192 ME. M. EANKINE ON THE THEEMO-DTNAMIC THEOEY OF STEA3I-ENOINES. 
Example III.— Paddle-steamer of 1100 tons displacement, with a pah of engines of 
1176 indicated horse-power. 
In this and the following example, some of the data were not obtained with sufficient 
precision to make it worth while to use the exact formulae; and therefore the approxi- 
mate formulae alone are employed. 
Data ; — 
Results : — 
lb. per inch. 
Mean . 
. . i?, -1-144 
38 
Mean . 
. . j93-^144 
Mean . 
1 
0-15 
■ ■ r 
lb. per inch. 
w-t-144. 
Calculated . 
. . 12-35 
Observed . 
. . 12-2 
Difference . . 
. .-h 0-15 
h~W 
88-3 
E 
0-14 
Example IV.— The same steamer as in Example III., with only one of her two boilers 
at work ; indicated horse-power, 568. 
Data : — 
Mean . 
. pi-^144 
lb. per inch. 
32 
Mean . 
. . ^3 -1-144 
3 
Mean . 
1 
* ■ T 
0-1 
Results : — 
w-t-144, 
Calculated . 
lb. per inch. 
. . 7-05 
A-i-144 
Observed . . . 
Difference 
. . 7-0 
. .+ 0-05 
49-6 
