hygrograph
hy·gro·graph
H0352500 (hī′grə-grăf′)hygrograph
(ˈhaɪɡrəˌɡrɑːf; -ˌɡræf)hy•gro•graph
(ˈhaɪ grəˌgræf, -ˌgrɑf)n.
n.
hygrograph
hygrograph
[′hī·grə‚graf]Hygrograph
an instrument for continuously recording the relative humidity of the air. The sensitive element of a hygrograph is a bundle of degreased human hair or organic film (see HYGROMETER). Recording is done on a calibrated ribbon mounted on a drum, which is rotated by a clock mechanism. The drum on a hygrograph may rotate once a day or once a week.
hygrograph
hygrograph
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