Miller, Kempster Blanchard, 1870-1933 · New York : McGraw publishing company · leaf 862
the regular tiles, the lengths being soshort as to form a practically smooth interiorsurface. This conduitis laid in much the same way as ordinary brick, and in order toinsure proper ahgnment a mandrel (shown in lower portion of Fig.617), three inches in diameter and about thirty inches long, is… … FIG. 617.-SINGLE-DUCT CONDUIT AND MANDREL. conduit, which effectually smoothes the inner surface and pre-vents the formation of lips which might prove injurious to thecable sheaths in drawing in. On the front end of the mandrel isprovided an eye which may be engaged by a hook carried by theworkmen…
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