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Description: | FOR SCREEN, SHELTER OR MASON'S HYGROMETER USE OTHER SIDE FOR WHIRLING, SLING OR ASPIRATED HYGROMETER
Put SETTING LINE to Dry Bulb on Temperature Scale Select Wet Bulb on Temperature Scale and read off Percent Relative Humidity' MADE IN ENGLAND
TEMPERATURE SCALE OF...
Ruler for surveying instrument. | Publisher: | "http://collections.rmg.co.uk/" | Source: | Royal Museums Greenwich | Identifier: | http://collections.rmg.co.uk/collections... | Go to resource |
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