6o 



INFRA-RED TRANSMISSION SPECTRA. 



so 



80 



70 



eo 



50 



+0 



/o 



O I 2 J f 5 6 8 9 /O II /2 



FIG. 46. Collodium (a) ; Ammonium chloride. 



10 



Z 45 



FIG. 47. Tartaric acid. 



6 tO 



