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.
A drilling machine, called a drill press, is used to cut holes into or through metal, wood, or other materials (Figure 4-1). Drilling machines use a drilling tool that has cutting edges at its point.
Most dewatering filter presses are sometimes called plate-and-frame filters, but this term accurately describes only a certain style of filter plates in wide use during the mid-to late-1800s.he filter press can also be employed as a polishing filter intended to remove very small concentrations of solids from an influent stream. When used for polishing, the press size is chosen to provide optimal filtration area and hydraulic throughput.