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.
Get accuracy and power with a new drill press. A drill press is key to any workshop. Their speed and precision allow them to work on almost any material. Sears carries models with laser guides and spotlights to help increase the accuracy of your drill. Floor drill presses will give you a sturdy place to work.