Anatyfts of the Air. 191 



when a cubick inch of fpirit of nitre was 

 poured on it, diffolvc in 2 or 3 hours, with 

 a large froth, and generated 48 cubick inches 

 of Air, none of which loft its elasticity, tho* 

 it flood many days in the glafs veflfel. (Fig. 

 34.) And a like quantity of Tartar being 

 mixed with fpirit of nitre, was in the fame 

 time diflblved, but no elaftick Air was ge- 

 nerated, notwithstanding Tartar abounds fo 

 much with Air. 



Small pieces of Tartar and Calculus were 

 in 12 or 14 days both diflblved by oil of 

 Vitriol 3 the like pieces of Tartar and Calcu- 

 lus were diflblved in a few hours by oil of 

 Vitriol, into which there was gradually 

 poured near an equal quantity of fpirit of 

 Harts-horn, made with Lime, which caufed 

 a confiderable ebullition and heat. 



Tho J the remaining calx of the diftillation 

 of Tartar ', in Exper. 73. run per deliquium, 

 and had therefore Sal Tartar in it ; and 

 tho' the calx of the diftilled Calculus did 

 not run^r deliquium, and had confequently 

 no Sal Tartar in its yet it cannot thence 

 be inferred, that the Calculus is not a tar- 

 tarine fubftance : Becaufe by Exper. 74. it 

 is evident, that Sal Tartar it felf, when 

 z mixed 



