Mt. W., no. 348).CrossRefGoogle Scholar
St. John, Charles Edward. 1928b. “Some Results of the Revision of the Rowland Table.” PASP 40:270–71.Google Scholar
St. John, Charles Edward. 1929a. “Elements Unidentified or Doubtful in the Sun: Suggested Observations.” APJ 70:160–74 (same as C.Mz. W., no 385).CrossRefGoogle Scholar
St. John, Charles Edward. 1929b. “The Unit Character of Multiplets.” APJ., s.312–18 (same as C.Mt. W., no. 389).CrossRefGoogle Scholar
St. John, Charles Edward. 1929c. “Excitation Potential in Solar Phenomena.” APJ., 319–30 (same as C.Mt. W., no. 390).CrossRefGoogle Scholar
St. John, Charles Edward. 1929d. “Sees Einstein Stop as Big Science Aid: Dr. St. John Says that Theory Might Give First Weapon in Attacking Gravitation Mysteries.” NYT, 1 February, p. 3, col. 3.Google Scholar
St. John, Charles Edward. 1929e. “Growth in Our Knowledge of the Sun.” PASP 41:133–44.CrossRefGoogle Scholar
St. John, Charles Edward. 1929f. “Elements in the Sun.” PNAS 15:789–93.CrossRefGoogle Scholar
St. John, Charles Edward. 1930a. “The Einsteinian Displacement of Spectral Lines (Abstract).” PASP 42:254.Google Scholar
St. John, Charles Edward. 1930b. “Says Tests Upset Ether Drift Theory: Dr. St. John, After 30,000 Experiments, Finds Light Velocity the Same in All Directions.” NYT, 20 April, p. 5, col. 3.Google Scholar
St. John, Charles Edward. 1931a. “Gives Einstein Data on Sun's Atmosphere.” NYT, 10 February, p. 15, cot. 6.Google Scholar
St. John, Charles Edward. 1931b. “Einstein Discusses Rotation of Sun. Confers with Dr. St. John, Solar Research Authority, Who Suggests Currents Affect Speed.” NYT, 22 February, p. 17, col. 3.Google Scholar
St. John, Charles Edward. 1932. “Observational Basis of General Relativity.” PASP 44:277–95.CrossRefGoogle Scholar
St. John, Charles Edward. 1935. “Dr. C. E. St. John, Astronomer, Dies: Found Evidence Many Years Ago Supporting Einstein's Gravitation Theory.” NYT, 27 April, p. 17, col. 3.Google Scholar
St. John, C. E., and Adams, W. S.. 1916. “The Question of Diffused Light in Mount Wilson Solar Observations.” JRASC 10:553–55.Google Scholar
St. John, C. E., and Adams, W. S.. 1924. “Convection Currents in Stellar Atmospheres.” APJ 60:43–49 (same as C.Mt. W, no. 279).CrossRefGoogle Scholar
St. John, C. E., Adams, W. S., and Ware, L. W.. 1918. “Solar Rotation in 1914–15.” PAAS 3:136–37.Google Scholar
St. John, C. E., and Babcock, H. D.. 1914. “A Displacement of Arc Lines Not Due to Pressure.” Phys. Rev. (2)3:487–88.CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1915a. “A Study of the Pole Effect in the Iron Arc.” APJ 42:25 1ff. (same as C.Mt. W., no. 106).CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1915b. “Variability of Spectrum Lines in the Iron Arc.” PNAS 1:131–36.CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1917. “The Elimination of the Pole-Effect from the Source for Secondary Standards of Wave-Length.” APJ 46:138–66 (C.Mt. W., no. 137; see also comment by von Laue and Pringsheim 1922).CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1920. “Concerning Tables of Solar Wave-Lengths in the International System.” PASP 32:192.Google Scholar
St. John, C. E., and Babcock, H. D.. 1921. “Wave-Lengths of Lines in the Iron Arc from Grating and Interferometer Measures λ3370–λ6750.” APJ 53:260–99 (same as C.Mt. W., no. 202).CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1922. “An Investigation of the Constancy in Wave-Length of the Atmospheric and Solar Lines.” APJ 55: 36–47 (same as C.Mt.W.,, no. 223).CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1924a. “Pressure and Circulation in the Reversing-Layer of the Sun's Atmosphere.” AP.J 60:32–42 (C.Mt. W., no. 278).CrossRefGoogle Scholar
St. John, C. E., and Babcock, H. D.. 1924b. “On Pressure and Convection Currents in the Atmospheres of the Sun and Stars. (a) PAAS 5:191; (b) Pop. Ast. 32:621–22.Google Scholar
St. John, C. E. and Moore, C. E.. 1927. “As to Cadmium in the Sun.” PASP 39:314‐17.CrossRefGoogle Scholar
St. John, C. E., Moore, C. E., Ware, L. W., Adams, E. F., and Babcock, H. D.. 1928. Revision of Rowland's Tables of Solar Spectrum Wave Lengths with an Extension to the Present Limit of the Infra-Red. Washington: Publ. of the Carnegie Institute, No. 396.Google Scholar
