Every boy's book of railways and steamships (1911)
Protheroe, Ernest · London : Religious Tract Society · leaf 109
ad set in, and, in the year1846 alone, Parliament gave permission for theconstruction of 272 new lines. When the track has been levelled the rails arelaid. First come the sleepers, blocks of wood, 9feet long, 10 inches wide, and 5 inches deep, whichare laid down at regular intervals at right… … 1. BRITANNIA TUBULAR BRIDGE. 2. FORTH BRIDGE. HOW A RAILWAY IS WORKED 85 are laid. The present rails are of steel, 60 feetlong and weighing from 75 to 100 lbs. per yard,according to the nature of the traffic they willhave to carry. Each rail is wedged into the chairs,and the ends of the metals are…
Railroads · Steamboats
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