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.
The buttonholer's adaptor attaches to the machine's presser bar, replacing the presser foot. In its place the buttonholer employs a cloth clamp with teeth on the underside to hold the material firmly whilst manipulating the cloth side to side and forwards and backwards.