Henry J Green Model 587 Hair Hygrometer
This is a Henry J Green Model 587 hair hygrometer. It's shown in the 1915 Henry J Green catalog available through this website. The hair is intact but the instrument needs adjusting. The dial is 3 inches in diameter and it is a little over 9 inches tall overall.
Go to Henry J Green catalog page.
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Go to Henry J Green catalog page.
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