ABSORPTION SPECTRA. 



PLATE 3. 



82 .81 .60 .19 .58 .67 .M .58 .B> .63 .M .lil .6 .9 .8 .57 .tj6 .*6 . .j3 .52 . M .39 .38 .37 .36 .38 .3* .33 .32 .31 .30 .29 .: 



iiiiiliiiiliii 



FIG. 10. 



FIG. 11. 



FIG. 13. 



FIG. 10. SEE NO. 80. NAPHTHOL GREEN B. 



FIG. 11. SEE NO. 47. CLOTH RED 3 G A. 



FIG. 12. SEE NO. 30. CURCUMEINE. 



FIG. 13. SEE NO. 129. COLUMBIA YELLOW. 



HELIOTTPE CO., BOSTON. 



