% i TRAVELS TO DISCOVER 



breadth to be 276 miles, equal to 92 leagues, or there- 

 abouts. 



Again, as the generality of maps have placed the coaft of 

 Arabia where Loheia Hands, in the 44 , and it is the part of 

 the peninfula that rims fartheft to the weftward, all the 

 weft coaft of Arabia Felix will fall to be brought farther 

 eaft about 3° 46' o". 



Before packing up our barometer at Loheia, I filled a 

 tube with clean mercury, perfectly purged of outward air; 

 and, on the 30th of Auguft, upon three feveral trials, the 

 mean of the remits of each trial was, at fix in the morning, 

 26° 8' 8"; two o'clock in the afternoon, 26 4' \"\ and, half 

 part fix in the evening, 26 6' 2", fair, clear weather, with very 

 little wind at weft. 



At Mafuah, the 4th of October, I repeated the fame ex- 

 periment with the fame mercury and tube ; the means 

 were as follow : At fix in the morning 25 8' 1" ; two o'clock 

 in the afternoon, 25 3' 2" ; and, at half paft fix in the evening, 

 25° 3' 7", clear, with a moderate wind at weft, fo that the ba- 

 rometer fell one inch and one line at Mafuah lower than it 

 was at Loheia, though it often rofe upon violent ftorms of 

 wind and rain ; and, even where there was no rain, it again 

 fell inftantly upon the ftorm ceafing, and never arrived to the 

 height it flood laft at on the coaft of Arabia. The greateft 

 height I ever obferved Fahrenheit's thermometer in the 

 fhadc, at Mafuah, was on the 2 2d of October, at two in the 

 afternoon, 93 , wind N. E. and by N. cloudy; the loweft was 

 on the 23d, at four in the morning, 82 , wind weft. It was, 

 to fenfe, much hotter than in any part of Arabia Felix ; but 



1 we 



