What is "foxtail wedging"

Foxtail \Fox"tail`\, n.

1. The tail or brush of a fox.

2. (Bot.) The name of several kinds of grass having a soft dense head of flowers, mostly the species of Alopecurus and Setaria.

3. (Metal.) The last cinders obtained in the fining process.
   --Raymond.

   Foxtail saw, a dovetail saw.

   Foxtail wedging. See Fox wedge, under Fox.