434 Dr. Stenhouse on Theine and its Preparation. 



Analysis of Theine from Paraguay Tea. 



I. 0-2095 gr. of the substance dried at 212° gave 0*525 

 carbonic acid and 0*134 water. 



II. 0-3192 gr. gave 0*572 carbonic acid and 0-1487 water. 

 "When burnt with oxide of copper, nine tubes gave carbonic 



acid and nitrogen in the proportion of four to one. 

 Found. 



The following is a more complete analysis of the double 

 salt of muriate of theine and chloride of platinum : — 



I. 0*4637 salt gave 0*412 carbonic acid and 0*1155 water. 



II. 0*4347 gave 0*386 carbonic acid and 0-1184 water. 



I. 0-461 salt gave 0-112 plat. = 24*29 per cent. 



II. 0*529 salt gave 0*130 plat. = 24*57. 



III. 0*5828 salt gave 0*143 plat. = 24*53. 



IV. 0*458 salt gave 0*112 plat. = 24*45. 



Pt 2 CI. The formula for Theine,- 



16 Carbon =1222*96 

 11 Hydrogen = 124*79 

 4 Nitrogen = 708*16 

 4 Oxygen = 400-00 

 Atomic weight= 2455*91 

 NitrO't/ieine. 

 I have given the provisional name of nitro-theine to the 

 substance crystallizing in large shining plates, produced by 

 the long-continued action of an excess of boiling nitric acid 

 upon theine. It is not necessary to employ fuming nitric acid 

 to obtain this substance, acid of the ordinary strength answers 

 equally well. Nitro-theine when crystallized out of water 

 forms large shining plates resembling cetine, but having more 



