Worthen, William Ezra, 1819-1897, [from old catalog] ed · New York, Appleton · leaf 578
n cement.Fibrous hemlock boards prevent the gnawing of ratsand mice. The fireproof of old builders consisted simply ofplain cylindrical or groined arches (Fig. 1342) instone or brick masonry or concrete. Figs. 1343 to 1347 are illustrations of Komanconstructions in masonry, from Dictionnaire… … Fig. 1342.
Mechanical drawing
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