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Published online by Cambridge University Press: 17 January 2013
In the course of a series of experiments upon fusion point, as determined by the mercurial thermometer, I had occasion to investigate several of the properties of that instrument. In the hope that the results of that investigation may economise the labour of other experimenters, and aid in its accuracy, I have ventured to submit them to the consideration of the Society. The memoir comprises the following sections:—
I. Calibration and the calibration unit.
II. The exposure correction.
III. The movement of the zero with (α) time, and (β) temperature.
IV. Poggendorff's correction.
V. Comparison of the mercurial with the air thermometer.
VI. Effect of compression.
page 567 note * Since writing the above I have found evidence that this method was used by Bessel for ascertaining positions (Pogg. Ann. lxxxii. p. 290).
page 568 note * Miller, Phil. Trans. (1856), p. 775.
page 568 note † A series of measurements of changes in the scale value of the 0° – 100° interval was made by Pierre, Ann. Ch. Phys., 1842 (444).
page 569 note * Mémoires de l'Acad. xxi. p. 225.
page 572 note * Pogg. Ann. cxxxiii. (1868) p. 316.
page 572 note † Lehrbuch der Experimentalphysik, iii. pp. 295–298.
page 574 note * Cited by Kämtz, Schweigger's Journal, xl. p. 200, where a historical resumé is given of the entire subject to the year 1824. A later exhaustive survey has been written by Egen, Pogg. Ann. xi. p. 276, et seq.
page 575 note * Ann. Ch. Phys. lxiv. 316, 317.
page 578 note * Pogg. Ann. l. 251.
page 580 note * Pogg. Ann. xli. 472.
page 580 note † Recknagel, Pogg. Ann. cxxiii. 130 (1864).
page 581 note * Ann, Ch. Phys. (3) v. 428, et seq.
page 581 note † These numbers have not received Poggendorff's correction.
page 584 note * Wüllner, , Lehrbuch der Experimentalphysik, iii. 104.Google Scholar
page 586 note * My own experiments were for the most part performed at the rate of a “series” per day.
page 586 note † Pogg. Ann. xi. p. 283 (1827).
page 587 note * Loc. cit. 351.