VOL. LXn.] PHILOSOPHICAL TRANSACTIONSiHI 287 



By Jupiter's satellites . j't^.M pd7. 39° 26' 45'' e 



By ([ and © 40 1 7 e 



Difference 34 22 1 



JT/. Remarks and Observations made on Board the Ship Kelsall, on a Voyage to 

 Jtidda and Mocha, in 1769. By the Same. p. 79- 



In the run from Socatra to Cape Aden, Capt. N. made the dist. 8° 20' w. and 

 from Cochin 29° 39' w. The latitude of the above cape he made 12°45'n. for 

 the south point of it. This cape, or headland, is one of the most remarkable he 

 ever saw, when coming from the eastward ; it is so very high and rugged, that 

 it may be seen, 15 leagues at least in fine weather. The tops of those ragged 

 rocks resemble so many chimneys and spires; and, on approaching the cape, you 

 see a zigzag wall, or whitish pathway, cut through the rocks, not at a very 

 great distance from the waterside; a little below this, at the s. e. end, is seen 

 something that looks very like two mosques ; but this cannot be seen at a greater 

 distance than 4 or 5 leagues; but when it is, you may be certain it is Cape Aden, 

 and may then steer your course for Babelmandel accordingly. 



A little to the westward of this cape, there is another high craggy headland 

 equally high and craggy as that of Aden, between which two there is an opening, 

 much resembling a small narrow strait, but in reality it is only a deep bay, the 

 bottom of which is very low land, so low, that it cannot be seen from the mast- 

 head, except you are close in shore: by this deception, people have mistaken it 

 for the strait of Babelmandel, and have been so far embayed, before they per- 

 ceived their mistake, that it was with the greatest difficulty they got out again. 



On each side of this bay lies a large rock, just at the entrance, and at about a 

 quarter of a mile from the shore: when these are seen, you may be sure it is not 

 the strait of Babelmandel. Was a ship to fall in with this place, and had not had 

 an observation for some days before, it would be very easy to mistake one for 

 the other; there is only this difference, that Cape Aden is high and ragged, and 

 Babelmandel is rather low and smooth, and the island, as the Directory observes, 

 makes like a gunner's coin. The best course to steer from Cape Aden to Saint 

 Anthony is w. by s. by the compass, and that will carry you clear of the shoal 

 lying off that point. •: 



From Mocha towards Judda, the islands of Jebbel-Zeker Aloric are pretty 

 large, and may be seen in clear weather 7 or 8 leagues; they are 6 in number, 

 the southernmost lies in the latitude of 1 3° 45' N. and bears from Mocha n.w. 

 by w. nearly, distance about 40 miles. A little to the northward of those islands 

 lies Jebbel-Zeker, a very high large island, that may be seen in fair weather 12 

 or 13 leagues. Very near this island, on the n. e. side, lie 3 small ones, not 



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