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Oil of turpentine applied to the fame ufe ac- 
quires a heat of 12 degrees above that of boding 
water or 224. degrees ; it becomes of a dai k brown 
colour, though tranfparent, and has a difagreeable 
bituminous fmell. The thermometer not mea ur- 
ing more than 213 degrees, could not be left 
with fafety any longer. . , r n c 
Another time oil of turpentine was made 
to condenfe the vapours, which proceeded from 
1 m of fal ammoniac, with i lb * of oil of v iti 1 , 
and 5 of a pound of water : here it did not giow 
near fo hot, nor fo high coloured, as in the other 
experiment, but was for the moft part congealed. 
P The difference of thefe two experiments may 
perhaps, be owing to the fmallnefs of .the quan y 
of the ingredients in thelaft procefs; form the fi ll 
there was 1 4 lb of fait, 14ft of oil of vitriol, and 
7 lb of water. 
Of the re-abforbtion of Air in DifliUations. 
In all diftillations a quantity of elaftic air is let 
free in the beginning, but afterwards there is a re- 
abforbtion of the fame ; the followmg experiment 
was made to fbew how great it is in fome cales. 
For the apparatus. Ice fig. 1. 
One pound and a half of foreign fal ammoniac 
was put into a retort, and itbt ° °'l of v.tuol 
(prevfoufly diluted the day before with ? oi a pound 
of water) 'poured on it, and a recipient well luted 
to it- the recipient had a tube 31 inches, well 
led and luted to it, and this tube was immeried m 
a glal's veflel containing a quart of water. 
The 
