VOL. XXIII.] PHILOSOPHICAL TRANSACTIONS. 649 



to the S. W. ; though at the same time there were others perpendicular, which 

 still continued so, notwithstanding the wind. Also that such as were curved, 

 had always the convex side from the wind, and the concave towards it ; that is, 

 the wind being at N. E. the concave was towards the N. E. and the convex to- 

 wards the S. W. It rained a great deal during the continuance of these spouts; 

 and after their total disappearance, there was half an hour's violent storm from 

 the N. E. with very little rain ; but afterwards the weather cleared up. 



Explanalio7i of the Figures of these Spouts.— In pi. ]6, fig. 2, a represents 

 the spout, of a black colour, falling perpendicularly out of a black cloud ; b the 

 water of the sea, rising in the form of a pillar or column in the middle, and 

 scattered round about the said middle column like smoke, or rather like the 

 falling of a jet d'eau : these two meet each other directly, and the column of 

 water from the sea is commonly grosser than the spout from the clouds. 



In fig. 3, A is a curved spout, joining with the rising water of the sea at b. 



Fig. 4, A represents a black spout, falling obliquely from the clouds of the 

 same colour ; b the ascending column of the sea-water as in fig. 2, with this 

 difference, that here the spout and column of water did not meet. 



Fig. 5, E and w denote east and west ; 1 2 3 the successive progress of the 

 boiling of the sea from east to west, or from N. E. to S. W., and that without 

 any appearance of a spout from the clouds, pointing to either of these places. 



Fig. 6, A represents the large perpendicular spout, a little before its bursting, 

 white in the middle ; b the column of sea-water joining it ; 2 2 2 2 the water of 

 the sea ascending in the form of smoke up a chimney, all along the column at 

 B to the clouds. 



Fig. 7, A the breaking of a perpendicular spout, commonly beginning in the 

 middle at a ; b the rise of the sea water, which begins to fail, and the middle 

 column to disappear. 



Fig. 8, A an oblique spout, which after reaching to the sea in a curved line, 

 or obtuse angle, soon after breaks at a, and disappears ; b the rising of the sea- 

 water also beginning to cease. 



Fig. 9, A, a perpendicular spout beginning to fall ; b the beginning ascent 

 of the water of the sea under it. 



Fig. 10, A, an oblique spout beginning, or darting itself out of the clouds; 

 B the rising, or boiling of the water, answering to it in an oblique line ; these 

 sometimes reach down to the sea or rising water, and sometimes not so far, 

 but continue a while as here represented. 



VOL. IV. 4 O 



