VOL, LII.] PHILOSOPHICAL TRANSACTIONS. . 535 



nomenon was seen by the Kev. Dr. Neve, Fellow of Corpus-Christi College, at 

 Middleton-Stoney, 12 miles from hence, and at Sandford, n. w. of that village, a 

 few miles farther from this place, at the very time that Mr. S. observed it, and 

 attended by circumstances nearly the same with those that occurred to him ; it 

 must have been of a pretty considerable height. Mr. S. adds, that a most terrible 

 storm of rain and hail followed it, which continued from a little past 3 to near 5 

 o'clock the next morning ; and that they had much of such stormy weather there, 

 and in the neighbourhood of that city long after. 



XIX. On some Productions of Nature in Scotland resembling the Giant' s-cause- 

 way in Ireland. By Emanuel Mendez Dacosta, F.R.S. p. 103. 



Mr. Murdoch Mackenzie, who, by order of the Lords of the Admiralty, sur- 

 veyed the coasts of Scotland, communicated to Mr. D. the following. In Cana 

 island, which is 4 English miles long, to the southward of Skye, and near the 

 island of Rum, the rocks, about a quarter of a mile above the harbour, rise into 

 polygon pillars southward. About 2 miles from the west end of Cana, is a low 

 rock, or small island, where is a very regular pavement of hexagon stones, each 

 about a foot deep, and about g inches over. They form a smooth uniform pave- 

 ment ; and the sides of all the stones lie extremely contiguous, or close. Imme- 

 diately below this upper pavement, lies another exactly like it. The pillars are 

 jointed exactly like those of the Giant's-causeway, and are laid with their con- 

 cavities downward, and their convexities upward ; and their hollows are as much 

 in proportion to these pillars, which are smaller, as they are in those of the 

 Giant's-causeway. These places are about 200 miles northward distant from the 

 Giant's-causeway. 



XX, Elements of New Tables of the Motions of Jupiter s Satellites. By Mr. 

 Richard Danthorne. Dated Cambridge, March 3, 1761. p. 105. 



The public employment*, wherein I am at present, and for several years past 

 have been engaged, not permitting me to make new tables of the motions of 

 Jupiter's satellites, according to the last corrections I liad (from a comparison of 

 more than 800 observations) made in the places and orbits of those planets, I am 

 at last persuaded to communicate to the Royal Society, the elements of those 

 tables, hoping they will prove no unacceptable present to astronomers. 



The tables are designed on the plan of those of Mr. Pound for the first satel- 

 lite, published in the Philos. Trans. N°36l ; except that I have not deducted the 

 greatest equations from the epochs, as is done by Mr Pound. The epochs of the 

 conjunctions of the several satellites with Jupiter, fitted to the Julian year (before 



* That of Surveyor to the Corporation of the great level of the fens. — Orig. 



