CHEMISTRY OF THE PTOMAINES. 193 



With picric acid it yields yellow needles which are but 

 slightly soluble in cold water. 



PROPYLAMINE, C S H 7 .NH,, is isomeric with trimethyl- 

 ainine, and can therefore be easily confounded with that 

 base. There are two propylamines possible represented 

 by the formula CH S .CH 2 .CH 2 .NH 2 and (CH 3 ) 2 .CH.NH 2 . 

 The former, or the normal compound, boils at 47-48, 

 whilst the latter, or iso-propylamine, l>oils at 31.5. Both 

 are liquids possessing an ammoniacal, fish-like odor. They 

 form crystalline salts ; the hydroehlorides melt respectively 

 at 155 -lo8, and at 139.5. 



Iso-propylamine (?) has been found among the distilla- 

 tion products of the vinasse of beet-root molasses. Propyl- 

 amine has been obtained by BRIEGER (1887) from cultures 

 of the bacteria of human feces on gelatin. SCHWANERT 

 has isolated from the organs of a cadaver a basic substance 

 which was said to possess an odor similar to propylamine. 



BUTYLAMINE, C 4 H U N, was obtained by GAUTIER and 

 MOURGUES (1888) in cod-liver oil. It forms a colorless, 

 mobile, alkaline liquid, the boiling-point of which they 

 found to be 86 at 760 mm. It absorbs carbonic acid from 

 the air and readily forms salts. The platinochloride forms 

 golden-yellow plates which are quite soluble. 



In animals it produces an -increase in the function of the 

 skin and kidneys, and in large doses fatigue, stupor, and 

 vomiting. 



ISO-AMYLAMINE, C S H 1S N = (CH 3 ) 2 .CH.CH 2 .CH 2 .NH 2 , 



has been obtained by LIMPRICHT in the distillation of horn 

 with potash ; it also occurs in the putrefaction of yeast 

 (MiiLLER, HESSE, 1857) ; and in cod-liver oil (GAUTIER 

 and MOURGUES, 1888), where it constitutes nearly one- 

 third of the bases present. 



It is a colorless, strongly alkaline liquid, possessing an 

 odor which is not disagreeable. At the ordinary pressure 

 it boils at 97-98. 



The hydrochloride forms deliquescent crystals, which 



