86 



Messrs. Matthiessen and Wright on the Action of [Recess, 



Nitrate of Silver. 



Slowly reduced. 



Scarcely any re- 

 duction 



Reduced more 

 quickly than the 

 morphia. 



Same as apomor- 

 phia. 



Phosphate of 

 Sodium. 



1 



1 



W T hite precipitate. 



White precipitate. 



Corrosive Sublimate 

 Solution. 



Stronger solutions give a 

 white precipitate soluble 

 on boiling, crystallizing 

 out on cooling. 



Same as morphia. 



White precipitate decom- 

 posed on boiling with 

 blood-red coloration. 



White precipitate decom- 

 posed on boiling with 

 pale red colour. 



Oxalate of Ammonium. 



1 

 i 



1 



White precipitate. 



1 



Bleaching-powder Solu- 

 tion and a drop of Hy- 

 drochloric Acid. 



I 



j 



1 



Dark blood-red colour. 



Pale red colour. 



Iodide of Potassium. 



1 

 i 



1 

 1 



White precipitate. 



White precipitate. 



Sulphuric Acid and Bi- 

 chromate of Potassium. 



1 



1 



Dark blood-red colour. 



Evanescent pale red 

 coloration. 



Ammonia. 



Stronger solutions give a 

 crystalline precipitate 

 insoluble in excess. 



1 

 1 



White precipitate so- 

 luble in excess; solu- 

 tion soon decomposing. 



White precipitate 

 slightly soluble in excess. 



Nitric Acid. 



Yellow coloration. 



Yellowish coloration. 



Dark blood-red colour. 



Pale red colour. 



Carbonate of Sodium. 



Stronger solutions give 

 a white precipitate 

 insoluble in excess. 



Very strong solutions 

 cause codeia to crys- 

 tallize out slowly after 

 some hours. 



White precipitate 

 slighly soluble in excess. 



White precipitate 

 slightly soluble in excess. 



Ferric Chloride. 



Greenish-blue colora- 

 tion. 



Morphia alone yields a 

 pure blue. 



1 



Dark purple amethyst 

 coloration. 



Pale amethyst colora- 

 tion. 



Caustic Potash. 



Stronger solutions give a 

 white precipitate scarcely 

 soluble in excess. 



Stronger solutions give 

 a white precipitate 

 scarcely soluble in ex- 

 cess. 



White precipitate readily 

 soluble in excess; solu- 

 tion soon decomposes. 



White precipitate diffi- 

 cultly soluble in excess. 





B 



£ 

 U 

 C 



P 



4 



Codeia 





Apomorphia.. 



Chlorocodide.. 





X 

 B 

 •— 



c 



% 



t 



«< 

 '£ 

 ts 



c 



U 





Apomorphia.. 



1 



Chlorocodide 



