A treatise on architecture and building construction (1899)
International Correspondence Schools · Scranton, The Colliery engineer co. · leaf 169
the symbol, and connectedto it by a light line; thus, atj we have a drop pipe |- inch indiameter, descending 4 feet 6 inches to center of fitting; at^ we have a riser f inch in diameter, ascending 8 feet 2inches; at / we have a riser 1^ inches in diameter, ascending3 feet 4 inches, and a drop pipe… … IG PLUMBING AND GAS-FITTING. 139
Architecture · Building
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