'Tis incredible to tell how it will strike large Oaks, shatter and shiver them, sometimes twisting round a Tree, sometimes as if it struck the Tree backwards and forwards. I had noted a fine spreading Oak in _James Town_ Island, in the Morning I saw it fair and flourishing, in the Evening I observed all the Bark of the Body of the Tree, as if it had been artificially peel'd off; was orderly spread round the Tree, in a Ring, whose Semidiameter was four Yards, the Tree in the Center; all the Body of the Tree was shaken and split, but its Boughs had all their Bark on; few Leaves were fallen, and those on the Boughs as fresh as in the Morning, but gradually afterwards withered, as on a Tree that is fallen. I have seen several vast Oaks and other Timber Trees twisted, as if it had been a small Willow that a Man had twisted with his Hand, which I could suppose had been done by nothing but the Thunder. I have been told by very serious Planters, that 30 or 40 Years since, when the Country was not so open, the Thunder was more fierce, and that sometimes after violent Thunder and Rain, the Roads would seem to have perfect casts of Brimstone; and 'tis frequent after much Thunder and Lightning for the Air to have a perfect Sulphurious Smell. Durst I offer my weak Reasons when I write to so great Masters thereof, I should here consider the nature of Thunder, and compare it with some Sulphurious Spirits which I have drawn from Coals, that I could no way condense, yet were inflamable; nay, would burn after they pass'd through Water, and that seemingly fiercer, if they were not over-power'd therewith. I have kept of this Spirit a considerable time in Bladders; and tho' it appeared as if they were only blown with Air, yet if I let it forth, and fired it with a Match or Candle, it would continue burning till all were spent. It might be worthy Consideration likewise, whether those frequent Thunders proceeded from the Air's being more stagnant, the motion of the Winds being impeded by the Trees, or whether the motion of the Winds being obstructed by them below, the motion might not be more violent aloft; and how far that may promote inflammability, for Stacks of Hay or Corn that ferment with moisture, never burn, unless when brisk Winds blow, that agitate and fan the little fermenting Sparks, and often kindle them into an actual Fire. And Observance of the Meteors there might perhaps not be Impertinent, as both what are more rare, and what are more frequent, as of _Gosimore_ in great abundance, and of those small Cob-webs in a Morning, which some have supposed to be Meteors. _Ignes fatui_, tho' there be many boggy Swamps and Marshes, are seldom, if any are seen there. There be frequent little sorts of Whirl-winds, whose Diameter may be sometimes not past two or three Yards, sometimes forty, which whisking round in a Circle, pass along the Earth, according to the motion of the Cloud, from whence they issue; and as they pass along