APPENDIX. 305 
ciful Faaies, the Heat increafing from forty 
eight to a hundred j all the Metal was like- 
wife prefendy diffolved into a Tindture like 
the former. So that the EfFcft of Spirit of 
Nitre is in vacuo the fame on Brafs and 
Copper, but very different in the open 
“ Air. The Mercury in the Gage fubfided 
5 Inches. 
43. A Dram of Filings of Silver and 
Spirit of Nitre did effervefee, but not much, 
fome Fume flew off; the Heat increafed 
from forty eight to fifty feven. 
“ 44. The like Mixture in vacuo made ari 
Ebullition, like boiling Water, but with 
little Froth ; but, what is wonderful, there 
was no Heat excited the Thermometer 
at forty eight Degrees. 
4j. Spirit of Nitre poured on a Dram of 
Bifmuth, made an inexpreffibly violent Ef- 
fcrvcfcence, and fuch plentiful Fumes as 
filled the whole Houfe like thofe from 
Tin : The Heat incrcafed from forty eight 
to two hundred and forty three. When 
the Ebullition ccafed the Mixture fell into 
a dry ycllowifli Calx. 
46'. The like Mixture in vacuo^ made 
.a vafl Effervefccnce with plentifui^Tumes^ 
