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Image Credit
/-/https/www.sciencebuddies.org/cdn/Files/13316/7/hygrometer-before-calibration-with-labels.jpg)
Description:
The assembled hygrometer has a pointer attached to a wooden panel with a nail. A hair connects the far end of the pointer with a second nail.
Source:
Sabine De Brabandere, Science Buddies
License:
Science Buddies
/-/https/img.youtube.com/vi/sya89Et3Go0/0.jpg)
/-/https/img.youtube.com/vi/b1pvMBIhYjE/0.jpg)
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