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. (1917)
Kolesch & Company · Kolesch & Company · leaf 126
6063 Patent Adjustable Curve Ruler,Each 7-$ .45 Isograph Elliptic French Curve 15.98 31 in. 1.87 … 6064 Isograph Elliptic French Curve each, $ . 50 An 8 inch curve of transparent celluloid, scientifically designed fordrawing any size of isometric ellipses. As shown above, the curvedraws one quarter of the ellipse, and is then shifted to the otherthree quarters. The smaller inside ellipses are…
Drawing instruments · Surveying -- Instruments
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