94 c H je consequences of the

fist in proportion to its quantity; and that b/actual pressure and contact. That a slenderfilm of air should support a weight greaterthan the maffiest beam could, without touchor pressure, is plainly impossible. Let me en-deavour to render this appearance obviousand familiar, by a plain and easy comparison*If the leaves of a book, all in a parallel situ-ation, and without coming to touch eachother, should support a weight of many thou-sand pounds, even without touching or hav-ing any communication with it 3 no bodywould fay that the power of some other Be-ing was not exerted in performing such aAeffect; for every one of these leaves woul^concur as little in it, as if they were n o lthere. And such an effect is performed houf-ly, constantly} round us, over our heads.

V. If then we lay together what hath beef 1concluded 14, 15,16,17, 26 of thesect. and N° 3 and 4. of this; it follows th^whatever matter is said to attraSl, whateV^matter is said to repel, whatever matter ,ssaid to rejlore itself; whatever matter is heaQpor tends to a center, whatever matter is li£$(which is but comparative heaviness, and