Note 41 — BOOK II [THE NATURE OF AIR. THUNDER AND LIGHTNING]
John Clarke translation
The reading at several points is so uncertain that one cannot be at all sure of the meaning. Probably the whole passage is very corrupt. So far as the main theme is concerned, the argument seems to be, As mobility is a presupposition of motion, so tensibility is a necessary condition of actual tension produced in a body by another body. One is tempted to employ “elasticity,” but the term contains implications with which the author was apparently unfamiliar.