Stopwatch.

A booster. This device includes a pump that draws gasoline from a car's tank to an intermediate tank that feeds the engine by gravity and a fuel gauge. This system had the advantage of limiting fire risks.

A booster. This device includes a pump that draws gasoline from a car's tank to an intermediate tank that supplies the engine by gravity and a fuel gauge. This system had the advantage of limiting fire risks.

Mechanical ancestor of our calculating machines

First direct-keyboard calculating machine, invented in the United States

Chestnut jam