San Francisco : Architect and Engineer, Inc · leaf 287
Board, the War Manpower Commission, theOffice of War Mobilization and Reconversion, theOffice of Defense Transportation, and any othergovernment agency whose activities have a majorbearing on the conversion of construction. PLEXIGLAS DISKS SPEEDAND SIMPLIFY SPLINING An ingenious device for speedily… … Rohn and Haas Co. photo pelling the transparent plastic disk along the edgeof the spline or French curve. Mr. Jackson hasdesigned a graduated set of disks, selected totake care of ordinary requirements in splining. With the new Jackson instrument there is nolost motion and a line parallel to the…
Architecture · Building
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![An illustration from Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)](https://img.insideoutlibrary.com/img/200/ia-cu31924022817674-156-44.webp)
