Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . ickel plated trimmings. lOths or 12ths: 25 50 75 100 feet long Each $ In ordering, please state whether lOths or 12ths are tape can be used for all kinds of measurements and also for lay-ing out right angles much quicker than by any other method and equallyaccurate. Its principle is the old trigonometrical formula that 6, 8 and 10ft. sides of a triangle secure a righ
Illustrated catalogue and price-list of drawing and tracing papers, sun print papers and equipments, drawing instruments and materials, surveying instruments, accessories, etc / Kolesch & Company. . ickel plated trimmings. lOths or 12ths: 25 50 75 100 feet long Each $ In ordering, please state whether lOths or 12ths are tape can be used for all kinds of measurements and also for lay-ing out right angles much quicker than by any other method and equallyaccurate. Its principle is the old trigonometrical formula that 6, 8 and 10ft. sides of a triangle secure a right angle. This form is embodied in thetape, by providing it at the 1, 9, 19 and 25 ft. marks with eyelets, the 9 and19 ft. marks also with joints. To use the tape, fasten it at the starting pointwith a small marking pin or nail through the eyelet at figure 1 on tape;then fasten it at figure 9 as shown in illustration; place the 25 ft. mark overthe starting point and taking hold of the tape at the 19 ft. mark pull itstraight as shown in cut. You will then have a perfect right angle at thestarting point. The advantages of this tape are obvious. A perfect rightangle is obtained in a few 8524 Roes Steel Tape Chains, 3-16 in. wide, on metal reel: 50 inO 200 300 500 feet Plain $ Nickel Plated Aluminum Plated Tapes 50, 100, 200 feet long, graduated every foot. End foot in 300, 500 feet long, graduated every five feet. End foot in only, for 50 and 100 foot tapes each, $ ?
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Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
