234 Analy/is of the Air. 



der the receiver, by means of a burning-glafs, 

 which fet fire to a fmall piece of brown pa- 

 per fixed to the wick of a Candle, which 

 paper had been firft dipped in a ftrong folia- 

 tion of Nitre in Water; and when well 

 dried, part of it was dipped in melted Brim- 

 ftone ; it will alfo light the Candle without 

 being dipped in Bnm/ione. Dr. Mayoix, 

 found the bulk of the air leffened by -3— part, 

 but does not mention the fize of the elafs 

 veffel under which he put the lighted Can- 

 dle, T>e Sp. Nitro aereo, p. 10 1. The capa- 

 city of the veffel above z z, in which the 

 Candle burnt in my Experiment, was equal 

 to 2024 cubick inches; and the elafticity of 

 the *£ part of this air was deftroyed. 



The Candle cannot be lighted again in 

 this infected air by a burning-glafs: But if 

 I firft lighted it, and then put it into the 

 fame infected air, tho' it was extinguifhed 

 in y part of the time, that it would burn in 

 the fame veffel, full of frefh air 5 yet it 

 would deftroy the elafticity of near as much 

 air in that fhort time, as it did in five times 

 that fpace of time in frefh air; this I re- 

 peated feveral times, and found the fame 

 event : Kence a grofs air, which is loaded 

 wuh vapours, is more apt in equal times to 



lofe 



