CHINOLINE AND ITS HOMOLOGUES,. 389 
salt is previously moistened with hydrochloric acid, it may be ignited without 
explosion, and the green oxide estimated with accuracy. The combustion was 
made with oxide of copper. 
6:827 aie of bichromate of chinoline, dried at 212° gave 
I. < 11-284 carbonic acid, and 
water. 
ll 6-381 bichromate of chinoline, dried at 212°, gave, on ignition, 
F 2°072 green oxide of chromium, 
lr 5534 bichromate of chinoline, dried at 212°, gave, on ignition, 
; 1:787 green oxide of chromium. 
Experiment. Calculation. 
_——* eee 
I. I. ul. 
Carbon, 45-08 a 45-11 Ci. 108 
Hydrogen, 3°49 3°34 H, 8 
Nitrogen, oh bo 5°85 N 14 
Chromium, 22:40 22:28 22°31 Cr, 53:4 
Oxygen, ae 5 23°39 0, 56:0 
100-00 239°4 
Density of the Vapour of Chinoline.—In Dr Hormann’s paper on the coal bases, 
he states that a determination of the density of the vapour of leukol (chinoline) 
failed, owing to its leaving a yellow residue on distillation. I have not found this 
circumstance to operate sufficiently in the case of chinoline from cinchonine, to 
cause more error than is usually found in determining the vapour densities of 
bodies obtained by fractional distillation, and having so high a boiling point. The 
specimen used, boiled in the fourteenth rectification between 460° and 470° F. 
Temperature of air, 
vapour, . 
Pressure, a 
Capacity of balloon, 
Residual air, 
Excess of weight of balloon, 
The formula 
= C,,H,N 
requires 
‘ 18 volumes carbon vapour, 
14... ~~ hydrogen, 
2 nitrogen, 
Experiment. 
4:5190 
VOL. XXI. PART III. 
13° centigrade. 
Py ig feo, Pa 
751 millimetres. 
330 cent. cub. 
TW 5) aan 
0-4980 grammes. 
0-829 . 18=14:922 
0:0692 .14= -:9688 
09718. 2= 1:9426 
17:8334 
= 4:4583 
£ 
Theory. 
C,H,N=4 volumes. 
4:4583 
Action of Iodide of Methyl on Chinoline. 
Hydriodate of Methyl-Chinoline—When an excess of iodide of methyl is 
added to chinoline, and the mixture, inclosed in a pressure tube, is heated for 
5N 
