Analyfis of the Air. 307 



of the fumes as in the firft cafe \ becaufc here 

 the fulphurcous fumes were much blended 

 with watry vapours : For we find in Experi- 

 ment 97> that fix times more was wafted in 

 fames in this calcthan in the other; and there- 

 fore probably a good pan of the cubick inch of 

 water afcended with the vapour, and might 

 thereby weaken its abforbing power : For 

 watry vapours do not abforb elaftick air 

 as the fulphureous ones do ; tho' by Experi- 

 ment 1 20 ,a Candle abforbed more in a damp 

 than in a dry air. 



And 'tis from thefe diluting watry vapours 

 that filings of Iron with Spirit of Nitre and 

 Water, abforbed lefs than with Spirit of Nitre 

 alone, for in both cafes it abforbs more than 

 it generates. 



Thus alio oil of Vitriol and Chalk ge- 

 nerate air, their fume being fmall, and that 

 much diluted with the watry vapours in the 

 Chalk. 



But Lime with oil of Vitriol, or White- 

 Wine Vinegar or Water, make a confiderable 

 fume, and ablbrb good quantities of air: 

 Lime alone left to flaken gradually, as it 



makes no fume, fo it abforbs no air. 

 We fee in Experiment 92, where the fer- 



X 2 ment 







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1 





