500 [March 19, 



analysed. Dried at 100, -630 gramme gave '1150 gramme of 

 metallic platinum. This is equivalent to 18-26 per cent. 



The formula C 42 H 22 N 2 O 4 , HC1, PtCl 2 requires 18-27 per cent. 



Tartrate of Brucine and Antimony, 



CHN,O.HJ CiHi0jr 



The salt was prepared in a precisely similar manner. It formed 

 short and excessively brittle crystals. Analysis seems to assign to 

 this salt the same constitution as those containing quinidine and 

 strychnine, as may be seen by the following results : 



I. *284 gramme brucine compound gave -5000 gramme car- 

 bonic acid and -1185 gramme water. 



II. -4845 gramme yielded -1 102 gramme of Sb O 4 . 



III. -4800 gramme yielded -1078 gramme of Sb 4 . 



IV. 3120 gramme yielded -07074 gramme of Sb. O 4 . 



Theory. 



II. III. IV. 



17'97 1775 17-91 

 679-3 99-965 



This agrees with the formula C * 6 ^ ^ 2s C 8 H 4 O ]a . 

 Tartrate of Berberine and Antimony, 



This salt was prepared by a process analogous to that employed in 

 the cases already described. It forms fibrous aggregations re- 

 sembling Wavellite. It can be recrystallized from spirit, and, with 

 less security from decomposition, out of water. As first formed, 

 however, it may readily be obtained perfectly pure by copious wash- 

 ing with cold distilled water, in which it dissolves very sparingly. 

 Dried in vacuo over sulphuric acid, 



I. '7200 gramme gave 1-2265 gramme carbonic acid and -2420 

 gramme water. 



II. -3480 gramme substance gave -0873 gramme antimonious 

 acid, 



