Building construction; In two volumes

 
9781235969904: Building construction; In two volumes
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 Excerpt: ...punched over. (3) Picked (G, Fig. 44, bottom): a scabbled face worked over with the pick. (4) Close picked: the same process carried farther. (5) Single axed: so called to distinguish it from patent axed: a picked face worked over with the axe to a face similar to that of boasted work on freestone. (6) Fine axed: finer and closer work of the same description. (7) Tooth axed: punched or picked face worked over with a tooth axe. (8) Bushed or bunched: close picked reduced to a finer surface with a bush hammer. (9) Patent axed: an axed face worked finer with the patent axe. Patent axed faces are called 4-face, 6-face, etc., according to the number of blades to the inch used in the tool, the finest being 10-face. (10) Sanded. (11) Polished. The process in sanding is the same as that in rubbing freestone, but takes very much longer unless krushite (chilled steel filings) is used. Polishing is done by a further rubbing with emery powder and a final glossing with a rubber covered with felt and oxide of tin putty. Ordinary beds and joints in granite are usually cleft faces finished by a little work with the pick or punch where required. The fine beds and joints of polished work are patent axed. Dressing Flint A gauged or knapped flint for facing is produced by knocking off cores or quarters 8 inches to 12 inches across, and 4 inches to 6 inches thick, from a large stone, sometimes 2 feet or 3 feet across, and then knocking off flakes from the margins of a core until a rough pyramid is left, with a rectangular base from 2 J inches to 3 inches across, which is then neatly chipped round until the edges and angles are true. The base of the pyramid is the face of the stone, which should be 4 inches or 5 inches long, so as to tail well into the work. Short-handled hammer...

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