ction is very economical, and calculated to last 15 years beforeany of the blocks will require replacing ; (it would be far better if theveitical pieces were fixed with the smaller end downward, they wouldthen act like a wedge.—Editor.) -*- ? Fig. 5 is a section of the railway from Amboy to Camden,… … Fig. 5. pfcflglg^^g
Civil engineering · Architecture
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