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

Chapter CXLI: Section 73: Rail and Tram Roads

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(_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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The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purposeChapter CXLI: Section 73: Rail and Tram Roads

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