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Published online by Cambridge University Press: 15 September 2014
The absorption spectra of the copper, nickel, and cobalt salts investigated in this series do not seem to depend so much upon the acid radical as on the water of solution. The latter evidently plays a very important role, and possibly complicates matters. It was therefore resolved to determine the molecular extinction coefficients in alcohol and in acetone to see whether conditions were any simpler there. It may be stated in advance that they are not.
page 137 note * Phil. Mag. (6), 15 (1908), p. 282.
page 139 note * We assumed this formula as it gave the percentage of water right. There is a trihydrate mentioned in Watt's Dictionary of Chemistry. Hartley, however, describes only two hydrates, the dihydrate and the hexahydrate.
