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.
Siphon
Siphons were studied further in the 17th century, in the context of suction pumps (and the recently developed vacuum pumps), particularly with an eye to understanding the maximum height of pumps (and siphons) and the apparent vacuum at the top of early barometers. This was initially explained by Galileo Galilei via the theory of "horror vacui" ("nature abhors a vacuum"), which dates to Aristotle, and which Galileo restated as "resintenza del vacuo," but this was subsequently disproved by later workers, notably Evangelista Torricelli and Blaise Pascal – see barometer: history.