314 



APPENDIX. 



NOTE XLI. P. 168. 



COMPOSITION OF MORPHIA. a 

 Liebig.* Regnault. 



Carbon . . 72-340 72-87 



Hydrogen . 6-366 6-86 



Nitrogen . 4-995 5-01 



Oxygen . . 16-299 15-26 



Calculated 



, C 35 H 20 NOe 



72-41 7227 



6-84 6-73 



5-01 4-78 



15-74 16-22 



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



NOTE XLII. P. 168. 



COMPOSITION OF CAFFEINE, THEINE, GUARANINE, 

 THEOBROMINE, AND ASPARAGINE. 



Caffeine.a Theine.J Guaranine.c Calculated 



Pfaff and Liebig.* Jobst. Martiua. 



Carbon . . 49-77 50-101 49679 



Hydrogen . 5-33 5-214 5-139 



Nitrogen . . 28-78 29-009 29-180 



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



C 8 H 6 N 2 2 



49-798 



5-082 



28-832 



16-288 



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



b Do. XXV., 63. 



c Do. XXVI., 95. 



Guaranine is the name given to the crystallized prin- 

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

 identical with caffeine and theine, as the above analyses 

 demonstrate. 



COMPOSITION OF THEOBROMINE. a 



Woskroseusky. Calculated C 9 H 6 N 3 O 2 



46-44 

 4-20 

 35-85 

 13-50 

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



