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.
A chuckless drill is an easy tool to use for smaller jobs. Jupiterimages/Photos.com/Getty Images. A drill chuck is the part of the drill that holds the rotating bit in place. A drill chuck key is a small, ridged tool that fits into the grooves of the chuck to tighten and loosen the chuck.