The Barometer
The Barometer is made up of a tube and dish full of mercury. Mercury is a dense liquid metal. The Barometer led to the development of meteorology and electricity.
Vacuum Pump
Miners had trouble pumping water out of mines. Robert Boyle made the vacuum pump better. Vacuum pumps are used in air conditioning. A vacuum pump sucks up air.
The Minute Hand
It reduced clock error down to 15 seconds per day. The minute hand appeared in 1690. It was adopted almost immediately by everyone. They began replacing the pendulum clock by the 1940s.
Robert Boyle was born in 1627 and studied Galileo's work. He rejected the greek view of four elements. He believed in science as a way to glorify God. He is one of the founders of chemistry and the scientific method.
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