[2502]. Steel bottle for compressed gases, &c.
Barrels and casks are used as tanks.
Tuns and vats are large casks formed of planking hooped at frequent intervals.
Square or rectangular vats are formed either of wood, held together by long bolts, or of slate slabs secured in a similar way.
Compound tanks. Where it is inconvenient to employ or erect one large tank, several smaller ones are connected together by circulating pipes.
Section 87.—THROWING IN AND OUT OF GEAR.
(See also [p. 192].)
[2503]. Presser foot for sewing machines, or for intermittent holding of any flat articles; lifted out of gear, and held by the feather end resting on the sliding socket.
[2504]. Belt shifting bar, adjustable every way.