318 REPORT—1857. 
lines in Fig. 1 also show the position and dimensions of the air-chambers 
within-board and of the relieving tubes. 
A represents the deck. 8, the relieving tubes (6 in. diameter). _c, the 
side air-cases. D, the end air-chambers. 
In Fig. 3, the exterior form of transverse sections at different distances from 
stem to stern is shown. Fig. 4 represents a midship transverse section. 
A represents sections of the side air-cases already described. 
B, the relieving tubes, bored through solid massive chocks of wood, of the 
same depth as the space between the deck and the boat’s floor. 
c, spaces beneath the deck, filled up over 6 ft. in length at the midship 
part of the boat with solid chocks of light wood, or boxes of cork, forming 
a portion of the ballast, as before described. 
D, a section of a tier below the deck, having a moveable hatch or lid, in 
which the boat’s cable is stowed, and into which all leakage beneath the 
deck is drained through small holes, with valves fixed in them. In some 
of the latter boats, a small draining tier only is placed, having a pump in it, 
by which any leakage can be pumped out by one of the crew whilst afloat. 
The proportions of one of these boats are as follows :— 
Length, 30 ft. Beam, 7 ft.6 in. Depth amidships, 3 ft. 4 in., exclusive 
of keel. Depth from boat’s floor to deck, 1 ft.3 in. Depth from deck to 
thwarts, 1 ft.3 in. Depth from thwarts to gunwale, 10 in. Length of end- 
cases (D), 4 ft. Width of side-cases (c), extreme, 1 ft. 6 in. 
Fig. 3. 
Midship Section. 
The festooned lines in Fig. 1 represent exterior life-lines attached round 
the entire length of the boat, to which persons in the water might. cling 
until they could be got into the boat : the two central life-lines are festooned 
lower than the others to be used as stirrups, so that a person in the water 
could more readily, by stepping on them, get into the boat, which is a very 
difficult operation for even a strong man to effect, with heavy, wet clothes 
about him. F 
It may be observed, that several lighter boats have been lately constructed 
on Mr. Peake’s design, of the dimensions and proportions of the Coast-guard 
