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Is it a surprise that into the vessel, in which the mercury has no inclination and no repugnance, not even the slightest, to being there, it should enter and should rise in a column high enough to make equilibrium with the weight of the external air which forces it up?

— Evangelista Torricelli

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More quotes by Evangelista Torricelli

Many have argued that a vacuum does not exist, others claim it exists only with difficulty in spite of the repugnance of nature; I know of no one who claims it easily exists without any resistance from nature.

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Quote text and notes from Wikiquote: Evangelista Torricelli (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.