OF STEAM AT DIFEEEENT TEMPEEATUEES. 
21 
Summary of Column Determinations. 
Tempera- 
ture, 
Fahr. 
Number 
of deter- 
minations 
averaged. 
Mean 
level of 
column in 
globe- 
stem, 
in inches. 
Capacity 
of globe, 
in grains 
of water 
at39°'l. 
Mean 
difference 
of level of 
columns, 
in inches. 
Mean 
difference 
of level of 
columns, 
corrected 
to 32=, 
in inches. 
Pressure of 
steam in 
glohe, 
in inches 
of mercury. 
Pressure of 
saturated 
steam, in 
inches of 
mercury. 
Specific 
volume of 
steam in 
globe, 
corrected 
for ex- 
pansion 
of glass. 
155-0 
6 
25-93 
18447-2 
21-11 
20-86 
8-52 
8-51 
4911-9 
157-1 
3 
25-53 
18460-7 
20-71 
20-46 
8-93 
8-96 
4915-7 
159-2 
3 
25-18 
18472-4 
20-36 
20-12 
9-28 
9-42 
4918-7 
160-0 
4 
25-02 
18477-9 
20-20 
19-97 
9-32 
9-61 
4920-2 
170-2 
3 
24-82 
18484-5 
20-00 
19-76 
9-61 
12-21 
4922-6 
180-2 
3 
24-67 
18489-6 
19-85 
19-60 
9-77 
15-31 
4924-9 
190-2 
3 
24-49 
18495-8 
19-67 
19-42 
9-94 
19-06 
4927-0 
198-2 
4 
24-38 
18499-3 
19-56 
19-31 
10-04 
22-59 
4928-4 
206-2 
5 
24-28 
18502-7 
19-45 
19-20 
10-14 
26-67 
4930-0 
209-9 
2 
24-22 
18504-7 
19-39 
19-14 
10-21 
28-69 
4930-7 
The barometer read from 29-34 to 29-40 during this experiment. 
Experiment 4. — Globe G. Thermometers B and C. November 12, 1859. 
Weight of -u'ater introduced = 4-985 grains. 
Time. 
Thermometers 
in water-batli. 
Thermometer 
in mercnrj. 
Cathetometer. 
Difference 
of level of 
columns. 
B. 
C. 
Globe-stem. 
Mercury-bath. 
h m 
Fain-. ^ 
Fahr. ^ 
Fahr. ^ 
inches. 
inches. 
inches. 
1 0 
211 
211 
280 
21-54 
4-45 
17-09 
1 
211 
211 
285 
21-54 
4-45 
17-09 
1 25 
190 
190 
285 
21-96 
4-45 
17-51 
1 30 
190 
190 
285 
21-96 
4-45 
17-51 
At this point progress was stayed by the cracking of the outer tube. 
Summary of Column Determinations. 
Tempe- 
rature, 
Fahr. 
Number 
of deter- 
minations 
averaged. 
Mean 
level of 
column in 
globe- 
stem, 
in inches. 
Capacity 
of globe, 
in grains 
of water 
at 39°-l. 
Mean 
difference 
of level 
of columns, 
in inches. 
Mean 
difference 
of level 
of columns, 
corrected 
to 32“, 
in inches. 
Pressure of 
steam in 
globe, 
in inches 
of mercury. 
Pressure of 
saturated 
steam, in 
inches of 
mercury. 
Specific 
volume of 
steam in 
globe, 
corrected 
for ex- 
pansion 
of glass. 
1 
170 
18529 
17-90 
17-98 
12-16 
12-16 
3722-6 
I 190 
2 
21-96 
18516 
17-51 
17-26 
12-88 
18-99 
3720-9 
211 
2 
21-54 
18508 
17-09 
16-84 
13-30 
29-41 
3720-3 
The barometer (corrected to 32° Faiir.) read during this experiment 30-14 inches. 
