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The moft ufual Sort of Thermometers is that dc- 
fcribed in the Account of the Experiments by the Aca- 
demy of Cemento ; which being the common ones, 
made ofSpirit of Wine ting’d, it is needlefs todefcribe. 
The Bounds of the Degrees of Heat which thefe 
will meafure, and which is commonly called the 
Range of the Inftrument, are from the Degree 
which freezes Spirit of Wine, up to that which 
makes it boil. The Spirit-Thermometers, commonly 
made here in London , are fo graduated, that when 
the Spirit is rarefied to the Degree that the moft 
fultry Sunfhine commonly known in our Climate 
of N. Lat. can raife it, there is placed the 
Mark o. or Degree of no Cold. Some few are 
mark’d io or 20 above this, if they are defign’d to 
be ufed in hotter Climates 5 Hut all are graduated 
downwards from this : So that the 45 °. is the Point 
of temperate, and 65°. is the Point of freezing, 
and ioo°. is plac’d juft above the Ball. But the 
moft accurate Spirit-Thermometers are thofe lately 
made by the ingenious Mr. Reaumur , Member of 
the Royal Academy of Sciences at Raris 5 he hath 
taken a great deal of Pains, and ufed great Exa&nefs^ 
in fixing the certain Points of freezing of Water, 
of temperate Air, and boiling Water. He deter- 
mines the freezing Point, by leaving his Thermo 
meter a confiderable time in Water, into which is 
put a good deal of Ice, at a time when the Water 
would not freeze of itfelfj and this he marks o. or 
the Degree of no Heat; and his Scale is mark’d 
with Numbers running downwards from o. mca- 
furing the Degrees of Cold, and upwards meafuring 
the Degrees of Heat : At 10-f upwards he marks 
T 1 1 1 the 
