Cyclopedia of architecture, carpentry, and building : a general reference work ... (1907)
American School of Correspondence · Chicago : American Technical Society · leaf 186
the upper tube projects into the body under whichthe scoop e d c turns right and left to throw the rain water intoeither elbow as desired. The pattern for the upper piece A T U Mis a straight piece of metal whose circumference is equal to N. For the pattern for (A), divide the half section O P R… … 149 78 SHEET METAL WORK lines Just drawn intersect the corner //, it will be necessary to ob-tain this point on the half section O P R from which the stretch-out of the pattern is taken. Therefore from //, parallel to LKdraw li Ji intersecting II K at //, from which, parallel to K J, dropa line…
Architecture · Building · Carpentry
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