VOL. XXXII.] PHILOSOPHICAL TRANSACTIONS. 585 



sliattered many houses in the town of Angra, and places adjacent. Prodigious 

 quantities of pumice stones and half-broiled fish were found floating on the 

 sea, for many leagues round the island, and abundance of sea-birds hovering 

 about it. 



An acquaintance of mine informed me, that in his passage from Cadiz to 

 London, the latter end of April 1721, he observed the sea from Cape Finistere, 

 almost to the chops of the channel, to be covered with pumice-stones, some of 

 which he gave me. 



Concerning the Effects of a violent Shower of Rain iu Yorkshire. By Mr. 

 Ralph Thoreshy, F.R.S. N" 3/2, p. 101. 



The effects of a violent shower of rain at Ripponden, near Halifax, were so 

 surprising, that I wrote to a gentleman in those parts for an account that might 

 be depended on ; and particularly desired to know, whether there was not an 

 eruption of waters out of the hills, as the late Mr. Townley wrote me there 

 was out of Pendle-hill, in that at Star-bottom mentioned in the Philos. Trans. 

 N° 245 : but all the account I can learn of this is, that what they call the 

 dashing of two great watery clouds on the hills, occasioned the inundation ; 

 whatever was the more immediate cause, the effects were dismal, and so sudden, 

 that though it was in the day-time, the poor people could not save their lives. 

 This calamity happened May 18, 1722, between the hours of 3 and 5, when the 

 beck was raised more than 2 yards in perpendicular height, above what was ever 

 known before. Several houses, 4 mills, some say 6, Q stone- bridges, and 10 

 or II of wood, are broken down, and the wheels, dams, and sluices, of most 

 of the mills that are left standing, broken and damaged ; and a great deal of 

 cloth gone. Fifteen persons were drowned. 



The rapidity of the torrent was so violent, that it broke down the north-side 

 of Ripponden chapel, and carried off most of the seats. It tore up the dead 

 out of their graves. It swept away all the corn-land, as deep as the plough had 

 gone. Some persons saved themselves by forcing a way out of the roofs of 

 their houses, and sitting upon the ridges till the floods abated. 



Concerning a new Experiment made with the Blood of a Person dead of the 

 Plague. By Mons. Couzier. Communicated by Dr. fVoodward, F. R. S. 

 N° 372, p. 103. 



On the 1st of April I took a quantity of blood from the body of a person 

 dead of the plague, and mixed it with warm water, then I attempted to inject 

 VOL. VI. 4 F 



