And first, I do not think it improper to look back to the preceding Seasons of the Year. I scarce believe I shall go out of the way, to reflect as far back as _April_, _May_, _June_ and _July_; because all these were wet Months in our Southern Parts. In _April_ there fell 12,49 _l._ of Rain through my Tunnel: And about 6, 7, 8, or 9, _l._ I esteem a moderate quantity for _Upminster. In_ May _there fell more than in any Month of any Year since the Year 1696_, viz. 20,77 _l. June_ likewise was a dripping Month, in which fell 14,55 _l._ And _July_, although it had considerable Intermissions, yet had 14,19 _l._ above 11 _l._ of which fell on _July_ 28_th_ and 29_th_ in violent Showers. And I remember the News Papers gave Accounts of great Rains that Month from divers Places of _Europe_; but the _North of England_ (which also escaped the Violence of the late Storm) was not so remarkably wet in any of those Months; at least not in that great proportion more than we, as usually they are; as I guess from the Tables of Rain, with which Mr. _Towneley_ hath favoured me. Particularly _July_ was a dry Month with them, there being no more than 3,65 _l._ of Rain fell through Mr. _Towneley's_ Tunnel of the same Diameter with mine. From these Months let us pass to _September_, and that we shall find to have been a wet Month, especially the latter part of it; there fell of Rain in that Month, 14,86 _l._ _October_ and _November_ last, although not remarkably wet, yet have been open warm Months for the most part. My Thermometer (whose freezing Point is about 84) hath been very seldom below 100 all this Winter, and especially in _November_. Thus I have laid before you as short Account as I could of the preceding Disposition of the Year, particularly as to wet and warmth, because I am of opinion that these had a great Influence in the late Storm; not only in causing a Repletion of Vapours in the Atmosphere, but also in raising such Nitro-sulphureous or other heterogeneous matter, which when mix'd together might make a sort of Explosion (like fired Gun-powder) in the Atmosphere. And from this Explosion I judge those Corruscations or Flashes in the Storm to have proceeded, which most People as well as my self observed, and which some took for Lightning. But these things I leave to better Judgments, such as that very ingenious Member of our Society, who hath undertaken the Province of the late Tempest; to whom, if you please, you may impart these Papers; Mr. _Halley_ you know I mean.