3i6 appendix. 
' 7 8. The ingenious Author obferves hence 
the great Variety of very diflFerent EfFefts, 
which thofe fcveral effervefeent Mixtures 
produce, viz. 
75). As firfl:, that the EfFervefcences of 
the fame Bodies produce the fame Heat 
‘‘ in the open Air and in vacuo, as appears 
by Number 48 and 4^, when Crude An- 
timony and Spirit of Nitre were mixed 
together. 
“ 80. Sometimes Effervefcences are greater 
and hotter in the Air than in vacuo* 
Thus Number \ 6 . Bifmuth and Spirit of 
Salt made a greater Effervefcence in the 
open Air, and acquired a Heat from forty 
feven to a hundred and fifteen Degrees, 
whereas in vacuo the Heat was raifed 
only from forty feven to ninety four De- 
‘^' grees. It was the fame alfo in Number 
33 and 34, in 33 and 3<S, in 37 and 38, in 
forty five and forty fix. 
81. On the contrary the Effervefcences 
are fometimes hotter in vacuo than in the 
open Air, as is evident by comparing Num- 
ber 14 and 15, where Spirit of Sea Salt 
and Filings of Iron made a more vehement 
Effervefcence in vacuo than in the Air > for 
in 
iC 
