APPENDIX. 



XANTHIN BODIES. 



RELATION OF UREA TO THE C0 2 DERIVATIVES 

 AND THE GY-COMPOUNDS. 



0=C (NH 2 = C (NH 2 



Carbamic Acid. Urea=Carbamid. 



n-rJOH 

 - c ioH 



Carbonic Acid. 



\0-NH 4 



C0 2 + 2NH 3 =CO< 



Carbamate of Ammonia. 



