A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 228
§17 O^ BUILDINGS. 81 50, The connection of the flat wall pipe to the roundpipe, shown in Fig. 11, is a faulty one. The change of … Fig. 11. direction which the current of air is required to malce, isvery abrupt; the dead end C will also operate to retard the
Architecture · Building
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