[Larger plate.]

[1112]. Indiarubber sheet joint for the tubes of condensers, the rubber being pressed around the tube joints by a plate with projecting rings. See [Plate], [page 139].

[1113]. V-ring metallic gland packing. See [Plate], [page 139].

Joints of plane surfaces are usually made with red-lead for steam and water; asbestos, millboard, and sometimes rubber insertion, tape, paper, or wire gauze for steam, water, air, &c.

Section 59.—PROPULSION.

(See also [Sections 60], and [12].)

On land, vehicles, &c., may be propelled by:

a.

Any engine having contained in itself its source of power; such as a steam engine, compressed-air engine, electric motor, &c.