280 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
No. 3. The hydrant pump is piped to take water from the sea or the bilge, and 
delivers to the boilers, hydrant pi]>e, ash chute, or overboard. It is used for the 
general purposes of the ship and can be worked in connection with No. 2 in case of 
fire or leak. The bilges are pumped through a manifold system which is common to 
both of these pumps. 
No. 4. The auxiliary boiler feed is a vertical bulkhead pump, piped to take water 
from the sea, hot well, and drain tank, and delivers to boilers, ash-chute, and fire-room. 
No. o. The evaporator feed pump takes water from the sea or from the discharge 
pipe of the distiller and delivers it to the evajiorator. 
No. 0. The aquarium pump has a sea connection, and delivers water to the 
aijuaria and bath tubs. 
Table showing the size and power of steam p amps. 
Ship's 
IIUIH- 
l>er. 
Maker's 
number 
on size. 
H. r.= 
high iires- 
snre. L. 
S. =Iighti 
service. 
Diaiu. of 
stecTiu 
cylinder. 
Diam. ot 
water 
cylinder. 
Inches 
stroke. 
Gallons 
per 
stroke. 
Capacity per min- 
ute at ^>iven 
Sliced, ordinary 
service. 
Capacity per min- 
ute severe serv- 
ice, in case of 
emergency. 
Weiglit 
pounds. 
1 
2G 
L. S 
14 
16 
14 
12. 18 
Stroles. 
86 
Gallons. 
1,047 
Strokes. 
172 
Gallo'ns. 
2, 094 
2,000 
2 
5 
H. P .... 
9 
5i 
12 
1.12 
100 
112 
200 
224 
1,100 1 
3 
5 
L. S 
7 
5 
10 
.85 
120 
102 
240 
204 
900 
4 
2 
H. P . . . . 
4J 
2i 
6 
.13 
150 
194 
300 
39 
250 
5 
1 
H. P . . . . 
3i 
2 
4 
. 05 
150 
7j 
oUO 
15 
200 
0 
1 
H. P .... 
3i 
- 
4 
.05 
150 
74 
300 
15 
200 
Approximate data of hestfo 
Hours and minutes 8 
Meau speed 11.52 
Steam i)i'essure 71 
Receiver lu'essure 24 
Revolutions 87.0 
Vacuum 25 
Throttle, h(des 8 
Cut-off, in decimals of stroke .12 
Temperature : 
On deck degrees . . 50 
lu engine-room do.... 100 
Injection water do ... . 47 
r hours run { June 27, 1S93). 
Temp er at u r e — continued. 
Discharge water degrees. . 70 
Feed water do .... 106 
Barometer 30. 15 
Mean draft of water feet.. 12 
Displacement in tons tons.. 1.074 
Pounds of coal consumed ]ierliour (Rau- 
aimo) 1, 740 
S(£uare feet of grate surface in use 120 
Sipiare feet of heating surface in use 2, 934 
Ratio ol' heating surface to grate surface . 23.3 to 1 
