146 



REPORT— 1903. 



Texrauydropapavbrinb. 

 C20H25NO,. M.P. 200°. 



Solution in Alcohol. 

 (Fig. 3.) 



Thickness of 



layer in 

 millimetres 



25 and 20 

 15 

 10 



2 



5 and 4 



3 and 2 



Description of Spectrum 



A 



1 milligram-molecule in 500 c.c. 

 Spectrum continuous to 



Line showing at . 



Spectrum continuous to 



Absorption hand . 



Weak spectrum from 3824 to 



Spectrum continuous to 



Absorption band , 



Spectrum transmitted from 3821 to 



Spectrum continuous to 



Absorjition band . 



Lines showing at . 



Spectrum transmitted from 3824 to 



Spectrum continuous to 



Absorption hand .... 



Weak spectrum from 3754 to 



Same as 2 mm. 



Lines in absorption band at . 



1 milligram'molecule in 2,500 

 Spectrum practically continuous to 



Weak in position of absorption band 



Spectrum continuous to 



After this, practically all transmitted, 



3296 



3323 



3323 



3886 



3323 

 3323 to 3824 



4038 



3323 

 3323 to 3824 



4038 



3323 



3323 to 3824 



3754, 3778, 

 and 3792 



4038 



3354 



3364 to 3754 



4113 



3033 



3009 



3009 



2573 



3009 

 3009 to 2615 



2476 



3009 

 3009 to 2615 



2476 



3009 



3009 to 2615 



2663, 2646, 

 and 2637 



2476 



2981 



2981 to 2663 



2431 



3638 & 3694 2748 & 2707 



c. 



4113 



4415 



2431 



2265 



