An extract of a letter of M. Hugens to the author of the journal des scavans of July 25. 1672. attempting to render the cause of that odd phænomenon of the quicksilvers remaining suspended far above the usual height in the torrisellian experiment

Abstract

The Experiment is briesty this; That a Tube, being, after the Torricellian way, filled with Mercury, and before inversion perfectly purged of Air, doth, when inverted, remain top full, even to the height of 75 inches.