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Scientific American, Vol. 90, No. 13 (March 1904) (1904)

leaf 3

An illustration from Scientific American, Vol. 90, No. 13 (March 1904), 1904, leaf 3
both the interior and point of concrete, as shown exterior works, forms a in Fig. 2 A. is substituted part, of the exhibit. The for the fixed steel point, actual position of coal and driven to the required seams under the surface depth. As the pipe is is shown by means of cross lifted out, concrete… … Various Systems of Concrete Pilim?. Preparatory Pile Removed, Leaving Hole Ready lor Concrete. CONCRETE PILING, © 1904 SCIENTIFIC AMERICAN, INC

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