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. . 8522 Mason Squaring Foundation with *RoesPatent Angle Tape. Roes Patent Angle Steel Measuring Tapes, % inch steel. Hardleather case with nickel 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 an
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. . 8522 Mason Squaring Foundation with *RoesPatent Angle Tape. Roes Patent Angle Steel Measuring Tapes, % inch steel. Hardleather case with nickel 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 ha
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Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
