DESTRUCTIVE DISTILLATION OF ANIMAL SUBSTANCES. 223 



{6-013 grains of platinochloride of collidine gave 

 6-345 ... carbonic acid, and 

 1-937 ... water. 



{5-040 grains of platinochloride of collidine gave 

 5-360 ... carbonic acid, and 

 1-650 ... water. 



| 5-620 grains of platinochloride of collidine gave 



(5- 



\ 1-705 ... platinum, 



f 4-535 grains of platinochloride of collidine gave 





XX 



{ 1-362 



platinum. 













III. 



f 5-097 grains 

 { 1-657 ... 



of platinochloride of collidine gave 









platinum. 

















Experiment. 





Calculation. 







i. 



II. 



in. 



y '"■- — 







Carbon, 





28-77 



29-00 





29-33 



c 1G 



96 



Hydrogen, 





3-57 



3-63 



... 



3-66 



H 12 



12 



Nitrogen, 





. 







4-31 



N 



14 



Chlorine, 





• • • • 







32-54 



Cl 3 



106-5 



Platinum, 





30-33 



30-03 



29-89 



30-16 



Pt 



98-7 



100-00 327-2 



These results correspond with the formula C 16 H lt N HC1 PtCl 2 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 half a 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 1. 3 



