Vacuum cleaner
The vacuum cleaner evolved from the carpet sweeper via manual vacuum cleaners. The first manual models, using bellows, were developed in the 1860s, and the first motorized designs appeared at the turn of the 20th century, with the first decade being the boom decade.
Gasparo Berti
In 1630, Giovanni Battista Baliani sent a letter to Galileo Galilei after he noticed that his siphon could not raise water more than about 10 m (34 feet). Galileo proposed that a vacuum held the water up and that it could not hold any more. At the time the existence of vacuums was controversial.