Every boy's book of railways and steamships (1911)
Protheroe, Ernest · London : Religious Tract Society · leaf 78
train engines have larger wheels thanthose engaged in goods traffic; the former mayhave one pair of driving wheels or two pairscoupled together, whereas the goods engine willprobably have three or four pairs of same-sizedwheels aU coupled. The small goods-engine wheelsrevolve more quickly at any…
Railroads · Steamboats
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