BS An Account of some Experiments on the 



The horn lead that I have analvsed was made by the de- 

 composition oF the nitrat of lead by muriatic acid, and it 

 was well washed, dried, and fused in a glass lube with a 

 small orifice. The strongest red heat that I could apply to 

 it, under these circunistaaces, did not occasion its sublima- 

 tion. 



Fifty grains of it that had been fused were dissolved in 

 water. This solution, heated with nitrat of silver, afforded 

 52-65 grains of dry horn silver. Hence 100 of horn lead 

 appear to be composed of 



25*78 chlorine 

 74-22 lead 



100 00 



As this compound, when decomposed by an alkali, af- 

 fords the protoxide of lead, it may be called plumbane. 



The butter of zinc I have examined was obtained by 

 evaporating to dryness the muriat of this metal, and by 

 heating to redness the residue in a glass tube. This com- 

 pound i^ not volatile at a strong red heat in a close vessel, it 

 fuses before it acquires a dull red heat, and on cooling it 

 goes through severnl degrees of consistency, being viscid 

 before it becomes solid. 



This compound, when heated with water, affords a small 

 residue of oxide of zinc, which, as in the preceding in- 

 stances, may be considered as in the state of mechanical 

 mixture. 



In consequence of its powerful attraction for water, it is 

 a very deliquescent substance ; on this account it is neces- 

 sary to weigh it in water to avoid error. 49'5 grains of it 

 thus weighed, dissolved entirely in water, with the ex- 

 ception of one grain of oxide of zinc, which was separated 

 by decantation and dried and ignited, and its quantity as- 

 certained to be as stated. The soluiion precipitated by 

 nitrat of silver afforded 99 grains of dried horn silver. 

 Hence, excludin;^' the one grain of oxide, 100 of butter of 

 zinc seem to consist of 



50 chlorine 

 50 zinc 



100 



This compound mav be called zincane. 



A compound of chlorine and arsenic has been long 



known, bearing the name of the faming liquor of arsenic. 



It may be formed in several waysj by the combustion of 



arsenic in chlorine gas, by heating in a retort a mixture of 



arsenic 