St. John, C. E., and Nicholson, Seth B.. 1920a. “Relative Wave-lengths of Skylight and Venus-Reflected Sunlight.” PASP 32:194.Google Scholar
St. John, C. E., and Nicholson, Seth B.. 1920b. “Determination of the Solar Parallax from Spectroscopic Observations of Venus.” PASP., 332–34.CrossRefGoogle Scholar
St. John, C. E., and Nicholson, Seth B.. 1921a. “On Systematic Displacements of Lines in Spectra of Venus.” APJ 53:380‐91 (same as C.Mt. W., no. 208).CrossRefGoogle Scholar
St. John, C. E., and Nicholson, Seth B.. 1921b. “The Spectrum of Venus: No Oxygen or Water Vapour Lines Present.” PAAS 4:326–27 (report for the 27th meeting, Swarthmore, 1921).Google Scholar
St. John, C. E., and Nicholson, Seth B.. 1922. “Further Observations on the Spectrum of Venus.” PAAS., 385–86 (report for the 28th meeting, Williams Bay, 1922).Google Scholar
St. John, C. E., and Nicholson, Seth B.. 1924. “On the Absence of Selective Absorption in the Atmosphere of Venus.” PASP 33:208–9.CrossRefGoogle Scholar
St. John, C. E., and Ware, Louise W.. 1912–1914. “Tertiary Standards with the Plane Grating; the Testing and Selection of Standards.” (a) “First Paper,” APJ 36: 14–53 (same as C.Mt. W., no. 61); (b) “Second Paper,” APJ 39:5–28 (same as C.Mt. W., no. 75).CrossRefGoogle Scholar
St. John, C. E., and Ware, Louise W.. 1913. “Standards of Wave-lengths and Desirable Data for Them and for Other Lines.” Phys. Rev. (2)1:67 (title only, cf. 1912–14b, 10–11).Google Scholar
St. John, C. E., and Ware, Louise W.. 1916a. “The Accuracy Obtainable in the Measured Separation of Close Solar Lines: Systematic Errors in the Rowland Table for Such Lines.” AP.J 44: 15–38 (same as C.Mt. W., no. 120).CrossRefGoogle Scholar
St. John, C. E., and Ware, Louise W.. 1916b. “The Measurement of Close Pairs of Solar Lines.” PASP 28:196.Google Scholar
St. John, C. E., and Ware, Louise W.. 1916c. “The Suggested Mutual Influence of Fraunhofer Lines.” PASP., 197.Google Scholar
St. John, C. E., and Ware, Louise W.. 1916d. “Systematic Errors in the Rowland Table for Close Pairs of Solar Spectrum Lines.” PAAS 3:218–19 (report for the 19th meeting, 1916).Google Scholar
St. John, C. E., and Ware, Louise W.. 1918. “Notes on Solar Rotation.” PAAS 4: 46–47 (report for the 22nd meeting, Harvard, 1918).Google Scholar
Schulze, Franz Arthur. 1921. “Die Rotverschiebung im Sonnenspektrum.” Z.Phys. 5:371–73.CrossRefGoogle Scholar
Schuster, Arthur. 1905. “Radiation through a Foggy Atmosphere.” AP.J 21:1–22.CrossRefGoogle Scholar
Schwarzschild, Karl. 1914. “Über die Verschiebung der Banden bei 3883 Å im Sonnenspektrum.” SB. Berlin, 1201–13.Google Scholar
Sitter, Willem de. 1916–1917. “On Einstein's Theory of Gravitation and Its Astronomical Consequences.” MNRAS 76:699–728 (I), 77, 155–84 (II), and 78, 3–28 (III).CrossRefGoogle Scholar
Sommerfeld, Arnold, ed. 1923 [1974] Das Relativitätsprinzip. Eine Sammiung von Abhandlungen. H. A. Lorentz-A. Einstein-H. Minkowski. Stuttgart: B. G. Teubner.Google Scholar
Stark, Johannes. 1915. “Bericht über die Verbreiterung von Spektrallinien.” JRE 12:349–440.Google Scholar
Stratton, F. J. M., Jeans, J. H., Newall, H. F., and Dyson, F. W.. 1938. “Obituary Notices. Dr. G. E. Hale, Foreign Members of the Royal Society” Nature 141:501–3.CrossRefGoogle Scholar
Sugimoto, Kenij. 1989. Albert Einstein. A Photographic Biography. New York: Schocken.Google Scholar
Turner, H. H. 1923. “Confirmation of the Einstein Theory.”(a) Times, December; (b) Science N. S. 58:517.Google Scholar
Von Laue, Max 1924. “Einsteins Gravitationstheorie bestatigt. Die Rotver schiebung der Spektrallinien auf der Sonne.” VZ, 29 April (this is a comment on St. John 1924a).Google Scholar
von Laue, M. and Pringsheim, Peter. 1922. “St. Johns und Babcocks Beobachtungen über die Rotverschiebung in den Spektrallinien auf der Sonne.” Natw. 10:330–31 (this is a comment on St. John and Babcock 1917).Google Scholar
Warga, Mary, E. 1928. “Magnesium Triplets in Arc and Solar Spectra.” PAO 6 (10): 151–58.Google Scholar
Wright, Helen. 1970. “Adams, Walter Sydney.” DSB 1:54–58.Google Scholar
Wright, Helen. 1972. “Hale, George Ellery.” DSB 6:26–34.Google Scholar
Ybabra, T. R. 1924 “St. John's Report Gratifies Einstein. But Exponent of of Relativity Theory Seeks More Proof of the ‘Third Effect’.” NYT, 27 April, sec. II, p. 1, col. 2.Google Scholar