THE 



PHILOSOPHICAL TRANSACTIONS 



OF THE 



ROYAL SOCIETY OF LONDON; 



ABRIDGED. 



XCFI. Of an Unusual Agitation of the Sea, at Ildfracombey in Devonshire^ 

 Feb. 27, 1756. By the Rev. Mr. Prince of Barnstable, p. 642. 

 On Friday, Feb. 27, ^7^^, at 6 in the evening, the weather being then ex- 

 tremely fair, as it had been for some time before, and continued for some days 

 afterwards, the sea being exceedingly calm, a rumbling noise was heard like that 

 which usually precedes what the sailors call a ground sea, only it was much 

 louder. The tide, at that time, was above half ebbed, and retired as far as the 

 head of the key, leaving the vessels within the pier on dry ground ; when on a 

 sudden the sea came on with a great run, filling the quay to the height of 6 feet 

 perpendicular ; and the water remained at the same height near half an hour, 

 but was all the time agitated as in a storm. The like phenomenon also hap- 

 pened Nov. 1st, last year, and the waters then rose to the same perpendicular 

 height. 



XCVIL Extract of a Letter from the Rev. Mr. Holdsworth, at Dartmouth, 

 relating to the Agitation of the fVaters observed there Nov. I, 1755. p. 643. 

 There was a surprizing agitation in the waters about 9 in the morning of 

 Nov. 1, 1755, when there was a great and sudden swell, though there was but 

 little wind. During this fermentation, though it was 4 hours ebb, the waters 

 rose as high, or higher than they usually do on the highest spring tide. This 

 violent motion lasted about 4- of an hour, and then the waters fell to their usual 

 height at that time of the tide. 



XCJ^III. A Method of Observing the Wonderful Coiifigurations of the Smallest 

 Shining Particles of Snow, with several Figures of them. By John Nettis, 

 M. D., Middleburg, &c. Translated from the Latin, p. 644. 

 • The weather being intensely cold in the year 1740, the snow which fell was 



VOL. XI. B 



