3o8 appendix. 
' “ 57* When Spirit of Sal Ammoniac and 
Spirit of Nitre were three Drams of each 
mixed, they made fomc Ebullition, and the 
Heat rofe from forty feven to eighty three 
Degrees ; the Mixture continued limpid and 
colourlefi. 
58. When thefe two Liquors wereplac- 
ed in diftinct Vefl'els under an Air Pump 
Receiver, they both fumed while the Air 
‘‘ was exhaufting and after it was all exhauft- 
ed. As foon as the Spirit of Nitre was 
poured on the Spirit of Sal AmmoniaCy 
“ there rofe an inftantaneous Motion, which 
like exploding Gun-powder, difperfed pare 
of the Liquor j but when thefe Spirits were 
afterwards mixed more gradually, then the 
following Explofions were left violent, the 
Heat increafed from forty feven to lixty 
three Degrees. The Mercury in the Gage 
defeended four Inches. 
55?. Tho* when equal Quantities of frefli 
Urine and Spirit of Nitre were mixed, 
there was no fenfible Effervefcence, yet the 
^ Heat increafed from forcy feven to fifty two 
Degrees. 
‘‘ 60. The fame Mixture in vacuo had no 
vifible Commotion, yet the Heat was raifed 
from 
