DEEP-SEA EXPLORATION. 
273 
Principal dimensions of llu- hoals and inacliincry. 
Cutter. 
Gig. 
Length from forward edge of stem to after edge <d' stern 
feet . . . 
20. 500 
25. (183 
Lengtli at the load water-line 
do.... 
24. 500 
24. 583 
(ireatest beam 
do.... 
6. 750 
5 
Beam at the load water-line 
do.... 
6. 400 
4.833 
Ifopt'li from top edge of gunwale to lower edge of rabbet ol' keel : 
Forward 
do.... 
4. 330 
3. 500 
Amidships 
do .. 
3.417 
2. 667 
Aft 
3. 077 
3. 607 
Draft of water, exclusive of keel: 
Forward 
do.... 
1. 007 
f. 417 
Amidships 
1. 625 
1.417 
Aft 
1. 583 
1.417 
Depth of keel: 
Forward 
do.... 
.25 
. 208 
Amiilships 
. 025 
. 458 
Aft 
1. 000 
.375 
Area of greatest immersed transverse sectnm 
.S(iuare feet. . 
7.27 
6. 216 
Area of load water-line 
do... 
101.65 
86. 67 
Aggregate areaof the wetted siu faees 
do.... 
116.25 
99. 76 
Displacement at the load water lino 
. . .cubic feet. . 
89.29 
40. 80 
Weight of hull aiid fittings 
3, 300 
1, 700 
Weistlit of boiler 
do.... 
910 
470 
Weight of coal and water 
do 
1, 394 
550 
Weight of engine, including screw 
do 
520 
182 
AYeight of the boat complete 
do 
6, 124 
2, 902 
1 
1 
Diameter of casing of boiler 
inches.. 
35 
27 
Extreme height, of hoiler from ash-pit to base of smoke-pipe 
do.... 
29i 
23A 
■Piaioeter of furnace 
do.... 
30i 
22i 
Area of grate surface 
6. 7 
3.4 
Diameter of smoke-pipe 
10 
8 
Heiglitof smoko-pipe above grate bars 
feet.. 
8.75 
t). 75 
Diameter of sei>arator 
inches. . 
6 
3 
Height of separator 
do.... 
31 
26 
Steam cylinders 
luimher. . 
o 
2 
Diameter of high-pressure cylinder 
2i 
Diameter of low-pressure cylinder 
do.... 
6 
4-1 
Stroke of ]>istoii8 
<lo.... 
7 
5 
Diameter ot the iiiston rods 
do 
i 
T5 
Diameter of the air luinip (single-acting) 
do.... 
-I 
Stroke of air piini]) 
do.... 
Diameter of circulating piimp iilunger 
<lo.... 
i 
Diameter of feed pump-plunger 
do.,.. 
§ 
Stroke of pumps 
do.... 
7 
5 
Length of condensing jiines 
15 
13t5 
Condensing surface 
9. 83 
4. 95 - 
Alain journals 
3 
3 
Diameter of main journals 
u 
li and 21 
Length of main journals 
3 
24 
Crank- 2 >in journals 
2 
2 
Diameter of crank-pin journals : 
Uigh-pressuro 
14 
14 
Low-i)ressure 
do.... 
5 
Length ot crank-pin journals : 
Kigh-i»ressure 
14 
1 
IiOw-i>ressure 
n 
li 
Space occui>ied by the engine: 
Lengtli fore and aft 
24J 
21 
Width 
21 
18 
Height 
44 
26 
Diameter of the screw propeller 
28 
16,1 
Pitch of the screw iu'opeller {uniform) 
do... 
48. 72 
30 
Proiected length of the screw on line of its axis 
5 
3 
Blades ot the screw 
4 
2 
0.49 
3. 69 
0.2 
h 
Helicoidal area of tlie screw blades 
Weight of the screw 
45 
6 
P. C. B. 189B— 18 
