rredfelt, medium weight, swabbedbetween each sheet with hotpitch, then swab the whole sur-face with a good coat of boilingpitch; lay another two plies oftarred felt, swabbed betweenslieets, and a second flowing coatof hot pitch, WTien last coat ofpitch is set, swab on a light coatof hot coal tar,… … Specification No. 2.—Layone ply of dry felt or sheathing,over this four plies of tarredfelt, medium weight, swabbedwith hot pitch between eachsheet, then swab on a flowingcoat of hot pitch. When set,apply light sticking coat of coaltar and cover to f of an inchwith clean gravel. A—Dry Felt or…
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