tried a feries of experiments to this purpofe; but it 
was in weather far lefs cold than the preceding ex- 
periments were tried in, viz. between i yp and 153, 
by his thermometer. By thefe it appears, that fpirit 
of fait pounded upon fnow, increafed the natural 
cold 30 degrees; fpirit of fal ammoniac, 10 ; oil of 
vitiiol, 35 > Glauber s fpirit of nitre, 58; aquafortis, 
40 ; fimple fpirit of nitre, 30 ; fpirit of vinegar, and 
lemon juice, made no remarkable difference ; dulci- 
fied fpirit of vitriol, 20 ; Hoffman’s liquor anodynus 
32; fpirit of hartfhorn, 10 • fpirit of fulphur, 10 \ 
fpirit of wine rectified, 20 ; camphorated fpirit, 1 5; 
French brandy, 1 2 ; and even feveral kinds of wine, 
increafed the natural cold to 6, 7, or 8 degrees. 
That inflammable fpirits lliould produce cold, feems 
veiy exti aordinary, as rectified fpirit feems to be li- 
quid fire itfelfj and what ft ill appears more pardoxi- 
cal is, that inflammable fpirits poured into water, 
caufe heat; upon fnow, cold : and what is water, 
but melted fnow ? 
Though not immediately relating to the principal 
purpofe of this treatife, our author meafured by his 
theimometer, when it flood in his fludy at 128 de- 
grees, the heat occafioned by pouring different fluids 
into water. He found, that oil of vitriol produced 
3-5 degrees ; fpirit of fea fait, jo ; Hoffman’s anodyne 
liquor ledfified, 5 ; fpirit of wine, 10. On the con- 
trary, fpirit of fal ammoniac mixed with fnow, fpirit of 
lulphui, and fpirit of hartfhorn, mixed likewife with 
fnow, made no perceptible difference. Highly recti- 
fied chymical. oils, mixed with water, produced no 
heat; nor with fnow, no cold; as was tried in the 
oils of turpentine, amber, mint, and mother of thyme. 
Vol.LIL z And 
