295 
His Majesty* s Ships of }Far, 
figure 1, which is termed the Jesuit's perspective, or bird's 
eye view) of the internal part of one side of a 74 gun ship in 
a complete state, with fillings in the openings between the 
timbers of the frames instead of the planking over them. 
In this state the diagonal timbers are introduced, intersect- 
ing the timbers of the frame at about the angle of 45 degrees, 
and so disposed as that the direction in the fore, is contrary 
to that of the after part of the ship (as may be seen in the 
engraving), and their distance asunder from six to seven feet 
or more ; their upper ends abutting against the horizontal 
hoop or shelf piece of the gun deck beams, and the lower ends 
against the limber strakes, except in the midships, where they 
come against two pieces of timber placed on each side of the 
keelson for the purpose of taking off the partial pressure of 
the main mast, which always causes a sagging down of the 
keel, and sometimes to an alarming degree. These pieces of 
timber are nearly as square as the keelson, and fixed at such 
a distance from it, as that the main step may rest upon them. 
They may be of oak, or pitch pine, and as long as can be con- 
veniently procured. 
Pieces of timber are next placed in a fore and aft direction 
over the joints of the frame timbers at the floor and first fut- 
tock heads, their ends in close contact with, and coaked or 
dowelled to the sides of the diagonal timbers. In this state 
the frame work in the hold presents various compartments, 
each representing the figure of a rhomboid. 
A truss timber is then introduced into each rhomboid with 
an inclination opposite to that of the diagonal timbers, thereby 
dividing it into two parts. The truss pieces so introduced into 
the rhomboid, are to the diagonal frame what the key stone 
Qq 2 
