70
THE NATURE AND
[sect. it.
Southern’s Experiments on the Force of Steam. 1
Temperature of
the steam.
Force in inches of mercury.
Temperature of
the steam.
Force in inches of mercury.
Observed force.
By Rule
page 59.
Observed force.
By Rule
page 59.
32°
0-16
0-172
132°
4-71
5-07
42
0-23
0-266
142
6-10
6-53
52
0-35
0-401
152
7-90
8-33
62
0-52
0-587
162
10-05
10-52
72
0-73
0-842
172
12-72
1317
82
1-02
1-182
182
16-01
16-35
92
1-42
1-629
212
30-00
30-00
102
1-96
2-21
250-3
60-00
60-00
112
2-66
2-95
293-4
120-00
120-50
122
3-58
3-89
343-6
240-00
247-80
100. A scale of the elastic force of steam at high temperatures was published
in 1822 by Mr. Philip Taylor, 2 which was formed by means of an apparatus
not described; but it appears to correspond with the best experiments, and is likely
to be near the effect in practice where we may expect some loss of elastic force,
compared with the temperature.
Taylor’s Scale of the Force of Steam.
Temperature of
the steam.
Force in inches of mercury.
Taylor’s obser
vations.
By our Rule
page 59.
212°
30-00
30-00
220
34-95
34-92
230
41-51
42-00
240
50-00
50-24
250
59-12
59-79
260
7010
70-8
270
82-50
83-45
280
97-75
97-92
290
114-50
114-4
300
133-75
133-2
320
179-40
178-5
101. The experiments of Schmidt present a surprising accordance with the
rule, at the temperatures from 60° to 230°; at these points they slowly sepa
rate, the rule being in defect in the highest temperature 290° by 11 inches,
and in excess at 43°J by 0T63. 3
1 Robison’s Mechanical Philos, voi. ii. p. 173. 2 Philosophical Mag - , voi. ix. p. 452.
3 Dr. Young’s Nat. Phil. voi. ii.