Page:Travels to Discover the Source of the Nile - In the Years 1768, 1769, 1770, 1771, 1772, and 1773 volume 3.djvu/52

32 breadth to be 276 miles, equal to 92 leagues, or thereabouts.

, as the generality of maps have placed the coast of Arabia where Loheia stands, in the 44°, and it is the part of the peninsula that runs farthest to the westward, all the west coast of Arabia Felix will fall to be brought farther east about 3° 46′ 0″.

packing up our barometer at Loheia, I filled a tube with clean mercury, perfectly purged of outward air; and, on the 30th of August, upon three several trials, the mean of the remits of each trial was, at six in the morning, 26° 8′ 8″; two o'clock in the afternoon, 26° 4′ 1″; and, half past six in the evening, 26° 6′ 2″, fair, clear weather, with very little wind at west.

Mafuah, the 4th of October, I repeated the same experiment with the same mercury and tube; the means were as follow: At six in the morning 25° 8′ 1″; two o'clock in the afternoon, 25° 3′ 2″; and, at half past six in the evening, 25° 3′ 7″, clear, with a moderate wind at west, so that the barometer fell one inch and one line at Mafuah lower than it was at Loheia, though it often rose upon violent storms of wind and rain; and, even where there was no rain, it again fell instantly upon the storm ceasing, and never arrived to the height it stood last at on the coast of Arabia. The greatest height I ever observed Fahrenheit's thermometer in the shade, at Mafuah, was on the 22d of October, at two in the afternoon, 93°, wind N.E. and by N. cloudy; the lowest was on the 23d, at four in the morning, 82°, wind west. It was, to sense, much hotter than in any part of Arabia Felix; but we