2l8 



Analyfis of the Air. ' 



ith Of a cubick inch of filings of l ron 

 and a cubick inch of Limon juice, abforbed 

 two cubick inches of air. 



It is remarkable, that the fame mixtures 

 mould change from generating to abforbing, 

 and from abforbing to generating ftatcs°i 

 fometimes with, and fomctimes without any 

 fenfible alteration of the temperature of the 

 air. 



Experiment XCV. 



Half a cubick inch of fpirits of Harts- 

 horn, with filings of Iron abforbed i -\- 4 

 cubick inches of air, with filings of Copper 

 double that quantity of air, and made a 

 very deep blue tinclure, which it retained 

 long, when expofed to the open air. It was 

 the fame with Jpirit of Sal Ammoniac, and 

 filings of Copper. 



A quarter of a cubick inch of filings of 

 Iron, with a cubick inch of powdered Brim- 

 ftone, made into a parte with a little water, 

 abforbed 1 9 cubick inches of air in two days. 

 N. B. I poured hot water into the ciftern x x, 

 (Fig. 34.) to promote the ferment. 



A like 



f 



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r Or 



. 



■BO ■ 



in. 





