Schlossing has made a similar investigation 

 and found that in the same plant the nicotine 

 content varies from 0.79% when young to 

 4.32% when fully matured. Most nicotine is 

 found in the ribs and veins. 



H. B. Cox (American Druggist V. 24, 1894, 

 p. 95) investigated the nicotine contents of 

 various manufactured tobaccos. These were 

 not "proprietary tobaccos" but samples ob- 

 tained from different sources at random. His 

 results are given here : 



NICOTINE CONTENTS OP DIFFERENT TOBACCOS 



Nicotine 



Syrian Tobacco leaf (a) 612% 



American Chewing Leaf 935% 



Syrian Tobacco Leaf (b) 1.093% 



Chinese Tobacco Leaf 1.902% 



Turkish Coarse Cut 2.500% 



Golden Virginia (whole strips) 2.501% 



Gold Flake Virginia 2.501% 



Navy Cut (light) 2.530% 



Light Kentuckian 2.733% 



Navy Cut (dark) 3.64 % 



Best "Bird's Eye" 3.931% 



Cut Cavendish (a) 4.212% 



Best Shag (a) 4.907% 



Cut Cavandish (b) 4.970% 



Best Shag (b) 5.00 % 



58 



