no 



REPORT — 1902. 



tion shows two well-marked absorption bands. The first band appears 

 in the layer five millimetres thick of the solution containing one milligram- 

 molecule in 100 c.c. water. 



The second band first appears in the layer two millimetres thick of the 

 solution containing one milligram-molecule in 500 c.c. water, and is still 

 distinctly traceable in the layer three millimetres thick of the solution 

 containing one milligram-molecule in 12,500 c.c. water. 



\)-Nitroso-2ihenol. — This substance was prepared by the action of 

 nitrous acid on phenol. The absorption spectra of alcoholic solutions 



Curves of Molecular Vibrations. — (6) ^-Nitroso-phenol, 

 Scal&cfGfaliccfw/v fmffiouzes 



were photographed. The general absorption is considerably greater than 

 in the case of quinone dichiorimide. 



The layer two millimetres thick of the solution containing Tone 

 miUigram-molecule in 100 c.c. absorbs all rays beyond '■/X 2500 (\ = 



In the layer four millimetres thick of the solution containing one milli- 

 gram-molecule in 500 c.c. the spectrum is transmitted to VX 2714 

 (A == 3684). ' 



At this dilution a wide absorption band begins to appear, which is 

 still traceable in a layer one millimetre thick of a solution containing one 

 milligram-molecule in 2,500 c.c. 



A second less persistent absorption band lying between '/A 3886 



