230 Continuation of the Experiments and Obfervations 
have found to be feven grains ; therefore, a weight of fixed air 
equal to that of 97 cubic inches of dephlogifiicated air and 7 of 
phlogiflon, will contain 7 gr. of phlogiflon. Now, 97 cubic 
inches of dephlogifiicated air weigh 40,74 gr. ; to which, 
adding 7 gr. we have the whole weight of the fixed air equal 
47*74 g r - = 83,755 cubic inches ; and confequently 100 cubic 
inches of fixed air contain 8,357 gr. of phlogiflon , and the 
remamder elementary air.. 
100 gr. of fixed air contain 14,661 of phlogiflon and 85,339 
of elementary air ; which, when flripped of phlogiflon, and 
impregnated with its proper proportion of elementary fire, be- 
comes again dephlogifiicated air. Hence alio, 100 cubic 
inches of dephlogifiicated air are converted into fixed air by 
7I2165 gr. of phlogiflon, and will be then reduced to the 
bulk of 86,34 cubic inches. 
And reciprocally, 100 cubic inches of fixed air, being de- 
'Compofed, will afford 1 1 5,821 cubic inches of dephlogifiicated 
air, and part with 7,2165 gr. of phlogiflon, fuppofing the 
decompofition to be complete ; that is* the dephlogifiicated air 
abfoutely pure. 
Having read the foregoing account of the nature of fixed 
air to Dr. priestley, I had the fatisfa£lion to find it met with 
his entire approbation, which he authorized me to mention, 
notwithflanding what he had advanced to the contrary in his 
lafl publication. 
OF 
