Summary

Philosophical Transactions, Volume 4…

“ The Wind is variable also, but if you be within 100 leagues of the European Continent, it is generally inclined to North-East
From 34 degrees, if you be inclining to the coast of Africa, or about the Meridian of the Canaries, the Wind is so certain, and constantly at North-East (or within two points) that it is rare to find it otherwise. Yet in Winter, upon the coast of Africa there are sometimes Westerly storms, that are violent, but of no long continuance. And in Summer, when it is sometimes calme, the Air will come variably. These North-East-Winds hold most commonly to 8.
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Source: Wikisource

Philosophical Transactions, Volume 4…

“ If it be a good firme stone, it will not draw (as they speak) water above half an inch above the level of the water, and that perhaps but at the edges only, the parts of which might be somewhat loosen'd in the hewing. But a bad stone will draw water up to the very top, be the stone as long as it will, all over.
As for the Charges of Covering Houses with Slate, they may be thus computed.
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Source: Wikisource

Philosophical Transactions, Volume 4…

“ These Stones may be pretty well guessed at, whether they be of a close or loose texture, by their Colour: For the overblackish Blew is aptest to take in water; but the lighter blew is alwayes the firmest and closest. To which may be added the Touch; for, a good stone feels somewhat hard and rough; whereas an open stone feels very smooth, and as twere, oily. ”
Source: Wikisource

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