538 



Mr. C. G.- Williams. 



[Mar. 17, 



the numbers obtained, but they do not appear to me so readily admis- 

 sible. For instance, a substance having the formula — 



2(C 18 H 1 ^2)PtCr i , 



would require 23*13 per cent, of platinum, which would agree with 

 the amount of metal obtained from the second precipitate, but the 

 formation of such a substance in the presence of free hydrochloric acid 

 appears most unlikely. Nevertheless, it is remarkable that the platinum 

 salts obtained from the products of the action of sodium on chinoline 

 and /3-futidine, often agree in their percentages of platinum with 

 substances having formula? of the polymerised bases united directly to 

 platinic chloride. 



Action of Sodium Amalgam on Ghinoline. 



25 grms. of chinoline and 20 grms. of sodium amalgam containing 

 10 per cent, of sodium were mixed. The action commenced in the 

 cold, and red streaks appeared where the base and the amalgam were 

 in contact. When the action ceased in the cold, the mixture was 

 warmed on the water-bath ; the reaction started again immediately r 

 and. the whole became of a deep red colour. No gas was given off. 

 The next day the mixture had assumed the consistence of thick treacle ; 

 when heated on the water-bath it softened, but the amalgam remained 

 hard ; the fluid had turned from purplish red to yellow, but reddish 

 streaks were still formed on stirring, showing that the reaction was 

 not complete. ~ At this stage 5 grms. more amalgam were added. After 

 four or five hours of constant stirring on the water-bath the red streaks 

 ceased to appear, and the whole became a greenish yellow oil, the greater 

 portion of which was poured off, and the residue containing much 

 undecomposed amalgam was treated with hot water. The amalgam 

 decomposed with violence, and when the action was over excess of 

 hydrochloric acid was added, and the solution was boiled and filtered. 

 Three liquors were taken off and kept separate from each other, each 

 solution gave on cooling crystals of the hydrochlorate of dichinoline ;. 

 they were in the form of needles of so brilliant a scarlet that, on com- 

 parison with a sample of the finest vermillion, the latter looked brown 

 by contrast with them. The first soluMon yielded 1*1 grams of air- 

 dried product, the second 0*4, and the third 0"25, in all 1*75 grms. 

 from 25 grms. of chinoline. The scarlet crystals bleach on exposure 

 to light and become pale brown on drying in the water-oven, and the 

 brown colour itself rapidly bleaches on exposure to light. 



The mother-liquors of the scarlet crystals on evaporation to a quarter 

 of their original bulk, deposited, a pale yellow precipitate too small for 

 analysis ; it was nearly insoluble in cold water. 



The mother-liquors affording no further crystals on evaporation, 

 were treated with excess of potash to enable the chinoline to be- 



