INDEX. 



Absorption and solvation 101 



spectra of solutions 1 



theories of absorption 101 



Acetone and water, neodymium nitrate 



in mixtures of 94 



Acetone, cobalt bromide in Beer's law. 26 



chloride in Beer's law. 18 



copper chloride in Beer's law. 48 



with water 50 



ferric chloride in Beer's law. 62 

 neodymium nitrate in Beer's 



law 92 



with water, cobalt bromide in . 28 

 chloride in. 21 

 Alcohols and water, praseodymium 



chloride in mixtures of the 95 



Aluminium and calcium chlorides 



with chromium chloride 65 



with neodymium chloride in water. 77 



with nickel chloride in water 41 



Aluminium chloride with ferric chloride. 60 



Ames, J. S Preface 



Anderson, on the absorption spectra of 



dry neodymium salts 85 



on the absorption spectra of 

 powdered salts of neodym- 

 ium and erbium 71 



Anhydrous neodymium chloride 84 



salts, preparation of 71 



Apparatus 6 



Association 2 



Babo, work on cobalt salts 11 



Bahr and Bunsen, on the absorption 

 spectra of compounds of didymium. . . 68 



Bassett and Donnan 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 

 Becquerel, absorption spectra of chro- 

 mium compounds 63 



on the absorption spectra of 



didymium compounds . . 68, 70 

 on the absorption spectra of 



neodymium salts 85 



Beer's law 1 



Beer's law for 



chromium chloride in water 64 



nitrate in water 66 



cobalt bromide in ethyl alcohol. ... 25 

 in methyl alcohol . . 25 



in water 22 



chloride in acetone 18 



in ethyl alcohol. ... 17 

 in methyl alcohol. . 16 



Beer's law for 



cobalt chloride in water 13 



sulphate in water 31 



sulphocyanate in water. . .32, 34 



copper bromide in ethyl alcohol .... 53 



in methyl alcohol ... 52 



in water 51 



chloride in acetone 48 



in ethyl alcohol .... 47 



in methyl alcohol ... 46 



in water 45 



nitrate in water 55 



erbium chloride in water 97 



nitrate in water 97 



ferric chloride in acetone . 62 



in ethyl alcohol 61 



in methyl alcohol . . 61 



in water 59 



neodymium bromide in water 86 



chloride in ethyl alco- 

 hol 78 



chloride in methyl al- 

 cohol 77 



chloride in water 72 



nitrate in acetone .... 92 

 nitrate in ethyl alco- 

 hol 92 



nitrate in methyl alco- 

 hol 91 



nitrate in water 87 



nickel acetate in water 43 



chloride in water 39 



sulphate in water 42 



praseodymium chloride in water ... 94 



nitrate in water .... 96 



Bersch, work on cobalt salts 11 



Bettendorf, on the absorption spectra 



of the rare earths 68 



Boudouard, on the absorption spectra of 



praseodymium and neodymium 68 



Brewster, absorption spectra of chro- 

 mium salts 63 



on the absorption spectrum of 



nickel nitrate 39 



Bunsen and Bahr, on the absorption 



spectra of didymium compounds 68 



Bunsen, on the absorption spectra of 



didymium salts 70 



Calcium and aluminium chlorides 



with chromium chloride 65 



with neodymium chloride in water . 77 



with nickel chloride in water 41 



Calcium bromide with cobalt bromide . . 23 



chloride with ferric chloride. ... 60 

 Chatelier, Le, on the color changes in 



cobalt salts 12 



107 



