445 
on Spirituous Liquors. 
but the contraction in cooling down from ioo° to 63° was 183 
— 2,5=182,5. In heating up again to ioo° it was 185 
— 3= 182, but in cooling down again to 6o°, 185 — 2,5 
= 182,5 ; the mean of the four is 182,62, and the total 
expansion from 30° to ioo°= 308,87; differing from the 
experiments by weight 1,7 division, in defect. The dif- 
ference between the two methods of heating up from 6o° to 
ioo°, and cooling down again from ioo° to 6o°, taking a mean 
of the two heatings, and the mean of the two coolings, is 0,75 
of a division. 
The contraction by the small instrument, in cooling down 
from 6o° to 30°, was 124,5 1 = 125,5. On heating up again 
to 6o°, the expansion was the same. In heating up from 6o° 
to ioo° the expansion was 183,5 — 1 = 182,5 5 but in cooling 
down to 6o° again, the contraction was 183,5 -f- 1,5= 185. 
In heating again up to ioo°, the expansion was 180,5 + 2 
= 182,5 ; but in cooling again to 6 o° the contraction was 
180,5 -f 4 = 184,5. The mean of these four gives 183,62, 
for the expansion from 6o° to ioo° ; and therefore the total 
expansion from 30° to 100° will be 309,12, differing from the 
expansion found by the experiments by weight 1,45 division, 
in defect. The difference between the mean of the two heat- 
ings up from 6o° to ioo°, and the two coolings down from 
ioo° to 6o° again, is 2,75 divisions. 
The mixture made use of in the above experiment was now 
emptied out, and the instruments were charged with more of 
the same, preparatory to the following experiments. 
The mixture being brought to the temperature of 6o°, was 
found to stand in each of the instruments at 1,5 above o. It 
was then cooled down to 30°, and it stood in the long instru- 
MDCCXCII. 3 M 
