Appletons' cyclopaedia of applied mechanics: a dictionary of mechanical engineering and the mechanical arts (1880)
D. Appleton and Company, Benjamin, Park, 1849-1922 · New York, D. Appleton · leaf 664
n level as it is sometimes called, is the top of the embankment or the bottom RAILROAD. 688 of the excavation; it receives the ballast and the permanent way,* which latter consists or cross-tiesor sleepers, chairs, rails, fish-plates, frogs, crossings, switches, and fastenings. The width of… … are more than one, the length of sleepers, the slopes of the ballast, and the width of side ditches ifthese arc used. Fig. 8576 shows the cross-sections of the average American single or double-tract roads in fillings and cuttings. The shaded portions represent the ballast, and the dotted lines…
Mechanical engineering -- Dictionaries
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
