PLATE VII. 



ALKALOIDS. 



Morphine treated with nitric acid. 



Morphine treated with solution 

 of ferric chloride. 



Codeine treated with bromine 

 water and ammonia water. 



Quinine treated with chlorine 

 water and ammonia water. 



Strychnine treated with sulphuric 

 acid and potassium dichromate. 



Br ii cine treated with nitric acid 

 and with sodium thiosulphate. 



Physostigmine treated succes- 

 sively with ammonia water, alcohol, 

 acetic acid, and again with ammonia 

 water. 



Veratrine treated with sulphuric 

 acid. 



