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 251
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… … 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…
Drawing instruments · Surveying -- Instruments
Internet Archive Book Images · Canadian Centre for Architecture · No known copyright restrictions (public domain). Free to use for anything.
