2°880 
CHINOLINE AND ITS HOMOLOGUES. 
399 
carbonic acid, and 
water. ! 
8-374 et platinochloride ethyl-lepidine gave 
I. { 11-667 ; 
II 6°377 platinochloride ethyl-lepidine gave 
“| 1688 .., platinum. 
Ir 4-952 .,. platinochloride ethyl-lepidine gave 
“| 1:317 platinum. 
Experiment. Calculation. 
——_—————— 
I. II. Il. 
Carbon, 38-00 38-14 C,, 144 
Hydrogen, 3:82 3.71 Ee 
Nitrogen, ; 3-71 N 14 
Chlorine, . A 500 pee 28-21 Cl, 106°5 
Platinum, ° 26:47 26°60 26°23 Pt 99 
100-00 377:5 
Density of Vapour of Lepidine.—In my former paper on the chinoline bases, 
I gave 5:14 as the density of the vapour of lepidine, as found by experiment, and 
I was desirous of ascertaining that of the same base, as extracted from coal-tar, 
in order to serve as a comparison. It is remarkable to observe the difference 
which an increment of C, H, has in modifying the power of substances to resist the 
decomposing influence of heat. While, in taking the density of chinoline at 531° F., 
being 71° above its boiling point, the fluid condensed in the balloon was almost 
_ colourless, lepidine after exposure under the same circumstances to only 523° F., 
_ or 28° above its boiling point, had become nearly black; this darkening, caused 
by separation of carbon, prevented me from making the experiment at a tempera- 
ture as much above the boiling point as in the case of chinoline, and the two 
_ sources of error have the effect of making the density come out somewhat too high. 
Temperature of air, 
vapour, 
15° centigrade. 
273° 
755 millimetres. 
331 cent. cub. 
6745 grammes. 
6 cent. cub. 
5:15 
Pressure, . 
Capacity of balloon 
Excess of weight of balloon, 
Residual air, 
Density, 
The formula 
C,, H, N 
_ requires the following numbers :— 
20 volumes carbon vapour, =0°8290 . 20=16°580 
18 hydrogen, =0°0692 .18= 1:2456 
2 .., nitrogen, =0:9713. 2= 1:9426 
19-7682 
=4:94205 
4 
Density of vapour of lepidine Density of vapour of lepidine Theory. 
from cinchonine. from coal. C an H 5 N=4 volumes. 
5:14 5:15 4:94 
