E 236 J 



tfirougji the water. They made, however, a conti- 

 nual,, though flow, increafe of inflammable air. 



Fixed air, being admitted to the whole produce of 

 this air from copper,, had no fenfible effect upon it. 

 Upon the admiffion of water, a great part of the 

 mixture, which* no doubt, was the moft fubtle 

 kind of air from the copper, prefently difappeared y 

 another part, which I fuppofe to have been the fixed 

 air, was abforbed flowly ; and in. this particular cafe- 

 the very fmall permanent refiduum did not take fire & 

 but it is very poflible that it might have done fo, if 

 the quantity had been greater. 



Lime-water being admitted to the whole produce 

 of air from copper became white; but this I fufpect 

 to have arifen from fome other circumftance than the 

 precipitation of the lime which it contained.. 



The folution of lead in the marine acid is attended ■. 

 with the very fame phenomena as the folution of 

 copper in the fame acid; about three fourths of the 

 generated air difappearing on the contact of water^ 

 and the remainder being inflammable. 



The folutionsof iron, tin, and zinc, in the marine, 

 acid, were all attended with the fame phenomena as 

 the folutions of copper and lead, but in a lefs degree 5 

 for in iron one eighth,, in tin one fixth, and in zinc 

 one tenth of the generated air difappeared on the con- 

 tact with water. The remainder of the air from 

 iron, in this cafe, burned with a green, or very light 

 blue flame. 



I had always thought it fomething extraordinary 

 that a fpecies of air mould lofe its elafticity by the 

 mere contact of any thing, and from the firft fuf- 

 pected that it mud have been imbibed by the water 



that 



