_Table-moving._--Was not Bacon acquainted with this phenomenon? I find in
his _Sylva Sylvarum_, art. MOTION:
"Whenever a solid is pressed, there is an inward tumult of the parts
thereof, tending to deliver themselves from the compression: and this
is the _cause_ of all violent motion. It is very strange that this
motion has never been observed and inquired into; as being the most
common and chief origin of all mechanical operations.
"This motion operates first in a round by way of proof and trial, which
way to deliver itself, and then in progression where it finds the
deliverance easiest."