[ 527 ] 
^ 5.°^ sre diftilled in the common 
manner with an equal quantity of oil of vitriol un- 
mixed with water, there only diftil 2 ^ of fpirit of 
fait; whereas, if diddled in this new manner, we 
not only obtain the like quantity, but likewife 4 3 
an half more, which are condenfed in the water; 
fo that in making this concentrated fpirit of fea 
fait, there is a having of above double the quantity, 
which would be loft in the common method of 
operating. 
Of the heat produced by the vapours of fpirit of 
fait palling through water, fpirits of wine, and 
oil of turpentine : 
Three quarts of water were put into a gallon 
ftone bottle, and made ufe of to condenfe the va- 
pouis, as in experiment the 2d, fig. F; in three 
hours and a half after the fire was made under the 
retort, the water in the ftone bottle had acquired 
the degree of 212, which is the mark of boiling 
water in Fahrenheit’s thermometer; and at this time 
there was fcarcely 2 3 of fpirit of fait diddled into 
the bottle, fig. C. The receiver and bottle C 
feemed cold to the touch ; the water at F had in- 
creafed 2 lb 3 Another like bottle with the fame 
quantity of water being put in the room of this, 
in fome time, acquired the fame degree of heat. 
The fumes feem to condenfe very well until the 
water acquired a heat within twelve degrees of 
boiling water. 
Spirit of wine rectified, made ufe of indead of 
water to condenfe the vapours, acquires a heat equal 
to 188 degrees; and it grows of a deep brown co- 
lour, though tranfparent. 
Oil 
