Because of the First World War, Wegener's book went unnoticed outside Germany. In 1922, however, a third (revised) edition was translated into English, French, Russian, Spanish, and Swedish, pushing Wegener's theory of continental drift to the forefront of debate in the Earth sciences.
A drilling machine, called a drill press, is used to cut holes into or through metal, wood, or other materials (Figure 4-1). Drilling machines use a drilling tool that has cutting edges at its point.
This mortising bit and chisel set works with any standard drill press mortising attachment or mortising machine to help you create mortise and tenon joints easier than ever! The mortising bit and chisel set is an essential tool for any woodworker looking to join wood pieces together with professional results. 1  3/4 in. 2  Cuts square holes for mortise and tenon joints. 3  1/2 in. auger.