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Dimensions: 19
focusing resistance
Weight: 10
25" stereo slides
At this intersection the index hand will point to the relative humidity on the scale at the bottom of the chart
1902 Tyco's 1300A Lloyd's Hygrodeik (Early Model) precision Dimensions: 19A very early, rare, and functional Tyco's Lloyd's Hydrodeik. Dated 1902, this hygrometer uses a wet bulb thermometer (left) and dry bulb thermometer (right), with an adjustable pointer to read relative humidity and dew point temperatures via engraved nickel silver plate. The body is comprised of an olive painted brass. US Made, Manufactured Rochester, NY. In the early days of meteorology, scientists or learned professionals would use these readings,
