88 



On the Action of Hydrochloric Acid on Codeia. [Recess, 



216 



5813 



57-83 



26 



7-00 



7*20 



80 



21*54 





14 



3-77 





35-5 



9-56 





(III.) 0*3460 gramme of hydrochlorate of codeia made from codeia gave 

 0*7360 carbonic acid and 0 2300 water. 



Calculated. Found. 



J. II. III. 



C 18 216 58-13 57-83 58-01 



7-38 



or 



N 



CI 35%5 9-56 9-67 



C 18 H 21 N0 3 , HCl-f2H 2 0 371'5 100 00 



A portion of the regenerated hydrochlorate of codeia was precipitated by 

 caustic potash and crystallized from benzole ; after drying at 1 20° it yielded 

 these numbers. 



0-3325 gramme, burnt with oxide of copper and oxygen, gave 0*8795 

 carbonic acid and 0*2185 water. 



Calculated. Found. 

 C 18 216 72*24 72-14 



H 21 21 7-02 7*30 



N 14 4*68 



O3 _48_ 16*06 



C 18 H 21 N0 3 299 100*00 

 The influence of mass upon chemical reactions is well illustrated by the 

 inverse reactions taking place between codeia and hydrochloric acid in ex- 

 cess, and chlorocodide with water in excess. 



Codeia. Chlorocodide. 

 C 18 H 20 (HO)NO 2 + HC1 = II HO + C 18 H 20 CI N0 2 



Chlorocodide. Codeia. 



0„ H 20 CI NO,+H(HO)=HCl + C„ H 20 (HO)NO a . 

 The codeia employed in the foregoing experiments forms part of a second 

 supply kindly given to us by Messrs. M'Farlane of Edinburgh. 



§ 4. On the Crystalline Form of Chloride of Apomorphia. 

 By Prof. W. H. Miller, For. Sec. R.S. 



Prof. Miller has kindly determined the crystalline form of the chloride 

 of apomorphia, which we here annex. 

 Chloride of apomorphia. 

 Prismatic : — 



0 0 1, 1 0 1 =-= 29° 26'*5 ; 1 0 0, 1 1 0 = 56° 48'*5. 

 Simple forms : — e, 10 1: m, 1 1 0. 

 Angles between normals to the faces : — 



e e' . . 58° 53' 



m m' . . 66 23 



e m ..74 23 



No cleavage observable. 

 The crystals are small, the length and breadth of one of the largest being 

 0 9 and 0*22 millimetres respectively. 



