390 MR C. G. WILLIAMS' RESEARCHES ON 



ten minutes to 212°, combination is perfectly effected, a finely crystallized hy- 

 driodate resulting. If this salt, which is perhaps more correctly called iodide of 

 methyl-chinoline-ammonium, is treated in the cold with excess of oxide of silver, 

 a strongly alkaline solution is obtained, containing the hydrated oxide of the am- 

 monium base. The solution possesses little stability ; on heating with potash, 

 an excessively pungent odour is evolved, acting strongly on the eyes and mucous 

 membrane of the nose. The solution reddens turmeric paper as powerfully as 

 solution of caustic potash, and instantly restores the colour of reddened litmus. 

 The reactions of this base, generally, are the same as those of the ethyl compound 

 next to be described. The smell of a volatile base, a product of the decomposi- 

 tion of methyl-chinoline, is evolved from the moment of its formation ; it appears 

 to be methylamine. 



By alternate precipitation of the hydriodate by nitrate of silver, hydrochloric 

 acid, and bichloride of platinum, after removal of the chloride of silver, a sparingly 

 soluble platinum salt was obtained. The following is the result of its ana- 

 lysis : — 



8-930 grains of platinocliloride of methyl- chinoline, gave 



I. 1 11-350 





carbonic acid, and 











( 2-496 



. . . 



water. 











( 8-515 

 II. { 10-777 





platinocliloride of 

 carbonic acid, and 



methyl-chinoline 



gave 







( 2-303 





water. 











III [ 7 " 861 

 lLLm [ 2-217 



... 



platinocliloride of 



methyl-chinoline 



gave 









platinum. 











f 5-165 

 1V< { 1-456 





platinocliloride of 

 platinum. 



methyl- chinoline 



gave 









Expei 

 II. 



iment. 



Mean. 





Calculation. 





I. 



III. IV. 









Carbon, 34-66 3452 



... ... 



34-59 



34-33 



^20 



120 



Hydrogen, 3-11 



Nitrogen, 



Chlorine, 



3-00 



... 



3-06 



2-86 



4-01 



30-47 



H 10 



N 



C1 3 



10 

 14 



106-5 



Platinum, 





28-20 28-19 



28-20 



28-33 



Pt 



99 



100-00 349-5 



Methyl-chinoline is, therefore, isomeric with lepidine, but has no other point 

 of resemblance. The decompositions of the hydriodate almost exactly resemble 

 those of the ethyl base, and, as the atomic weight of the latter, being higher, gave 

 it an advantage for experiment, I selected it for the purpose. 



Action of Iodide of Ethyl on Chinoline. 



Hydriodate of Eiliyl-Chinoline. — No action takes place on the mere addition 

 of excess of iodide of ethyl to chinoline, but if the tube containing the mixture be 

 sealed and exposed for some hours to a temperature of 212°, the whole becomes a 



