fo xt ] 
of falubrity, or fitnefs for refpira- 
tion, when I was with him at Paris 
in the beginning of the fummer of 
1777, and as 1 have, fince he re 
joined me in London, 1778, feen a 
very great number of the like eX- 
periments, I provided myfelf with 
the fame inftruments, on purpofe to 
-_ imitate his method of examining 
air, which I found fo accurate, that, 
in ten experiments made one after 
the other with the fame kind. of 
aR: the refult differed feldom akowe 
555 3 that i is to fry, ‘that the ren 
ing bulk of the three meafures of : 
nitrous air, which he joins one after 
another to the two meafures of atmo- 
tebsric air, is fo alike in the various 
ments made with the fame 
common air, that the difference will 
f{eldom amount to more than ~ats B 
Ra 
abe whole ; ; which 
oes L& 
