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. . 8061 8063 8061 BiranVs Pocket Anemometer. Extra strong construction, 2inch. Two dials reading to 1,000 feet. Weight ST/2 leather each, $ 8063 Portable Anemometer, 2l/2 inch, 4 dials reading to 100,000 feet, with disconnector and zero setting device, in .each, 8064 Same as No. 8063, but 6 dials reading to 10,000,000 , Glass Timers attached to N
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. . 8061 8063 8061 BiranVs Pocket Anemometer. Extra strong construction, 2inch. Two dials reading to 1,000 feet. Weight ST/2 leather each, $ 8063 Portable Anemometer, 2l/2 inch, 4 dials reading to 100,000 feet, with disconnector and zero setting device, in .each, 8064 Same as No. 8063, but 6 dials reading to 10,000,000 , Glass Timers attached to Nos. 8063 and .extra, KOLESCH & CO. |^JJM^ NEW YORK. 269 Anemometers or Air Meters ROBINSONS IMPROVED by Short & Mason, The improvement consists, first, in a rearrangement of the workswhich admits of the column carrying the arms and cups, rising fromthe center of the base, and secondly, an arrangement by which the enu-meration is affected by two hands which can be set to zero on the com-mencement of an observation, thus obviating the necessity of taking areading of the dials before proceeding to make a fresh observation. Another improvement is the recent introduction of ball-bearings tothe central shaft by which the friction is reduced to a minimum and thewearing of the instrument prevented. 8071 Robinsons Anemometer as above, with 3 inch cups, reading to 500 miles, complete .each, $ 270 KOLESCH <fe CO. &*K\ NEW YORK. The Portable Current Meter.
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Keywords: ., bookcentury1900, bookdecade1910, bookidillustratedc, bookyear1917
