488 



CATALOGUE. — METEOROLOGY, AURORA BOEEALIS. 



size of a cherry ; the sea was agitated round iti base through 

 a space of about 130 feet in diameter : the relator rather 

 supposes that the water was ascending than descending. 



Cavallo. III. 306. 



Thinks electricity rather a consequence than a cause of 

 waterspouts. They sometimes vanish and reappear. 



Murhard on some waterspouts. Gilb. XII. 

 239. 



Destiiption of a JValerspout. In a letter Jrom William 

 UiCKETTS, Esij. Captain in the R»yal Navy, to the 

 Right Hon. Sir Joseph Banks, Bart. K.B. P. R. S. 

 Read to the Royal Society sth May, 1803. From the 

 Journals of the Royal Institution. II. 75. 

 In the month of July 1800, Capuin Rickctts was sud- 

 denly called on deck, on account of the ra^jid approach of a 

 waterspout, among the Lipari Islands : it had the appear- 

 ance of a viscid fluid, tapering in its descent, proceeding 

 from the cloud to join the sea : it moved at the rate of 

 about two miles an hour, with a loud sound of rain : it 

 passed the stern of the ship, and wetted the after part of the 

 mainsail : hence Captain Ricketts concluded that water- 

 spouts were not continuous columns of water : and subse- 

 quent observations confirmed the opiirion. 



In November 1801, about twenty miles from Trieste, a 

 waterspout was seen eight miles to the southward ; round 

 its lower extremity was a mist, about twelve feet high, 

 nearly of the form of an Ionian capital, with very large vo- 

 lutes, the spout resting obliquely on its crown. At some 

 distance from this spout, the sea began to be agitated, and a 

 mist rose to the height of about four feet : then a projection 

 descended from the black cloud which was impending, and 

 met the ascending mist about twenty feet above the sea ; 

 the last ten yards of the distance were described with a very 

 great rapidity. A cloud of a light colour appeared to ascend 

 in this spout like quicksilver in a glass tube. The first spout 

 then snapped at about one third of its height, the inferior 

 part subsiding gradually, and the superior curling upwards. 



Several other projections fiom the cloud appeared, with 

 corresponding agitations of the water below, but not always 

 in spots vertically under them : seven spouts in all were 

 formed ; two other projections were reabsorbed. Some of 

 the spouts were not only oblique but curved : the ascending 

 cloud moved most rapidly in those which were vertical; they 

 lasted from three to five minutss, and their dissipation was 

 attended by no fall of rain. For some days before, the wea- 

 ther had been very rainy with a south easterly wind ; but 

 no rain had fallen on the day of observation. 



Aurora Borealis. 



Account of authors, Weigels Chemie. I. 



324. 

 M. Berl. 1710. I. 131. 



Seen in 1707. 



Halley. Ph. tr. 1716. XXIX. 40G, 



The first that he had seen. 

 Halley. Ph. tr. 1719. XXX. 1099. 

 Barrell. Ph. tr. 1717. XXX. 384. 

 Folkes. Ph tr. 1717. XXX. 586. 

 Ph. tr. 1719- XXX. IIOI. In Deyonshire. 



1719. XXX. 1104. At Dublin. 

 Hearne. Ph. tr. 1719- XXX. 1107. 

 Percival. Ph. tr. 1720. XXXI. 21. 

 At DubUn. Ph.tr. 1721. XXXI. 180. 

 In Devonshire. Ph. tr. 1721. XXXI. 186. 

 Linnae regis. Ph. tr. 1723. XXXII. 300. 

 Binman. Ph. tr. 1724. XXXIII. 175. 

 Langwith, Huxhani, Hallet, Halley, and 



Calandrini. Ph. tr. 1726. XXXIV. 132.. 



150. 

 Langwith. Ph. tr. 1727- XXXV. SOI. 



With a good figure. 



Dobbs. Ph. tr. 1726. XXXIV. 128. 

 Huxham. Ph. tr. 1750. XLVI. 472. 

 Meyer. C. Petr. I. 351. 

 Derham. Ph.tr. 1727. XXXIV. 245. 1729. 



XXXVI. 137. 

 At Lynn. Ph. tr. 1727. XXXV. 253. 

 llestrich. Ph. tr. 1727. XXXV. 255. 

 Ph.tr. 1728. XXXV. 453. 

 Maier. C. Petr. IV. 121. 

 Cramer. Ph. tr. 1730. XXXVI. 279. 

 Hoxton on an agitation of the needle. Ph 



tr. 1731. XXXVII. 53. 



It lasted an hour. 



Greenwood and Lewis. Ph. tr. 1731. 



XXXVII. 55. 

 Mairan Trait^ de 1' aurora boreale. 4. Par 



