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. . e direction. Verniers. Two opposite verniers (at 30 deg. to the telescope) readingto 30 seconds (see page 201). Ground glass shades attached to both ver-niers. Compass, divided on Solid Silver to half degrees, with improved barneedle 4y2 inch. With variation plate and capstan head for setting same. Weight of instrument without tripod, about 13 lbs. Instrument complete, in finely polished box, with
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. . e direction. Verniers. Two opposite verniers (at 30 deg. to the telescope) readingto 30 seconds (see page 201). Ground glass shades attached to both ver-niers. Compass, divided on Solid Silver to half degrees, with improved barneedle 4y2 inch. With variation plate and capstan head for setting same. Weight of instrument without tripod, about 13 lbs. Instrument complete, in finely polished box, with plumb bob,reading glass, center key, adjusting pins, gossamer bag and tripodNo. 7400 each, $ 7602 Same as No. 7600, but with horizontal limb plate 6*/2 in., each, 205,00 Optional Additions to Either of Above Transits, To Order Only. 20 seconds verniers, instead of 30 seconds $ Astronomical (inverting) eye-piece, instead of Three Leveling Arms instead of four arms Magnifying glasses attached to verniers on limb plate 60 seconds verniers, at same price as Nos. 7600 and 7602. ® OUR IRON CLAD GUARANTEE, see page 196. 22o KOLESCH <fc CO. $*Ypk NEW 7610 Extra Fine Quality Transit, with Vertical Arc. (For description see page 23l) KOLESCH & CO. NEW YORK. 221 Kolesch Transit No. 76JO Extra Fine Quality. 7610 Extra Fine Quality Transit, for high-grade work requiringextreme accuracy and precision. Bent Standards. With powerful achro-matic terrestrial (erecting) telescope about 11 inches long. Magnifyingpower about 24 diameters. Will focus 5 or 6 feet from the instrument,which is very convenient on short offsets. Lenses are especially made andselected by the best European optical works. Aperture of object glass1 3/16 inches. Dust Cap and Sun Shade. Improved rack and pinion move-ment to eye-piece and objective. Fine bubble (4# in. vial) of 30 secondssensitiveness, graduated on the glass and attached to the extreme end oftelescope. This pos
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