16 

 . Silky Salt. 



HO + 9HO=1003. 



y. Dry Residue. 

 C 57 H 33 N 2 O 5 



p J2S0 3 HO-|-3HO=949. 



The results of the analysis of the cinchonidin salt having been so 

 remarkably different from those of the formulae generally adopted for 

 the pure alkaloid, the author was induced to prepare some perfectly 

 pure quinine, taking especial pains to exclude all cinchonidin ; and 

 having from that prepared some iodo-sulphate of quinine, to submit 

 it to equally rigid analysis. ^ 



The results are the following : 



These optical crystals lose 2*49 per cent, water by prolonged 

 drying at 212 in Liebig's drying apparatus. 



The residue contains the following : 



I. II. III. IV. V. 



A 



31-729 31-69 

 9-631 9-854 



41-456 41-048 

 4-54 4-7375 



3-380 



Carbonic acid mean of 4=151-614 

 Water = 42-326 



leading to the following composition : 



822 100-000 100-000 



