A real Babbage engine recently built to prove that the machine could have been manufactured in Babbage's time. A number of errors in the blueprints were detected and corrected that would have caused the gears to sieze by acting against each other. Babbage's motive was to correct lethal errors in the logarithmic tables used for navigation. This machine can compute 7th order polynomials to 30 digits of precision.
The first dialysis machine. Later models used plastic shirt wrappers as filters.
Original MRI prototype, 1971
The biker's credo as rendered by James Watt.
Early radio transmitter
An early analog computer, or if you view it properly, qualitative reasoning engine. The black rods are valves that can be set to give values for economic independent variables such as interest rates. A red fluid flowed through the system. The quantity of fluid in the reservoirs gives dependent variable values, such as gross national product.The reservoirs did not contain guages, making this a physically realized qualitative reasoning engine.
19th century lithotripsy kit for crushing and extracting bladder stones without making an incision.