CHINOLINE AND ITS HOMOLOGUES. 391 
mass of crystals. When this is the case, and the tube cools, the end may be cut 
off, a tube bent twice at right angles attached by means ofa cork, and, the pressure- 
tube being immersed in the water-bath, the excess of iodide of ethyl distilled 
over. The crystals are then dissolved out in a small quantity of hot alcohol, and 
the solution allowed to cool. The first crop is of a rich yellow colour, becoming 
of a pale lemon tint on recrystallization. In the state in which the salt is thus 
obtained it possesses the property of becoming a deep blood-red at 212°, and regain- 
ing its normal tint on cooling; this peculiarity becomes much lessened by a re- 
petition of the process. The crystals appear to be cubic, and are easily obtained 
of considerable size. They dissolve more readily in water than alcohol, but the 
latter is the best solvent for the purposes of crystallization. 
10-810 carbonic acid, and 
6-336 grains of hydriodate of ethyl-chinoline, dried at 212°, gave 
I. 5a0 
2513... —- water. 
ra 6-684 hydriodate of ethyl-chinoline, dried at 212°, gave 
3 5-457 ~~... —_ iodide of silver. 
Experiment, Calculation. 
a 
I. IL. 
Carbon, é . 46:53 ie 46°32 Cay 132 
Hydrogen, 4:41 ne 4:21 HH, 12 
Nitrogen, ; Bele ete 4:91 N 14 
Todine 5 : fe 44:12 44-56 I 127 
100-00 285 
Platinum Salt of Ethyl-Chinoline.—After adding nitrate of silver to a solution 
of hydriodate of ethyl-chinoline, as in making the iodine determination last men- 
tioned, the excess of silver was removed by the addition of hydrochloric acid, the 
_ liquid filtered, and evaporated to a moderate bulk, on the addition of bichloride of 
_ platinum, a rich golden-yellow precipitate of sparing solubility was obtained; it 
__ Was first washed with a little water, and afterwards with alcohol. 
% 6-813 grains of platinochloride of ethyl-chinoline gave 
was 1:847 platinum. 
4 Agreeing with the formula 
4 C,, H,, N, H Cl + Pt Cl,. 
Experiment. Calculation. 
Carbon, 36°31 C,, 132 
Hydrogen, 3°30 H,, 12 
Nitrogen, . 3°85 N 14 
Chlorine, . ae 29°30 Cl, 106°5 
Platinum, . 27:11 27°24 Pt 99 
100:00 3635 
