310 Mr. Williams — Researches on Isomeric Alkaloids. [June 16 



they weighed 816 miUigrammes. On analysis they yielded numbers 

 agreeing with the formula 



C^H^ 'N,HC1, PdCl. 

 Exposed for along time to a heat of 100°, they become decomposed, 

 one equivalent of hydrochloric acid being expelled from two equivalents of 

 the salt. This was proved by analysis of the substance after leaving for 

 five days, until in fact its weight became constant. The numbers obtained 

 agreed with the formula 



CU U19 ^2 p^2^ Q7 JJO../ JJ^J PdClH" " N Pd, CI. 



Chloride of Palladio-(j-lutidyl Ammonium. — The author has succeeded in 

 isolating the palladium base existing in the last substance. It is easily 

 procured by acting on chloride of palladium in solution with /3-lutidine. 

 It is not readily soluble, and therefore precipitates at once. On analysis it 

 gave numbers almost exactly agreeing with the formula 



n{c'h;"|ci. 



II. Lutidine. An exactly similar mixture of hydrochlorate of lutidine 

 and chloride of palladium was made to the one in which /3-lutidine was 

 employed. No crystals, however, were obtained by the time that the con- 

 tents of the vessel containing the /3-lutidine had nearly solidified. After a 

 month's repose, only 232 milligrammes had formed, instead of 816, as in 

 the other experiment. 



Comparative Experiments on (^-Lutidine and Lutidine with Trichloride of 



Gold. 



I. (j-Lutidine. — A mixture of the hydrochlorate of the base and solution 

 of trichloride of gold became nearly solid. On heating, a portion dissolved, 

 and on filtration and cooling, gave a beautifully crystalline salt a. A large 

 portion, however, melted to a dark oil, which dissolved in boiling dilute 

 hydrochloric acid. On cooling, the salt was deposited in crystals b. Both 

 portions on analysis gave numbers agreeing with the formula 



C^H^ ' N, HCl, AuCP. 



II. Lutidine. — A similar experiment was made. The precipitate only 

 occupied half the bulk of the liquid ; it did not require one-fourth part of 

 the quantity of water to dissolve it that was necessary in the case of the 

 /3-lutidine. 



The author in his paper gives the results of experiments made with the 

 five bases and solution of trichloride of gold. The differences are fully as 

 great as those observed with the hydrochlorates. 



Action of Iodide of Ethyl on (^-Lutidine and Lutidine. 

 T. (^'Lutidine. — One volume of the base was mixed with two volumes of 

 iodide of ethyl. The mixture was heated in a sealed tube for three 

 minutes to a temperature of 94°. On removing the tube from the water- 



