INDEX. 



109 



Introductory 1 



Ions constant for cobalt chloride in water 15 



for nickel chloride in water 40 



Iron, salts of 59 



Jones and Uhler 



absorption of cobalt chloride in 



methyl alcohol 17 



cadmium zinc spark 8 



on dehydration 37 



on solvation 38 



spectrograph 6 



work on cobalt salts 11 



Jones, on the absorption spectra of 

 compounds of praseodymium and 

 neodymium 69 



Knoblauch, absorption spectra of chro- 

 mium compounds 63 



on the absorption spectra 



of copper salts 45 



Kriiss and Wilson, on the absorption 

 spectra of the rare earths 68 



Lapraik, on the absorption spectra of 

 chromium compounds 64 



Light, sources of 8 



Liveing and Dewar, absorption spectra 

 of chromium compounds 63 



Liveing, on the effect of temperature on 

 the absorption spectra of compounds 

 of didymium and erbium 69 



Melde, absorption spectra of chromium 

 compounds 63 



Methods of work 3 



Methyl alcohol 



and water copper bromide in .... 54 

 and water neodymium chloride in 



mixtures of 79 



and water neodymium nitrate in 



mixtures of 93 



cobalt bromide in Beer's law 25 



cobalt chloride in Beer's law 16 



copper bromide in Beer's law 52 



copper chloride in Beer's law 46 



copper chloride in with water .... 49 



ferric chloride in Beer's law 61 



neodymium chloride in Beer's law 77 

 neodymium nitrate in Beer's law. 91 



with water, cobalt bromide in 27 



with water, cobalt chloride in 19 



Mirier, H. S Preface, 71 



Moissan, absorption spectra of chromi- 

 um compounds 63 



Molecules constant for 



chromium chloride in water 65 



chromium nitrate in water 67 



cobalt bromide in water 22 



cobalt chloride in water 15 



cobalt nitrate in water 30 



cobalt sulphocyanate in water 33 



copper bromide in water 52 



copper chloride in water 46 



copper nitrate in water 56 



ferric chloride in water. . . 59 



Molecules constant for 



neodymium chloride in water 76 



neodymium nitrate in water 91 



nickel chloride in water 41 



Miiller, absorption spectra of chromium 



compounds 63 



dissociation can not account for 



deviations from Beer's law . . . 103 

 on the absorption spectra of cop- 

 per salts 45 



on the absorption spectra of 



nickel and copper salts 100 



on the absorption spectrum of 



nickel salts 39 



work of 5 



Muthmann and Stiitzel, on the absorp- 

 tion spectra of salts of neodymium ... 70 

 Muthmann, on the absorption spectra 

 of compounds of praseodymium and 

 neodymium 69 



Neodymium bromide in water Beer's 



law 86 



Neodymium chloride, anhydrous 84 



Neodymium chloride in 



ethyl alcohol and water 83 



ethyl alcohol Beer's law 78 



methyl alcohol Beer's law 77 



mixtures of methyl alcohol and 



water 79 



water Beer's law 72 



water molecules constant 76 



water with calcium and aluminium 



chlorides 77 



Neodymium nitrate in 



acetone Beer's law 92 



ethyl alcohol Beer's law 92 



methyl alcohol Beer's law 91 



mixtures of acetone and water 94 



mixtures of methyl alcohol and 



water 93 



water Beer 's law 87 



water molecules constant 91 



Neodymium, salts of 68 



Nernst filament 10 



lamp 9 



Nickel acetate in water Beer's law. ... 43 

 Nickel chloride in water 



Beer's law 39 



ions constant 40 



molecules constant 41 



with calcium and aluminium chlo- 

 rides 41 



Nickel, salts of 39 



sulphate in water Beer's law. . 42 



Ostwald 1 



on absorption spectra 63 



on the color of solutions of cobalt 



salts 12 



Ostwald 's theory of absorption spectra. . 100 



Photographic material 7 



Potilitzin, on the color changes in co- 

 balt salts 11 



