ABSORPTION SPECTRA. 



PLATE 11. 



?H ^;i vr "1 ^fi Ti \^> "' i*' 1?^ 1^ >'^ "I ^ 1' ^*' '" '*' ' 



FIG. 41. 



FIG. 42. 



FIG. 43. 



FIG. 44. 



FIG. 41. SEE NO. 28. METHYL ORANGE III 



FIG. 42. SEE NO. 7. NAPHTHOL YELLOW. 



FIG. 43. SEE NO. 82. AURAMINE O. 



FIG. 44. SEE NO. 131. QUINOLINE YELLOW 0. 



HtLIOTYPE CO., aOSTOh. 



