1891 - 92 .] Dr Griffiths on Ptomaines extracted from Urine. 101 
This ptomaine is therefore related to creatine as well as 
guanidine, and is most likely propylglycocyamine : — 
HN = 
This ptomaine is poisonous. When administered to a cat it 
produced nervous excitement, cessation of the salivary flow, con- 
vulsions, and death. 
The three ptomaines described in this paper do not occur in 
normal urines ; they are, therefore, produced within the body during 
the courses of the diseases. 
