ABSORPTION SPECTRA. 



PLATE 25. 



S,, = PY =;.) 



FIG. 99. 



FIG. 96. SEE NO. 174. NEODYMIUM AMMONIUM NITRATE. 



FIG. 97. SEE NO. 174. NEODYMIUM AMMONIUM NITRATE, 



FIG. 98. SEE NO. 174. NEODYMIUM AMMONIUM NITRATE. 



FIG. 99. SEE PAGE 169. 



LIOTYPt CO., BOSTON. 



