The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

Section 73.—RAIL AND TRAM ROADS.

(See also [p. 156].)

[2416]. Centre rail, with friction grip for moderate inclines.

Rack railways for steep inclines of an angle, in some cases of 40°, are made with central rack rails (in addition to the ordinary rails), and the engines have steel gearing, which gears into the teeth cut in the rack rail.

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