298 APPENDIX. 
. ^^10] On mixing the like Ingredients in 
Vacuo^ there was a very great Effervefcence 
with much vifeid Froth ; but what was ve- 
“ ry remarkable the Thermometer fell from 
forty four to forty three Degrees ; and the 
Mercury in the Air Pump Gage fubfided 
four Lines, the Stones w»ere much lefs dif- 
folved than in the foregoing ninth Experi- 
ment. 
II. There was a vifible Effervefcence tho’ 
\ 
little Froth,' v/hen half an Ounce of Vi- 
“ negar and a Dram of white Chalk were 
mixed, the Heat was increafed from forty 
four to forty five 4th. 
“ 12. When the fame Experiment was re- 
“ peated in Vacuo^ there was a great frothing 
‘‘ Eftervefcence, but the Thermometer de- 
feended from forty four to forty three : 
And there was fo much elaftic Fluid gene- 
rated, as made the Mercury in the Gage 
fall four Lines. 
13. And the Effe£ts were nearly the (ame, 
both in the Air and in Vacno^ where Vi- 
negar and a blue Namur Stone were mixed, 
“ 14. Three Drams of Spirit of Sea Sale 
being poured on a Dram of Filings of Iron^ 
‘‘ there arofe a fmall tho’ fenfiblc Effervefcence, 
whereby 
