Galileo had observed the experimental evidence that a suction pump could only raise water by about nine metres but had given an incorrect explanation based on the "force created by a vacuum".
Galileo had napagmasdan ang experimental na katibayan na ang isang higop pump ay lamang magtaas ng tubig sa pamamagitan ng tungkol sa siyam na metro ngunit nagkaroon na ibinigay ng isang hindi tamang paliwanag batay sa "force na nilikha ng isang vacuum".