jg COMBINATIONS OF OXIMURIATIC ACID AND METALS, 



odour to n;e not unlike that of artificial camphor. The 

 action of the liquor of Libuvius on the oil of turpentine is 

 worthy oi farther inquiry. The preceding account of it, I 

 am aware, is very incomplete; but I trust it will serve to call 

 the attention of chemists to a subject so curious. 

 Analysis of the To discover the proportions of tin, and consequently of 

 Isi compound, chlorine, in stannane and stannanea, I have taken advantage 

 of the superior affinity of zinc for chlorine, by means of 

 which the tin is separated in its metallic state. 



69*5 grains of stannane, made by heating in a glass tube 

 with a very small orifice an amalgam of tin with calomel, 

 were, with the exception of two grains of metallic mercury, 

 apparently a mere mechanical mixture, entirely dissolved in 

 dilute muriatic acid. A slip of clean zinc, immersed in this 

 solution decanted from the residual mercury, quickly pre- 

 cipitated the tin in a very beautiful plumose form ; and this 

 precipitate collected on a filter, and well washed, and dried, 

 and fused into one globule under a cover of tallow in a small 

 glass tube, weighed 42 grains. 



As therefore GjS grains of stannane contain 49 grains of 

 tin, 100 appear to consist of 



62-22 tin 

 ) 3778 chlorine 



100- 



the 2(1. 



Analysis of As stannanea is extremely volatile, it is difficult to weigh 



it with perfect accuracy. The mode I adopted was to pour 

 it into a bottle half full of water, the weight of which was 

 previously ascertained, and to infer the quantity added by 

 the increase of weight, 



81-75 grains of stannanea thus weighed in water, aiforded 

 when decomposed by zinc 34 grains of tin*. 



• A little muriatic acid was added before the rinc was introduced, 

 to dissolve the oxide of zinc, 'Ahich, in other sioiilir experiments, I 

 observed was rapidly formed, and which, ftom the larje quantity of 

 fcidrogen evolved, appeared to be owing to the decomposition of water, 

 chiefly in cousequeuce of the galvanic effect of ibe contact of the tw» 

 diflxrent nictale, rinc and tin, 



Heoce 



