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.
The BLACK BULL 6 Ton A-Frame Shop Press features all welded steel construction with a powder coated paint finish. The 6 ton hydraulic jack has an operating distance of 2 in. to 4.3 in. 1  Used to install and remove bearings, gears, U-joints, bushings, ball joints, pulleys and other items.  Spring-return ram speeds up work.