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.
In the conventional rotary drilling process, a drilling bit on the lower end of a drill pipe is turned by a rotary table, boring through layers of rock at several hundred revolutions. Drill collars are used to increase the drilling pressure. Jetting liquid is used to cool the rotary drilling bit and transport the drilling material to the surface. Modern drilling rigs on the other hand work with a so-called top drive suspended by a hoist on the derrick.