it in any Degree, unlefs under particular Restrictions, and as the Refult of an agreeable Mixture and Variety of Incidents. Therefore we fhall, for the present, leave thofe Fields of Æther, where Suns refulgent fhine, and Planets and Comets go their ample and folemn Rounds; and defcend to the nether Regions of Air, a ftupendous Inftance of divine Omnipotence; and whose wonderful Properties are highly worthy your Notice and Attention. There we fhall fee how every Part is duly ordered to render it as ufeful as it is neceffary.-—We fhall find it the natural Means of Life to Animals and Vegetables -The Medium for propagating Sounds.

-The Method, that Nature has taken to render all Objects vifible unto us, by making it the general Receptacle of Light.- -The Medium of Flying, and the Habitation of numberlefs Animals of the winged Kind. -That Medium which alone affords the proper Pabulum of Fire and Flame.- --The Element and Effence itself of Winds, Storms, and Tempefts.--The Medium in which alone Vapours and Exhalations can have any Exiftence. And laftly, The natural Means and Caufe of all Kinds of Meteors, watery or fiery, fuch as Fogs, Clouds, Rain, Snow, Hail, Thunder, Lightening, the Aurora Borealis, &c.