OF LIQUIDS IN VAPOUR. 3 



the greatefl part of the acid came over in red vapours, 

 which were imbibed by water, that afterwards gave out 

 nitrous air. The metal was covered with a white pow- 

 dery fubftance, but in feme places yellow, the nitrated 

 calx of bifmuth. The liquor that was diftilled was of 

 a blue colour, and the veflel in whicli it was received, 

 was filled with red vapours. 



Sending the vapour of marine, acid over a quantity of 

 copper, I got about 40 ounce meafures of air, the greatell 

 part of which was ftrongly inflammable, but mixed with 

 common air. For when, after being turbid, it became 

 clear, and the produdlion flow, the flandard of the air 

 was 1.45. 



I then fent the vapour of this acid through an empty 

 earthen tube glazed on the outfide only, and got about 

 60 ounce meafures of air of the fl:andard of 1.4, or 1.35 

 very turbid. The refult was the fame when the tube 

 was glazed both infide and outfide. This air I fufpedt 

 had been tranfmitted through the tube, while the vapour 

 of the acid pafl'ed through in the contrary diredion. 



With this acid vapour fent over 1 o dwts. of perfect 

 charcoal I got about 700 ounce meafures of air, without 

 any fenfible quantity of fixed air ; but afterwards one 

 tenth of the produce was fixed air, and the reft inflammable, 

 of which 20 ounce meafures weighed two grains lefs 

 than the fame quantity of common air. This air came 

 over white as milk, and the acid that was diftilled was 

 quite black. 



1 feveral times fent caiijlic fixed alkali in vapour 

 through an earthen tube containing iron^ when the firft 

 portion that was diftilled was flightly acid, but not after- 

 wards. I had the fame refult in three procefles, in which 

 the glafs worm, and all the apparatus, had remained juft 

 as it was after the preceding experiments ; fo that nothing 

 acid could well have come to it. 



A 2 Experiments 



