the Point of Mercurial Congelation. * 3 1 9 
Experiment I. made December 15, i"8i. 
Time per 
Watch. 
Therinom. 
below 0. 
• 
C 5 to 
CL, 3 
CL, «-> 
< 
Spirit 
Thermom. 
Remarks and Occurrences. 
h. , 
/ // 
* 
10 44 15 
244 
40 
— 
Removed the inftruments back to the 3d mixture 
10 44 35 
246 
40 
— • 
1 0 45 0 
248 
4 0 
— 
10 46 0 
247 
4 0 
— 
lO 47 O 
247 
40 
— 
ro 48 0 
2 46 f 
40 
• — 
10 49 0 
246 
4 ° 
— 
10 50 0 
246 
40 
— 
0 
O 
*—< 
2 45 l 
40 
— 
•i ° 5 2 0 
2 45 1 
40 
— 
53 0 
244 
40 
— 
55 0 
2 44 
40 
— 
10 55 20 
2 44 
40 
— 
Went away, to warm mvfclf. 
11 40 
n 4 
3 8 
— 
Returned. 
11 90 
54 
37 
— 
11 9 50 
48 
37 
— 
1 1 1 1 0 
40 
3 6 
— 
I I I 2 O 
39 
35 f 
— 
Put in the fpirit thermometer (D). 
II 13 O 
— 
— 
24 
II 13 40 
38 
0 r 1 
("Took out the apparatus ; the quickfilrer was 
I I 14 O 
3 8 
26-1 
{ perfectly fluid, and the inclofed thermometer 
L (F) was eafily withdrawn. 
Remarks and obfervations on the JirJl experiment. 
Finding the thermometer on Thurfday evening, the 14th of 
December, was 1 8° below the cypher, I concluded the morning 
would afford me an opportunity to make an attempt to fix the 
point at which quicklilver begins to freeze ; I therefore put a 
bottle of fpirit. nitri fortis upon the top of the houfe in open air, 
that it might be of the fame temperature when it was to be 
Vo l . LXXI1L *U u ufed. 
