236 Continuation of the Experiments and Obfervations , &c. 
acid 4,32 gr. of phlogifton, 8,5 gr. of copper would yield 
0,307 of a grain of phlogifton; this then is the whole quan- 
tity extracted by the marine acid, and contained in 91,28 cubic 
inches of air, and deducting from this the quantity of phlo- 
gifton contained in 4,9 cubic inches of inflammable air 
( — 0,171 of a grain), the remainder, viz, 0,367-0,171 = 
0,196 is all the phlogifton that can be found in 86,38 cubic 
inches of marine air. Then ico cubic inches of marine air can 
contain but 0,227 nearly of a grain of phlogifton 65,173 of acid. 
Hence we fee why it a<£ts fo feebly on oils, fpirit of wine, &c. 
having a very fmall affinity to phlogifton ; and why it is not 
diflodged from any bafis by uniting with phlogifton, as the vitri- 
olic and nitrous acids are, its affinity to it being inconfiderable. 
