The various preparations of insulin available for prescription vary in onset, intensity, and duration of action. Animal source insulins, pork and beef, have been discontinued in the U.S. market. Human insulin is derived by recombinant DNA technology and is termed quick acting, intermediate acting, or long acting.
The pole lathe was invented sometime before the 13th century AD. Although it represented a great advance the pole lathe was not that much more complicated than its predecessors. The differences consisted of a framework to raise the bed of the lathe clear of the ground, the addition of a pole and a treadle.
Historical Examples. 1  A full complement of men worked at every lathe, table, drill or saw. 2  The lathe painted to look like iron is seen to be but a lathe. 3  A lathe tool, if merely hardened, would be useless for that purpose. 4  The arc of the curved end depends on the kind of lathe and the size of the work.