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Sir HENRY E. ROSCOE

Published online by Cambridge University Press:  05 October 2010

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Summary

Correspondence With Prof. H. E. ROSCOE.

Owens College, Manchester.

Feb. 24, 1860.

My Dear Mr Stokes,

I am sorry to find that you do not agree with the map of the spectrum I seat—I do not know how the difference can have arisen, for I certainly copied, as correctly as I could, the pencil map you lent me some time ago—which too I returned to you after I had copied it.

If you will allow me to keep your map for a day or two I will draw the map again—keeping the distances the same—so as to correspond with your last.

I found no difficulty in recognising the lines as I drew them. I do not know what became of those between N4 and Q, but I cannot help thinking that they were not contained in the copy you lent me formerly.

Have you seen in the last no. of the Annales de Chimie et de Physique a short note about Kirchhoff's discovery of the probable cause of the coincidence of the bands of light (produced for instance by a soda flame) and the dark lines of the spectrum?

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Publisher: Cambridge University Press
Print publication year: 2010
First published in: 1907

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