200 DR T. ANDERSON ON SOME OF THE 



tine was separated by precipitation with ammonia. Nitrate of nitropapaverine is 

 anhydrous. Its analysis gave these results : — 



{5-497 grains nitrate of nitropapaverine gave 

 10-820 ... carbonic acid, and 

 2-450 ... water. 



Experiment. Calculation. 



Carbon, . . . 53-68 5369 C 40 240 



Hydrogen, . . 4-95 4-69 H 21 21 



Nitrogen, 9-38 N 3 42 



Oxygen, 32-24 18 144 



100-00 447 



corresponding with the formula 



C 40 H 2o ( N0 J ° 8 + HO N0 5 . 



Hydrochlorate of Nitropapaverine — is a sparingly soluble salt, crystallizing 

 in pale yellow needles. It dissolves readily in spirit, and in excess of hydro- 

 chloric acid. , 



Sulphate of Nitropapaverine — is but little soluble in water; it crystallizes in 

 minute prisms. 



Platino-Chloride of Nitropapaverine — is thrown down as a pale yellow preci- 

 pitate, when bichloride of platinum is added to a solution of the hydrochlorate. 

 Its analysis gave the following results, — 



{5-555 grains, dried at 212°, gave 

 8-245 ... carbonic acid, and 

 1-900 ... water. 



f 5-579 grains, dried at 212°, gave 

 \ 0-924 ... of platinum. 



Experiment. Calculation. 



Carbon, 



40-47 



40-66 



C 10 



240 



Hydrogen, 



3-80 



3-55 



H 21 



21 



Nitrogen, 



• 



4-72 



N 



28 



Oxygen, . 



• • • • 



16-26 



°i* 



96 



Chlorine, . 



• • • • 



18-09 



C1 3 



106-5 



Platinum, 



16-56 



16-72 



Pt 



98-7 



100-00 590-2 



corresponding completely with the formula 



C 40 H 20 (N0 4 ) 8 HC1 + PtCl. 



The rest of the salts of nitropapaverine have not been minutely examined. 



Action of Bromine on Papaverine. 



When bromine water is added, drop by drop, to a solution of hydrochlorate of 

 papaverine, a precipitate is obtained which at first immediately redissolves, but 

 on the further addition of bromine water, at length becomes permanent. It is 

 the hydrobromate of a derivative base, bromopapaverine. 



