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.
Affordable Drill Presses. Choose between a line of heavy-duty bench top or floor mount drill presses from Northern Tool. Expect nothing less than power, accuracy and versatility from these machines. Floor press head tilts 70Â° left and 90Â° right allowing you to maneuver hard-to-move work pieces.