COMPARISON OF THERMOMETERS. 
781 
Means of Comparisons of H, B, P, March 3, 1845. 
No. of comparisons. 
H. 
B. 
P. 
8 
6*09 
5*66 
6*02 
10 
11*45 
11*37 
11*84 
9 
17*06 
17*19 
17*94 
10 
19*67 
19*82 
20*73 
10 
23*40 
23*71 
24*82 
Hence, observing that the zero of B was 0*22 lower in March 1845 than in 1855, — 
t. 
^-P. 
5*70 
-0*39 
-0*32 
11*34 
— 0*11 
—0*50 
17*15 
+ 0*09 
-0*79 
19*76 
+ 0*09 
-0*97 
23*63 
+ 0*23 
-1*19 
Means of Comparisons of H, P with G and L in July and August 1844. 
No. of comparisons. 
H. 
P. 
G. 
L. 
25 
16*43 
17*13 
114*96 
27 
17*46 
18*24 
65*90 
14 
18*37 
19*32 
124*75 
13 
20*73 
21*82 
93*03 
The corresponding readings of G, K, L, K, t in 1855 were, — 
G. K. t. L. K. t. 
114*96 16*504 16*49 65*90 17*503 17*49 
124*75 18*535 18*52 93*03 20*909 20*90 
At a given temperature the readings of G and L were higher in 1855 than in July 
1844 by 0°*02 C. and 0°*04 C. respectively. Hence the corresponding readings of 
G, L, t, in July 1844, would have been, — 
G. t. 
114*96 16*51 
124*75 18*54 
L. t. 
65*90 17*53 
93*03 20*94 
The corresponding readings of H, P, t, in July 1844, would have been, — 
H. 
P. 
t. 
#-H. 
t-V. 
16*43 
17*13 
16*51 
+ 0*08 
-0*62 
17*46 
18*24 
17*53 
+ 0*07 
-0*71 
18*37 
19*32 
18*54 
+ 0*17 
-0*78 
20*73 
21*82 
20*94 
+ 0*21 
-0*88 
graphic interpolation 
the following 
ralues of H, t— 
P were obtained 
t. 
t. 
if-H. 
t. 
if-P. 
t. 
if-P. 
0 
-0*50 
13 
— 0*07 
0 
-0*25 
13 
-0*53 
1 
-0*48 
14 
— 0*02 
1 
— 0*25 
14 
-0*57 
2 
-0*46 
15 
+ 0*01 
2 
— 0*26 
15 
-0*62 
3 
— 0*43 
16 
+ 0*04 
3 
-0*27 
16 
— 0*67 
4 
— 0*41 
17 
+ 0*07 
4 
— 0*28 
17 
— 0*72 
5 
-0*38 
18 
+ 0*10 
5 
-0*29 
18 
-0*78 
6 
-0*35 
19 
+ 0*14 
6 
-0*31 
19 
-0*84 
7 
-0*31 
20 
+ 0*17 
7 
— 0*33 
20 
-0*90 
8 
-0*27 
21 
+ 0*19 
8 
-0*36 
21 
-0*97 
9 
-0*24 
22 
+ 0*21 
9 
-0*39 
22 
— 1*04 
10 
— 0*20 
23 
+ 0*22 
10 
-0*42 
23 
— 1*12 
11 
-0*16 
24 
+ 0*23 
11 
-0*45 
24 
-1*20 
12 
-0*11 
12 
-0*49 
5 K 2 
