52 
DR. JOHN STENHOUSE ON THE NITROGENATED PRINCIPLES OF 
IOC 750*0 
74*98 
I. 
74*60 
II. 
74*78 
6 H 75*0 
7*49 
8*18 
7-77 
1 N 175*2 
17-53 
1000*0 
100*00 
When the anhydrous base combined with muriatic acid much heat was evolved. The 
muriate was very soluble in w'ater, but when sufficiently concentrated it crystallized 
in slender prisms. With sulphuric and nitric acids the base also formed similar 
compounds. The platinum double salt was readily procured by adding bichloride of 
platinum to a pretty concentrated solution of the base in muriatic acid. This salt 
crystallized in four-sided prisms, arranged in stars of a deep yellow colour. It was 
rather less soluble in water than the corresponding ammoniacal compound. It was 
purified by a second crystallization out of water, which freed it from a little resinous 
matter it was apt to contain at the first. The formula of this salt was CioHgN, 
HCl, PtCl 2 , and the calculated quantity of platinum 34*50 per cent. 
I. 0*7314 grm. salt, dried in vacuo, gave 0*254 Pl = 34*72 per cent. 
II. 0*3150 grm. salt gave 0*109 Pl= 34*60 per cent. 
When chloride of gold was added to a solution of this base in muriatic acid, a 
double salt was immediately formed. It crystallized very readily in pale yellow 
needles, which were very soluble in hot water, and were again deposited on the 
cooling of the liquid. 
It is evident that this base, the probable formula of which is C^q Hg N, approaches 
very closely in its composition to nicotine, and in its characters to picoline, the base 
discovered by Dr. Anderson in coal-tar. The formula of nicotine isC^gHy N. The 
boiling-point of the new base is higher than that of picoline, and its solubility in 
water is much less. Dr. Anderson says that picoline is soluble in water in every 
proportion, while this base requires at least six or seven times its bulk of water to 
dissolve it. The new base was lighter than water. Its smell was peculiar and 
slightly aromatic. Its taste was hot, reminding one of peppermint. It dissolved in 
every proportion, both in alcohol and in ether. It remained colourless, though kept 
in an imperfectly stoppered bottle, if not exposed to a strong light. It caught fire 
readily, and burnt with a bright smoky flame. 
In order to obtain an approximative idea of the per-centage composition of the other 
bases with which this was accompanied, three of them were subjected to analysis. 
I. 0*2632 grm. of the base, or not improbably mixture of bases, boiling between 
160° and 165° C., gave 0*715 carbonic acid and 0*191 water. 
II. 0*239 grm. of the liquid, boiling between 165° and 170° C., gave 0*661 carbonic 
acid and 0*1835 water. 
III. 0*197 grm., boiling between 200° and 210° C., gave 0*547 Co^ and 0*155 water. 
I. II. III. 
C 74*08 75*42 75*63 
H 8*06 8*52 8*73 
