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.