F. M. Groening m the Use of the Thermometer^ 215 
the strength of 8° by the alkohometer ; the following were the 
stations of the mereiiry in the thermometer during the opera- 
tion : 
Reaumur’s 
Quantity 
Reaumur’s 
Quantity 
Thermo- 
Alkoho- 
distilled 
Thermo- 
Alkoho- distilled 
meter. 
meter. 
in Pots. 
meter. 
meter. in Pots. 
65® 
15® 
5| 
13® 1 
66 
14| 
n 
74 
[ I 
6T 
Ui 
If 
75 
11 ) 
68 
14i 
H 
76 
10 ) 
69 
14 
I 
77 
8 \ i 
70 
13f 
9 
78 
71 
134 
3 
S 
79 
'* 
72 
m 
k 
80 
As this experiment was made with a fluid of 8° strength, so, 
for the sake of greater certainty, several experiments were per- 
formed, both with stronger and weaker fluids, and the results 
corresponded exactly with the above : for instance, with a fluid 
of 14° strength, the thermometer, at the commencement of the 
distillation, stood at 63°, and the strength of the spirit was 16° ; 
the instrument continued stationary, until the spirit, which came 
over, was weaker, when it rose gradually in the foregoing pro- 
portion. 
On the other hand, when the strength of the liquor is only 
4° ; at the beginning of the operation the thermometer stands 
69® 
at and the product is 14°, but afterwards follows by degrees 
the preceding proportions> 
These experiments, performed many tunes, and always with 
the same result, gave rise to the following results : 
1. A person may, by the state of the thermometer, imme- 
diately ascertain the strength of the liquor in the vessel. 
2. There is no necessity of using the alkohometer in distilla- 
tion, as the preceding account shews that the thermometer indi- 
cates the strength of the liquor with equal accuracy. 
3. Without drawing off any spirit, what quantity there is of 
any particular strength may be immediately known. 
4 . Every possible fraud, during the operation, may be pre- 
vented, as the apparatus can either be locked up, or brought 
p 2 
