Note 26 — Chapter VI · General Rules for the Construction of the Conception.
Reading edition
The formula is
v
= 2·037(
a
t
− 1) where
v
is the velocity of cooling,
t
the temperature of the thermometer expressed in degrees, and
a
is the quantity, 1·0077.
The degree of coincidence is as follows:—
Excess of temperature of the thermometer, or values of t. Observed values of v. Calculated values of v.
24010·6910·68
220 8·81 8·89
200 7·40 7·34
180 6·10 6·03
160 4·89 4·87
140 3·88 3·89
120 3·02 3·05
100 2·30 2·33
80 1·74 1·72