It looks like there is a flame coming out of the center top of it. Is that what I am seeing? Is it some kind of old bunsen burner or some kind of burner used to heat things in test tubes up?
The scarificator was designed in the early 1700s as a more merciful bloodletting device. At the flick of the release lever, multiple blades shot out to create an instantaneous series of parallel cuts. Raising and lowering the base with the knob on the top could adjust the cutting depth of the thirteen blades of this octagonal scarificator.