TUANSACTIONS OF THE ROYAL MICKO. 

 SCOPICAL SOCIETY. 



DESCRIPTION OF PLATE I, 



Illustrating Dr. Guy^s paper on the Sublimation of the 



Alkaloids. 



Eig. 

 1. — Arsenious acid, with four-sided prisms. 



2. — Arsenious acid, with triangular notched plates and globules of metal. 

 3. — Corrosive sublimate. 

 4. — Cautharidine, showing two forms — a, with short plates ; b, with long 



jointed plates. 

 5. — Solanine. 

 G. — Veratrine, showing detached crystals — a, under a higii power ; 6, under 



a lower. 

 7. — Meconine. 

 8.— Cryptopia. 

 9. — Hippuric acid. 

 10, 11, 12. — Three crystalline deposits from test fluids — 10, from solution 



of bichromate of potash (y^o) ; 11, from solution of carbazotic acid 



(_a_) ; 12, from solution of nitro-prusside of sodium (y^). 



