of Wind, when the Quicksilver has been low, it generally rises again very
- That the more Northerly places have greater Alterations of the Baroscope, than the more Southerly.
- That within the Tropicks and near them, those Accounts I have had from others, and my own Observation at St. Helena, make very little or no Variation of the height of the Mercury in all Weathers.
Now that Theory that can well account for all these appearances, will, in all probability, approach nearer the true cause of the Barometers Variations, than any thing hitherto afforded; and such an one I am bound to believe, is that which I here lay down with submission to better Judgments.
I conceive that the principal Cause of the rise and fall of the Mercury, is from the variable Winds, which are found in the Temperate Zones, and whose great unconstancy here in England is most notorious. I shall not at present inquire into the Cause of its uncertainty, but the Matter of Fact being most