MAPPING ABSORPTION SPECTRA OF VARIOUS SALTS. 41 



X 4271 . X 4325 is still fainter than X 4290. The nitrate in methyl alcohol gives 

 a band at X 4280, which is not very intense, and which is about 10 Angstrom 

 units wide. 



j8 Group in Acetone. The nitrate has the band X 4280 quite weak and 

 about 15 Angstrom units wide. 



j(3 Group in Glycerol. This group in glycerol consists of a sharp and very 

 persistent band at X 4288, and two very fine bands of the same intensity at 

 X 4270 and X 4305. 



7 Group in Water. For the chloride there is a band at about X 4610 with 

 hazy edges; X 4645 a very weak band; a band at X 4685 with its red edge the 

 more sharply defined ; a rather sharp band at X 4755 and one at X 4820, which 

 is narrow and quite intense. The anhydrous chloride gives faint and hazy 

 bands at X 4640 and X 4680, narrow and intense bands at X 4717, X 4725, X 4735, 

 X 4785, X 4815, and X 4855. The nitrate shows bands at X 4737, X 4755, X 4772. 



7 Group in Methyl and Ethyl Alcohols. There are bands at X 4700, X 4780, 

 and X 4825. These bands are of about the same intensity, X 4780 being some- 

 what the narrower. X 4700 and X 4825 have faint companions to the violet. 

 The nitrate shows three faint bands at XX 4690, 4735, and 4825. 



7 Group in Glycerol. Glycerol bands of the chloride appear at XX 4620, 

 4710, 4730, 4760, 4790, and 4840. 



8 Group in Water {Green). The bands in this group form a rather com- 

 plicated series. The chloride has a deep narrow band at X 5090, a wide hazy 

 band at X 5125, a pair of very intense, narrow bands at X 5205 and X 5222, a 

 narrow band at X 5255, and a faint, hazy band at X 5315. The anhydrous 

 chloride gives a weak band at X 5088, X 5117, a narrow, intense band at X 5147, 

 X 5174, X 5183, X 5216, X 5254, X 5267, X 5282, etc. The nitrate band at X 5090 

 is much wider and hazier than the corresponding chloride band, whereas the 

 nitrate band at X 5125 seems narrower. There is a narrow band at X 5205, a 

 much more intense one at X 5225, and another narrow band at X 5235. There 

 seems to be a tendency for the chloride and nitrate spectra to become much 

 more alike as the dilution is increased. 



8 Group in Methyl and Ethyl Alcohols. These bands are X 5125 hazy and 

 moderately intense; X 5180 hazy and fainter; X 5220 intense and narrow; 

 X 5245 intense with faint companion on the red; X 5290 narrow and a faint 

 band at X 5315. The nitrate has two rather intense bands at X 5225 and X 5240. 



8 Group in Acetone. The nitrate has a hazy, but rather intense band at 

 X 5110, X 5215, and X 5255. 



8 Group in Glycerol The chloride gives bands at XX 5120 wide and hazy; 

 5170 narrow; 5190 narrow; 5230, 5240, 5250, and 5270 weak. 



e Group in Water (Yellow). For the chloride, this group consists of a 

 narrow and quite strong band at X 5725, a strong doublet at X 5745 and X 5765, 

 a band at X 5795 very similar to the one at X 5725, although more hazy. The 

 anhydrous chloride has bands at X 5768, X 5782, a narrow and intense band at 

 X 5807, X 5829, a narrow band at X 5858, etc. 



e Group in Methyl and Ethyl Alcohols. This group consists of X 5725 

 moderately intense with hazy edges; X 5765 narrower; X 5800 strong; X 5835 

 very intense; X 5860 hazy; X 5895 faint; X 5925 faint. The nitrate shows a 

 band at X 5720, probably double, a band from X 5755 to X 5845 and at X 5760, 

 X 5835, and a very intense band at X 5790. 



