ABSORPTION SPECTRA. 



PLATE 4. 



.62 *.l t.o pn ^s 



^S .6* .6J .92 .61 .60 . .e .t7 .B .*S . .10 .li .11 .) .30 .38 .07 .06 .06 .'M .33 .32 .31 .30 .20 .28 .27 .28 .26 .2* .2,3 .22 



21 .20 



' ill 



FIG. 14. 



FIG. 15, 



FIG. 16. 



FIG. 14. SEE NO. 119. ALIZARINE RED S. 

 FIG. 15. SEE NO. 107. URANINE. 

 FIG. 16. SEE NO. 107. URANINE. 



HELiOTYPE CO., BOSTON 



