caption: The image shows a black and white drawing of a machine with a clock on it, which is believed to be a mechanism used to measure the speed of an object. The machine has a cylindrical shape with a handle on one side and a wheel on the other, and the clock has a face with two hands and a pendulum. The wheel is connected to the machine by a series of gears and cogs, which are used to control the speed and direction of the object.