ABSORPTION SPECTRA. 



PLATE 9. 



.62 .61 .60 ,59 5S ,.i7 .Se .5.5 .H ^'--^ 



FIG. 33. 



FIG. 34. 



FIG. 36. 



FIG. 33. SEE NO. 56. CONGO ORANGE G. 



FIG. 34. SEE NO. 141. DIANIL ORANGE G. 



FIG. 35. SEE NO. 77. CONGO BROWN G. 



FIG. 36. SEE NO. 77. CONGO BROWN G. 



hCLIOTVPE CO., aOSTON 



