Technical supply co., Scranton. [from old catalog] · Scranton, Pa., Technical supply co · leaf 372
ANEMOMETERSOR WIND GAUGES … 4300 4300. Robinsons Improved and Simplified Anemometer, 3-inch cups,for measuring the velocity of air-currents in mines, sewers, hos-pitals, public and private buildings, etc. Each instrument istested separately, and has a correction table for variations,showing the amount of air, in feet, to be…
Engineering instruments · Drawing instruments
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