Mr. Cavenpisny’s Experiments on Air. wk 
the litmivis-to fixed air; but he thinks. it; ipsoceeds. fram.a de-- 
compofition:« of fore part! of. the | vegetable: “pace, as, all veges. 
table juices- contain’ fixed air., Me et that, fuch. a, decompofition: 
does not take place, 1 think may be: inferred, from, the.,following» 
reaforis’:/firft, if the electric fpark. bej taken through, phlogifti- 
cated or inflammable air confined! by. litnaus, ‘no rednefs is. \prors 
duced, {the air not being, i; the leaf, diminithed. ; | arid, adlyy 
ifthe litmus were decomtpofed, ‘inflammable. air -fhould, be. ‘ptos: 
duced as' well as ‘fixed air}. and then there, fhould be. ani addition: 
of bulk: inftead.of a diminution ;,/but :what fets che, ofigia of, 
the fixed air:from the phlogiftication of he common air beyond, 
alk doubt 1s;): that-if hime-water be: udéd, andtéad!. pT: dismuss the; 
dirninution, is the fame, ahd. the’ lite; fis - sprecipitateds: ee 
Mr.CavennisH fays, the -fixed air, proceeds jéithier ; from-fome; 
dintan the tube ja Lappofitien,. which, being:neither neceflaty, NOE: 
probable; is not admiffible;! or elle: fromfome,combuftible mation! 
wa the lime 3 but lime comtains: nO-¢ommbudtible matter, except; 
perhaps: phlogifton, which -canhot® produee:.. fixed: aut;-but, by: 
uniting to the common ait,according ito: my: {uppofition’; but: 
it ig much: more:probable, that the diminution dogs.not-arife from: 
any phlogifton in. thé lime, as it is: exadtly: the fame whether: 
lime-water be ufed or not; and the lime does not appear to be. 
in the leaft altered, and.in. cents {earce any phlogifton.. 
Sulachcha hth s ie Re abt AR ett é ' MOV UA BAVAT EL SOS We 
ay cs 
devon l 
Of ‘the, din minution n of Commop Ar, ir, yy the ong date i 
Ji is} 5 at 
sieht _ Mercury and Lead. 
+ Piateaibiieadt this diminution” to hen pllogiftications of | ithe 
common aii by the procefs of: ‘amalgarnation,: and thei cones: 
a, eta and abforption of a ike? On chi Mi Gav 
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