108 



INDEX. 



Chromium chloride in water Beer's law. 64 

 in water molecules 



constant 65 



with calcium and alu- 

 minium chlorides . 65 



Chromium nitrate in water Beer's law. 66 

 in water molecules 



constant 67 



Chromium, salts of 63 



Cobalt acetate in water Beer's law. ... 34 

 Cobalt bromide in 



acetone Beer's law 26 



with water 28 



ethyl alcohol Beer's law 25 



with water 27 



methyl alcohol Beer's law 25 



with water 27 



water Beer's law 22 



molecules constant 22 



Cobalt bromide with calcium bromide. . 23 

 Cobalt chloride in 



acetone Beer's law 18 



acetone with water 21 



ethyl alcohol Beer's law 17 



ethyl alcohol with water 20 



methyl alcohol Beer's law 16 



methyl alcohol with water 19 



water Beer's law 13 



water ions constant 15 



water molecules constant 15 



Cobalt nitrate in water molecules con- 

 stant 30 



Cobalt, salts of 11 



salts, summary of results with ... 35 



sulphate in water Beer's law. . . 31 

 sulphocyanate in water Beer's 



law 32 



sulphocyanate in water mole- 

 cules constant 33 



Conclusions and summary 100 



Copper bromide in 



ethyl alcohol and water 54 



Beer's law 53 



methyl alcohol and water 54 



Beer's law 52 



water Beer's law 51 



molecules constant 52 



Copper chloride in 



acetone Beer's law 48 



with water 50 



ethyl alcohol Beer's law 47 



with water 50 



methyl alcohol Beer's law 46 



with water 49 



water Beer's law 45 



molecules constant 46 



Copper nitrate in water Beer's law. ... 55 

 in water molecules con- 

 stant 56 



Copper, salts of 45 



Croft, absorption spectra of chromium 



compounds 63 



Demaryay, on the absorption spectra of 



didymium compounds 68 



Dissociation 2 



Donnan and Bassett 5 



assume complex ions 35 



on the absorption of cobalt salts .... 102 

 on the absorption spectra of copper 



salts 45 



on the color changes in cobalt salts. 13 

 Drossbach, absorption spectra of praseo- 

 dymium and neodymium compounds. 70 



Emsmann, on the absorption spectrum 



of nickel nitrate 39 



Engel, on the color changes in cobalt salts 1 1 



Erbium chloride in water Beer's law. . 97 



nitrate in water Beer's law. . . 97 



salts of 68 



Etard, on the absorption spectra of 



chromium compounds 64 



on the color changes and solu- 

 bility of cobalt salts 11 



Ethyl alcohol 



and water, copper bromide in 54 



and water, neodymium chloride in. 83 



cobalt bromide in Beer's law 25 



cobalt chloride in Beer's law 17 



copper bromide in Beer's law. ... 53 



copper chloride in Beer's law 47 



ferric chloride in Beer's law 61 



neodymium chloride in Beer's law 78 



neodymium nitrate in Beer's law. 92 



with water cobalt bromide in 27 



with water cobalt chloride in 20 



with water copper chloride in 50 



Ferric chloride 



in acetone Beer 's law 62 



in ethyl alcohol Beer's law 61 



in methyl alcohol Beer's law 61 



in water Beer's law 59 



in water molecules constant 59 



with aluminium chloride 60 



with calcium chloride 60 



Gladstone, absorption spectra of chro- 

 mium compounds 63 



Hartley, absorption spectra of chromi- 

 um compounds 63 



criticizes the views of Donnan 



and Bassett 13 



on change in absorption with 

 change in temperature 101 



on the absorption spectra of 



chromium compounds 64 



on the absorption spectra of 



copper salts 45 



on the absorption spectra of 



salts of neodymium 70 



on the absorption spectra of 



solutions of cobalt salts 12 



on the absorption spectrum of 



nickel salts 39 



on the absorption spectra of 



the nitrate of erbium 70 



work of 5 



Hydrate of cobalt salts 35 



Hydrates in aqueous solutions 1 



