DESTRUCTIVE DISTILLATION OF ANIMAL SUBSTANCES. 223 
> 
ig 
% 
6°345  ... carbonic acid, and 
6018 grains of platinochloride of collidine gave 
I. 
TOR ipa aie) WALCES - 
5-040 grains of platinochloride of collidine gave 
TI.’ 5:360 ... carbonic acid, and 
1650 ... water. 
I 5-620 grains of platinochloride of collidine gave 
"11-705 =~... ~—— platinum, 
Il 4-535 grains of platinochloride of collidine gave 
“1 1:362 ... platinum. 
lr 5097 grains of platinochloride of collidine gave 
“(1-657 ... ~~ platinum. 
Experiment. Calculation. 
S00 SSS oe 
I. 1. ul. 
oe Carbon, . . 2877 29:00 . BOB. iC. 96 
/_ Hydrogen, . : 3:57 3°63 te 3-66 H 12 
Nitrogen, ‘ é ooo ot mh 4°31 N 14 
Chlorine, . 2s: i < 3254 Cl, 1065 
Platinum, . < 30°33 30°03 29-89 30°16 Pt 98-7 
100-00 327-2 
These results correspond with the formula C,, H,, N HCl PtCl, and entirely con- 
firm the constitution of the base. The rest of its salts have not been particularly 
examined, as they did not present anything of interest. 
Constitution of the Bases of the Picoline Series. 
Having in this and the previous part of these researches, accumulated sufficient 
evidence of the existence of a class of bases isomeric with that of which aniline is 
the type, it became important to determine to which of the three classes of volatile 
bases they belong. For this purpose, pyridine, picoline, and collidine, were sub- 
mitted to the action of iodide of ethyl. The experiments were carried out in 
considerable detail with picoline, but with the other two salts, no more was done 
than sufficed to substantiate the fact, that iodide of ethyl acted on them in a 
similar manner. 
Action of Iodide of Ethyl on Picoline. * 
Anhydrous picoline and iodide of ethyl were mixed, in the proportion of one 
volume of the former to two of the latter, and sealed hermetically in a combustion 
tube. The two fluids mix readily, but if the tube containing them be gently 
heated, by plunging it for the space of halfa minute into the water-bath an action 
takes place, attended with the evolution of much heat, the fluid becomes muddy, 
and separates into a thick oily stratum, which rises\to the surface, and a more 
fluid one, which descends. On cooling, the former solidifies into a highly crystal- 
_ line mass, and well-formed crystals appear in the latter, which consists of the 
_ excess of iodide of ethyl. Even without the application of heat, the action takes 
VOL. XXI. PART I. 30 
