THE SOURCE OF THE NILE. 293 



Jidda is in lat. 2S o' 1" north, and in long. 39 e 16' 45" 

 eaft of the meridian of Greenwich. Our weather there had 

 few changes. The general wind was north-weft, or more 

 northerly. This blowing along the direction of the Gulf 

 -brought a great deal of damp along with it ; and this damp 

 increafes as the feafon advances. Once in twelve or four- 

 teen days, perhaps, we had a fouth wind, which was always 

 dry. The higheft degree of the barometer at Jidda, on the 

 5 th of June, wind north, was 26° 6', and the loweft on the 

 1 8th of fame month, wind north-weft, was 25 7'. The 

 higheft degree of the thermometer was 97 on the 12th of 

 July, wind north, the loweft was 78 wind north. 



CHAP. 



