Br. Cavenpisn’s Experiminty th Airs ohgg 
the earth by fixed alkali, the precipitate of the fecond experi 
tent weighing one-fifth of a grain, and that of. the firft 
being feveral:times lefs. The ftandard of the burnt air in the 
firft experiment was 1,86, and:in the fecond only. 0,9: 
oIt muft be’ obferved, that all circumftdnces, «were the 
fame in thefe two experiments, except that in thé latter'the 
air to be exploded was mixed with fome phlogifticated air, aid 
that in confequence the burnt air was more phlogifticated than 
in the former ; and from what has been before faid, it appears, 
that this latter circumftance ought rather to have made.the 
condenfed liquor lefs acid; and yet it was found to be:much 
more fo, which fhews ftrongly that it was the ahivaiinies 
air which furnifhed the acids ls 
As a further confirmation of this point, id two cBliagiathe 
tive:experimients' were repeated>with a little variation, namely, 
in the firft experiment there was firft let into the globe 1500 
of dephlogifticated air, -anditheti the mixture, confifting’ of 
12200 of dephlogifticated airand 25900 of inflammable, was let 
in at differentitimes as ufual. In the fecond experiment, befides 
the 1§00 of dephlogifticated air: fitft Jet in, there was alfo ads 
mitted 2500\0f phlogifticated: air; after which» the mixtures 
_¢onfifting of the fame quantities.of dephlogifticated and in fame 
mable air-as before, was let inasiufual.! “Fhe ¢ondenfed liquor 
of the fecond experiment was about three. titedi as acidias thab 
of the firft, as ie required 119°grainsyof ‘a diluted folution of falt 
of tartar to faturate it, and theather only 39: ihe: ftandlardof 
theburntiair was! 6; ay in theofecond: coe and: pi 
the firtt. - OS -Sibg! “at embrerit. § 
‘The intention of sft letting i in Korii dejpitopiitichted 
ait ea the ‘two fat ie nepagaie ‘was, thatthe comdenfed! oo 
er 10. 10%. 2 OVP oa goloce avad 1 woll was 
