Show influence of forests proved by experiment forests influence the amount of moisture in the air is as well as conserve the water in the ground humidity records taken ly by the pacific northwest forest experiment station in a douglas fir forest before anil and after the trees yere were cut indicated n remarkable difference in atmospheric humidity according to the forest service united states department of agriculture in the forested area the relative humidity fell below 35 per cent in only one third its sa many hours as in an open area nearby after the forested tract was cut over the atmosphere above it appeared to become almost as cry as that over the open space the tests showed that the removal of the trees increased the lie number of cof hours during which the humidity was below 35 per cent by two and one me halt half times |