314 APPENDIX. 
ing the Oil of Vitriol on the Sal Ammo- 
niac^ there was inftantly a great ElFer- 
vcfccnce, with fuch Plenty of afcending 
‘‘ Fumes, as filled the Receiver, fo that he 
could fcarce diftinguifli the Degrees on 
the Thermometers, but in half a Minute 
the Receiver was more pellucid 5 the Li- 
quor in the Thermometer which was pla- 
ced in the cfFcrvefcent Mixture, had de- 
‘‘ feended from fixty feven to forty fix De- 
grees in a Minute's time 5 after which ic 
began to afeend, and when it had come 
to fifty eight, then the Liquor in the o- 
ther Thermometer was at fixty nine : and 
‘‘ when the lower Thermometer was at fixty, 
then the upper one was at fixty nine one 
Qiiarter. But when after two Minutes the 
lower Thermometer was fixty eight, then 
“ the upper was feventy ; after another Mi- 
nute both Thermometers were at feventy: 
But after five Minutes the lower Thermo- 
meter was at feventy two, the upper one 
“ continuing at feventy. And the lowxr 
one afeended to feventy four, even after a 
Qiiarter of an Hour ; and when the Eft'er- 
vefcence ceafed, yet the upper one con- 
tinned at feventy, the Effervcfcence lafied 
4 ' at 
