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.
How to Use a Drill Press Machine: A drilling machine comes in many shapes and sizes, from small hand-held power drills to bench mounted and finally floor-mounted models. They can perform operations other than drilling, such as countersinking, counterboring, reaming, and tapping large or small holes.
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.