180 RELATION OF CAFFEINE, ASPARAGINE, 



of water, can yield taurine, the nitrogenised com- 

 pound peculiar to bile : 



1 at. caffeine or theine = CgNsHs 0-2 



9 at. water = Hg Og 



9 at. oxygen = Og 



C8N2H14O20 = 

 = 2 at. taurine = 2 (C4NH7O10) 



A similar relation exists in the case of the pecu- 

 liar principle of asparagus and of althaea, asparagine; 

 which also, by the addition of oxygen and the 

 elements of water, yields the elements of taurine : 



1 at. asparagine = CgNgHg Oq 



6 at. water = Hg Og 



8 at. oxj^gen ... = Og 



= 2 at. taurine = 2 (C4NH7O10) 



The addition of the elements of water and of a 

 certain quantity of oxygen to the elements of theo- 

 bromine, the characteristic princij^le of the cacao 

 bean (theobroma cacao), yields the elements of 

 taurine and urea, of taurine, carbonic acid, and 

 ammonia, or of taurine and uric acid : 



1 at. theobromine Ci8N6Hio04 ^ f. ^ . - n xt u r^ 



22 at. water H,AJ,=r n^^^^^ 



■ f 1 1 at. urea . . . C^ N2H, O.. 

 16 at. oxygen ... OigJ L 



^IS'^e-n. 32^42 ^IS-'^ 6^32042 



or — 

 1 at. theobromine CigNg H10O4 1 C4 at. taurine C16N4 H28O40 



24 at. water H24O24 > = s 2 at. carb . acid C2 O4 



16 at. oxygen OiJ l2 at. ammonia N2 Hg 



*-6 



C,sNgH34 O44 CisNg H34O44 



