Identifier: IllustratedCatalogueAndPrice-listOfDrawingAndTracingPapersSunPrint (find matches)
Title: 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.
Year: 1917 (1910s)
Authors: Kolesch & Company
Subjects: drawing instruments drafting instruments surveying -- instruments
Publisher: Kolesch & Company
Contributing Library: Canadian Centre for Architecture

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eansof the set screws. Screws. Clamp and tangent screws are attached to and directly un-derneath the telescope bar, which position renders them less liable toinjury than any other, and makes them easily accessible to the hand.Tangent screw of improved construction with counterspring. Weight of level without tripod, about 10j/> Ihs. Instrument complete, in finely polished box, with adjustingpins, gossamer bag and tripod No. 7400 each, $100.00 7821 Same as No. 7820, but with telescope 15 inches long..each, 90.00 7822 Same as No. 7800, but with telescope 20 inches long..each, 110.00 7823 Same as No. 7800, but with telescope 22 inches long..each, 120.00 Optional Additions to Either of Above Y Levels, To Order Only. Steel centers in place of the regular centers $10.00 Astronomical (inverting) eye-piece, instead of erecting 10.00 Three leveling arms, instead of four arms 15.00 C-£- OUR IRON CLAD GUARANTEE, see page 196. 248 KOLESCH <fc CO. fiQy^ NEW YORK. Kolesch Dumpy Level No* 7830
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7830 Dumpy** Level with powerful achromatic terrestrial (erecting)telescope 18 inches long. Magnifying power about 28 diam-eters which we have found to be the best for held and defini-tion both of which are liable to be lost when using excessivemagnification. Will focus 8 feet from the instrument.Lenses of the very best domestic make. Aperture of objectglass IH inch. Improved rack and pinion movement to ob-jective. Eye-piece adjustable for focusing the cross-hairs.Bubbles. Very finely graduated bubble of 30 seconds sensi-tiveness, graduated on the glass attached to the telescope bar.Centers are made of phosphor bronze and very stout and long.Telescope Bar and Rings are of an improved construction de-signed to produce a very strong instrument, which is not liabletcT get out of adjustment under the most severe conditions.The Four Leveling Arms are slotted and can be adjusted bymeans of the set screws. Screws. Clamp and tangent screws are attached to, and^ di-rectly underneath the telesc

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