s 



•* 



:. 





tC 



€C 



Anahjfis of the Aiy . 189 



proportion of calx, that the worthy Dr. Slate 

 found remaining, after the drilling and 



calcining two ounces of calculus, "one ounce, 



and three drams of which (he fays) eva- 

 porated in the open fire ( a material cir- 

 « cumftance, which the Chymifts rarely en- 

 " quire after) of which we have no ac- 

 « count." Thilof. TranfacJ. Lowthorfs A- 

 bndgment. Vol. III. p. U9> The greateft 

 part of which was, we fee by the prefent 

 Experiment, raifed into permanently elaf- 



tick Air. 



By comparing this diftillation of the cal- 

 culus with that of Renijh Tartar in Exper. 

 7 3 . we fee that they both afford more Air 

 in diftillation, than any other fubftances : 

 And it is remarkable, that a greater propor- 

 tion of this new raifed Air from thefe two 

 fubftances, is reforbed and lofes its elafti- 

 city, in (landing a few days, than that of any 

 other bodies, which are ftrong fymptoms 

 that the calculus is a true animal Tartar. 

 And as there was very confiderably lefs oil, 

 in the diftillation oiRenipy Tartar y th&n there 

 was in the diftillation cf the Seeds and folid 

 parts of vegetables 5 fo I found that this 

 calculus contained much lefs oil than the 

 blood or folid parts of animals, I 



1 ! 









