191
OF ENGINEERING FOKMULÆ.
6. Records should be carefully kept of the work
performed by the wearing parts of the rolling
stock, to afford practical information in regard to
them, and to prevent them from being retained in
use longer than is desirable.
7. When a line is worked by telegraph, the
telegraph huts should be commodious, and should
be supplied, with clocks, with record books, with
a separate needle for signalling the trains on each
line of rails, and with an extra needle for other
necessary communications between the signalmen.
The telegraph instruments and signal handles
should face the directions in which they work.
8. When drovers or other persons are permitted
to travel with goods or cattle trains, suitable
vehicles should be provided for their accommoda-
tion near the front of such trains.
9. Luggage should not be carried on the roofs
of railway carriages.
Regulations for Construction of Prussian
Railways and Rolling Stock.
RAILWAY.
Minimum breadth of roadway, double line.. .. 24 ft. 9 in.
Ditto ditto, single line .. .. 15 ft. 6 in.
Maximum gradient, level districts ..........1 in 200
Ditto ditto, hilly ditto .. .........1 in 100
Ditto ditto, mountainous ditto ., .. 1 in 40
Minimum radius of curves, flat ditto........ 3600 feet
Ditto ditto, hilly ditto ................... 1200 feet
Ditto ditto, mountainous ditto .. .. 600 feet
Maximum gauge for straight lines and curves of
more than 1000 feet radius................4 ft. 8| in.
Maximum gauge round sharp curves............ 4 ft. 9| in.
Minimum width of top table of rails ., .. ., 2J inches
Radius of ditto.........................from 1" to 5 in
Minimum depth of rails......................4; inches
Inclination of rails inwards................1 in 20
Minimum depth of ballast under sleepers .. ,. 8 inches