Much effort and ingenuity was expanded, especially in the eighteenth and nineteenth centuries, to improve the techniques of bloodletting. In the eighteenth century, delicate mechanical spring lancets and scarificators were invented to replace the simpler thumb lancets and fleams. In the nineteenth century, as surgical supply companies began to advertise and market their wares, many enterprising inventors turned their hand to developing new designs for lancets and scarificators, pumps, fancy cupping sets, rubber cups, and all manner of cupping devices and artificial leeches. If we also consider treatments related to bloodletting, in which blood is transferred from one part of the body to another, without actual removal from the body, then we can add the many inventions devoted to dry cupping, irritating the body, and exhausting the air around limbs or even the entire body. Although many physicians continued to use the traditional instruments that had been used for centuries, many others turned eagerly to the latest gadget on the market. Bloodletting instruments, perhaps the most common type of surgical instrument little more than a century ago, are now unfamiliar to the average person. When one sees them for the first time, one is often amazed at their petite size, careful construction, beautiful materials, and elegant design. One marvels at spring lancets made of silver, thumb lancets with delicate tortoise shell handles, and sets of hand-blown cups in the compartments of a mahogany container with brass and ivory latches and a red plush lining. Those finding such instruments in their attic or in a collection of antiques, even if they can determine that the instruments were used for bloodletting, often have no idea when the instruments were made or how they were used. Frequently a veterinary spring lancet or fleam is mistaken for a human lancet, or a scarificator for an instrument of venesection. Almost nothing has been written to describe these once common instruments and to place them in historical context. Historians who study the history of medical theory usually ignore medical practice, and they rarely make reference to the material means by which a medical diagnosis or treatment was carried out. It is hoped that this publication will fill a need for a general history of these instruments. This history is pieced together from old textbooks of surgery, medical encyclopedias, compilations of surgical instruments, trade catalogs, and the instruments themselves.