ABSORPTION SPECTRA. 



PLATE 26. 



.05 .01 .110 -59 ii .57 ..^0 .55 .S* .63 .52 .51 .50 .19 tS ,17 Yli 15 14 f.l 1J .1 .0 .:jl) /M ,n7 JG .115 .3* .; .fl2 .31 .30 .29 .28 .27 .26 .25 .2* .23 .22 21 .20 



py :!ilillinilllllllllllllllllliillllllllllllllllllii;' ' :i' 



FIG. 100. 



FIG. 100. SEE NO. 180. PRASEODYMIUM AMMONIUM NITRATE. 

 FIG. 101. SEE NO. 169. ERBIUM CHLORIDE. 

 FIG. 102. SEE PAGES 5 O^A,<ij 7.0 



HELIOTTPE CO., BOSTOM. 



