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Hooke, Robert, 1635-1703 / Micrographia: or some physiological descriptions of minute bodies made by magnifying glasses : with observations and inquiries thereupon
(MDCLXVII [1667])
Observ. XXVII. Of the beard of a wilde oat, and the use that may be made of it for exhibiting always to the eye the temperature of the air, as to driness and moisture, pp. 147-152
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