Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 581
of common mortar, or ofcement, with a finish of Keenes cement, which admitsof washing. Figs. 1351 and 1352 are elevation andsection of a Phoenix column with a porous terra-cottacovering; Figs. 1353 and-1354, a similar covering ap-plied to a square and round post. Fig. 1355 shows in perspective the…
Mechanical drawing
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