The Chain Saw and the Chain Saw in Childbirth and Neurosurgery

The first of these inventions was devised in the early 1780s by Scottish surgeon, John Aiken. The second was devised by Scottish surgeon James Jeffrey as a means of removing diseased joints without having to result to full limb removal. And then you end up with this thing that was called an osteotome. This was a hand cranked version of this that essentially had an infinite chain loop on it. You'd crank it and you would have essentially would function like a little chain saw.