.216 
MR. H. L. CALLENDAR ON THE PRACTICAL 
Table A.-y.—C omparison of Platinum and Ah' Thermometers—( continued ). 
Date and 
time. 
1 
Auxiliary 
thermo¬ 
meters. 
Observed 
resistances. 
h,so 4 
U - Gauge. 
Mercury 
manometer. 
Baro- 
meter. 
j Niim- 
| her. 
Re¬ 
marks. 
Results. 
Connection 
Spiral. 
X 
x r 
Ml 
M b 
^ March 11. 
11.60 . . 
11.54 . . 
1 11.58 . . 
12.0 . . 
! 12.5 . . 
O 
A. 17-4 
R. 142 
A.17'6 
R. 14 6 
R 24 2 173 
R 34 '587 
48-57 
48-60 
48-66 
48-67 
48-75 
942 
9-60 
9-90 
9-97 
10-5 
16-5° 
16-6° 
| 
G. 16-0° 
W. 568 235 
O^’ 
© oj 
© 
CO © 
(30) 
© 
X 
t = 440-9° 
pt = 417-1° 
d = 23-8° 
12.40 . . 
12.41 . . 
12.46 . . 
12.52 . . 
A. 17-8 
R. 14 9 
R. 151 
R 24 2-622 
R 34 '746 
57-77 
57- 80 - 
57 99 
58- 10 
2-87 
2- 97 
3- 37 
3-75 
17-1° 
CO o 
© r- 
© ib 
CO © 
(31) 
XO 
Ol 
X 
t = 599-8° 
pt = 552 6° 
d = 47-2° 
5.30 . . 
A. 17-0 
R. 16-4 
R 24 1-128 
2145 
21-44 
3-75 
5-91 
8-8 
45 71 
46-28 
50 07 
50 23 
CO ^ 
CO o 
05 © 
03 CO 
<N CO 
(32) 
•3 | g 
3 1 5 
pt = 17-91° 
t = 17-66° 
mk = 17-731 
March 12 
12.15 . . 
R. 142 
A. 16-2 
R 24 1117 
2120 
273 
8 7 
46-84 
50 23 
05 ^ 
to o 
p OC 
05 do 
CN © 
(33) 
*3 « g 
5 g-2 
< « 
pt = 14-18° 
t = 13 99° 
mk = 17‘723 
1.13 . . 
1.19 . . 
1.20 . . 
1.23 . . 
1.24 . . 
A. 170 
R. 14 6 
M. 18-5 
R 24 1730 
R 34 -530 
36-55 
36-43 
3630 
3617 
3610 
7-85 
623 
4 43 
2-70 
530 
8-7 
6-37 
638 
6-38 
637 
6-29 
70-42 
70-30 
70-30 
7022 
6916 
o 
<N g 
(34) 
no 
CO 
X 
ci 
0 
t = 241-76° 
pt = 236 00° 
d = 5’76° 
1.35 . . 
1.40 . . 
A. 170 
R. 14 7 
R 24 1-7 0 8 
3578 
3578 
8 15 
8-15 
15-55° 
15’65° 
W. 430-000 
iZ & 
aS £ 
« 1 
(35) 
GO « 
o| 
t = 232-90° 
pt = 228-08° 
d = 4-82° 
2.55 . . 
3.2 . . 
A. 16-2 
R. 15-5 
R, 4 1700 
R 34 536 
35-29 
35 32 
407 
4 20 
1575° 
W. same 
© ^ 
r —< O 
O CO 
© rH 
CO CO 
| 
(36) 
s I 
° g 
t = 225-71° 
pi = 22114° 
(Z = 4-57° 
3.20 . . 
3.22 . . 
3.28 . . 
A. 162 
R. 15-6 
M. 16 7 
R 24 1702 
35 39 
35-40 
35 40 
6 54 
415 
607 
8 9 
695 
7-10 
703 
66-60 
67-31 
6678 
lO & 
<M o 
© 
© Ah 
CO CO 
(37) 
OC JJ 
® s 
t = 227-59° 
/ < = 222-50° 
d = 5 09° 
March 17 (?) 
6.35 . . 
6.41 . . 
6.47 . . 
A. 15 7 
R. 159 
M. 15 6 
R 12 1131 
21-50 
2149 
21-47 
21-45 
6-30 
6 02 
4-11 
3 61 
1 
9 3 
43-68 
43-68 
4334 
4335 
47-28 
47-28 
47-18 
47-18 
O O 
rpi 1- 
© 05 
CO IQ 
(38) 
Cp 
*3 
a 
= 1S-32 0 
t = 18-0S° 
mk = 17"713 
Explanation of the Tables. 
The dates and times are given to show the sequence of the observations, the rate of 
variation of the temperature, to indicate how far the results may be relied on, and to 
trace the historical element. 
The auxiliary thermometer readings are corrected for zero error. A. gives the 
temperature of the air near the gauge ; R., of the air inside the resistance-box; M., of 
the mercury of the manometer. The box used in this series of experiments was a 
