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. (1907)
Kolesch & Company · Kolesch & Company · leaf 45
1140 Swiss Proportional Dividers, 9 in., finely divided for lines, circles, planes and solids, with micrometer adjustment each, til, 50 1141 Proportional Dividers, No. 1140, in morocco case 2g 0o … 1145 Kerns Improved Proportional Dividers are graduated in such a manner that by theaid of a table furnished with each instrument, any desired proportion may be sp<«d.lvand accurately set off. Divisions, by means of a vernier, read to 1,0,„,;,, 1145 Kerns Improved Proportional Dividers, 10 in.,…
Drawing instruments · Surveying instruments
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