Smellie's double crochetSmellie, William (1697-1763)Thoms, Herbert (1885-1972)Smellie devised a double crochet that could be used as a single crochet. It is simple in design much like a forceps except that it has a sharp tooth at the end of each slim blade. This tooth could pierce and be embedded in the head of a fetus for removal.still image