220 BACTERIAL POISON'S. 



it is dissolved in greater or less quantity, and hence can be 

 obtained by the Stas-Otto as well as by the Dragen- 

 DORFF method. The crystals resemble urea in form. On 

 heating very cautiously the salt sublimes, and at the same 

 time appears to undergo a partial internal decomposition, 

 inasmuch as many of the groups of needles in the sublimate 

 are colored red or blue. For the behavior of the hydro- 

 chloride with the alkaloidal reagents, see Table I. 



Pure neuridine is not poisonous, but as long as it is 

 contaminated with other putrefaction products it possesses a 

 toxic action similar to that of peptotoxine. This holds 

 true for the other non-poisonous bases. 



The Platinochloride, C5H,^N2.2HCl.PtC]4, crystal- 

 lizes in beautiful flat needles. Recrystallized from hot 

 water, it forms aggregations of small, clear, yellow needles. 

 It is readily soluble in water, from which it is precipitated 

 on the addition of alcohol. 



The AuROCHLORiDE, C5Hj^N'2.2HC1.2AuCl3, is rather 

 difficultly soluble in cold water (Bocklisch), and crystal- 

 lizes on cooling of the hot, saturated solution in bunches of 

 clear, yellow, short needles. 



The PiCRATE, C5Hj,N2.2CeH,(I^02)30H, can be recrys- 

 tallized from boiling water, in which it is very difficultly 

 soluble, in the form of needles united in plumose groups. 

 It is almost insoluble in cold water ; less difficultly soluble 

 in alcohol. It is not fusible, but begins to brown and 

 give off yellow vapors at 230°, and carbonizes completely 

 at 250°. 



Saprine, C5Hj^N2, was found in human livers and 

 spleens after three weeks' putrefaction (Brieger, II., 30, 

 46, 58). It occurs together with cadaverine, putrescine, 

 and mydaleine in the mercuric chloride precipitate. To 

 separate these bases, Brieger (1885) used the following 

 process : The mercury salts were decomposed with hydrogen 

 sulphide, the filtrate evaporated to dryness, and the residue 

 then extracted with alcohol. The putrescine hydrochloride 

 is insoluble in alcohol, and is thus removed. The alcoholic 

 solution was treated with platinum chloride, which precipi- 



