April 29, 1777

Posted by sydney on Apr 29th, 1777

The bark of oak now runs; & I am felling some trees.  Wwen trees are sawn-off, & thrown, a rushing sound is heard from the but, often attended with a little frothing & bubbling-out of the sap.  This rushing or hissing is occasioned by the motion of the air escaping thro’ the vessels of the wood.

April 1777
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