460 '»' Dr. Anderson on the Products of the' > a 



of another base, in order to obtain which the fluid was slowly 

 evaporated, allowed to cool at intervals, and the sal-ammoniac 

 which deposited was separated by straining through cloth and 

 expression. After the separation of several crops of crystals, a 

 dark- brown mother-liquor was left, which refused to crystallize 

 by evaporation on the water-bath, but on cooling solidified into 

 a mass of long foliated crystals, which soon deliquesced in moist 

 air. These crystals still contained traces of sal-ammoniac, for 

 the separation of which they were evaporated to complete dry- 

 ness on the water-bath, and dissolved in the smallest possible 

 quantity of absolute alcohol, with the aid of heat. The filtered 

 fluid, on cooling, deposited a few tabular crystals mixed with a 

 little sal-ammoniac, which was got rid of by a second filtration ; 

 and the filtrate, when treated with animal charcoal and further 

 concentrated, solidified, on cooling, into a mass of large foliated 

 ciystals. , 



These ciystals are long, transparent, and colourless plates, 

 entirely without odour, and with a pungent and bitter taste. 

 In moist air they deliquesce rapidly. Solid potash added to 

 their concentrated solution causes the immediate escape of a 

 gaseous base resembling ammonia, but distinguished by its 

 peculiar putrid odour. This gas dissolves readily in water, and 

 gives a powerfully alkaline solution. It gives with corrosive 

 sublimate a fine white precipitate, soluble in hot water or spirit, 

 and deposited on cooling in fine silvery plates ; and its hydro- 

 chlorate gives, with bichloride of platinum, a soluble salt, depo- 

 siting from its hot saturated solutions in beautiful golden-yellow 

 scales. I selected this salt as a means of determining the con- 

 stitution of its base. 



I. 6-885 grs. of the platinochloride, dried at 212°, gave 1-243 

 carbonic acid and 1'648 water. 



II. 6*189 grs. of the salt gave 2*565 platinum. 



III. 11 '531 grs. of another preparation gave 4*764 platinum. 



Experiment. 



Carbon . 4*92 ! .Ji 



Hydrogen . 2*67 



Nitrogen . 



Chlorine . 



Platinum . '4J'81 41-44 



'''*'" 100^00 237-2 



These analyses, then, correspond exactly with the formula 

 C^ H^ N, IICl, Pt CP ; and the base is consequently methylamine, 

 with which it and its salts agree in all respects. 



The oily bases which had been separated from their solution 



