the cartridges out of the magazine-room with the door itself closed;
and it is to have a lid so arranged as to open outwards only, and to
close of itself when the scuttle is not actually in use.

193. Sailing ships-of-the-line and frigates should have two alleys for
each magazine. In screw-vessels of large class, where the shaft will
interfere with this arrangement, two alleys for the forward magazine.
In smaller vessels one alley will suffice. In all cases the alley is
to be not less than two feet and ten inches in breadth, and it ought
to be more, if practicable, to prevent confusion and delay. Each alley
is to be illuminated by a separate light.

If there is room in the magazine, there should be space left, at the
end nearest the light, for a man to pass from one alley to the other
without going into the passage.

194. Ships with two magazines--one forward and the other aft--are to
have them as nearly equal, in point of capacity, as the shape of the
vessel and other circumstances will admit.

Magazines should be constructed as low down as possible. Their floors
may rest on the keelson, but should not come below it. Their height
should be equal, only, to an exact number of times the height of a
powder-tank when lying on its side, in addition to the thickness of
the shelving. An additional inch for each shelf should be allowed for
play or spring. The whole height in the clear should be limited by the
condition that a man standing on the floor may reach the upper tier of
tanks with ease. Four tiers of 200-lb. tanks, three of them resting on
shelves two inches thick, and the other on inch battens on the
magazine-floor, will, with an allowance of one and a half inch for
play and spring, require a height, in the clear, of six feet two
inches. Both safety and convenience would suggest this as the maximum
limit in height, even for the largest magazine. Three tiers of these
tanks will require a height, in the clear, of about four feet eight
inches.

If, however, in ships of great draught of water, it should be found
practicable to extend the height of a magazine so as to accommodate
five tiers of tanks, then the lower or ground tier may be laid so as
to occupy the whole of the magazine-floor; and on the top of this
tier, in the alley-way, a light false bottom is to be placed for the
men to stand upon to enable them to reach the upper tier, which is the
one that should first be exhausted. This false bottom should be made