37 Season
480 Episode
The Woodwright's Shop - Season 4 Episode 11 Rittenshouse Hygrometer (2017)
After discussing how humidity affects different wood species, Roy makes a clever and simple late 18th-century hygrometer to measure the humidity in the shop.
- Country : United States of America
- Genre :
- Studio : PBS
- Director :
- Cast : Roy Underhill
