

Ml 



to 



- 



Anahfis of the Air. 1 9 1 



when a cubick inch of fpirit of nitre was 

 poured on it, diffolve in i or 3 hours, with 

 a large froth, and generated 48 cubick inches 

 of Air, none of which loft its elafticity, tho' 

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

 34.) And a like quantity of Tartar being 

 mixed with fpirit of nitre, was in the fame 

 time diffolved, 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 diffolved by oil of 

 Vitriol ; the like pieces of Tartar and Calcu- 

 lus were diffolved 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' 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 per deliquium, and had conlequently 

 no Sal Tartar in it 5 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 



