324 APPENDIX. 



NOTE (41), p. 177. 

 COMPOSITION OF MORPHIA, c 



Liebig.* Regnault. Calculated 



^ C30H20NO3 



Carbon 72*340 72'87 72*41 72-28 



Hydrogen ... 6*366 6-86 6-84 6-74 



Nitrogen 4*995 5-01 5*01 4*80 



Oxygen 16*299 15*26 15*74 16*18 



a Ann. der Pharm., XXVI., 23. 



NOTE (42), p. 177. 



COMPOSITION OF CAFFEINE, THEINE, GUARANINE, 

 THEOBROMINE, AND ASPARAGINE. 



Calculated 

 Cs H5 N2 O2 



Caffeine, a Theine. b Guaranine. c 

 Pfaffand Liebig.* Jobst. Martius. 



Carbon 49*77 50*101 49*679 49*798 



Hydrogen... 5*33 5*214 5*139 5*082 



Nitrogen ... 28*78 29.009 29*180 28*832 



Oxygen ... 16*12 15*676 16-002 16*288 



a Ann. der Pharm., I., 17. 



b Do. XXV., 63. 



e Do. XXVI., 95. 



Guaranine is the name given to the crystalHzed prin- 

 ciple of the guarana officinalis, till it was shewn to be 

 identical with caffeine and theine, as the above analyses 

 demonstrate. 



COMPOSITION OF THEOBROMINE, a 



a Ann. der Chem. und Pharm., XLI., 125. 



