It's an elephant prod made the Sabu Co. of Goa, India prior to WW1 Abusive comment hidden. (Show it anyway.)
It's a 1918 Pavlovian rodent experimental device created by Johnson and Meadows for Columbia University. They made similar devices Yale and Andover. Abusive comment hidden. (Show it anyway.)
It's a early model of the Bailey "Far-Tometer" used to measure the weight and speed of gasses. Abusive comment hidden. (Show it anyway.)