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.
These are used for drilling a range of sizes of hole and they are very useful especially if machine drills are not available. The hand drill generally holds drill sizes from 1mm to 9mm whilst the brace will hold larger drill bits called forstner bits and auger bits. These larger bits can be used to drill blind holes (holes that do not go the entire way through material).