Reference > Brewer’s Dictionary > Vac’uum Boylea’num.

 VacuumVa’de Mecum [a go-with-me]. 
E. Cobham Brewer 1810–1897. Dictionary of Phrase and Fable. 1898.
Vac’uum Boylea’num.
Such a vacuum as can be produced by Boyle’s improved air-pump, the nearest approach to a vacuum practicable with human instruments.   1
        The Guerickian vacuum is that produced by ordinary air-pumps, so called from Otto von Guericke, who devised the air-pump.
        The Torricellian vacuum is the vacuum produced by a mercury-pump.

 VacuumVa’de Mecum [a go-with-me]. 


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