l68 PHILOSOPHICAL TRANSACTIONS. [aNNO I667. 



Some Observations made both in Mines and at Sea. iV" 26, p. 481. 



Mr. Colepress relates, that discoursing with one John Gill, a man well expe- 

 rienced in mineral affairs, he affirmed, that if in digging deep under ground, 

 the work-men meet with water, they never want air or wind ; but if they miss 

 water, as sometimes it happens, even at 12 or l6 fathoms depth, they are 

 destitute of convenient air, either to breathe in or to make their candles burn. 

 And that when there happens to be a great quantity of a winter's standing 

 water in a deep mine, they commonly bring or drive up an adit for drawing 

 away such water; but as soon as that part of the level is made, that any of the 

 standing water begins to run off, the men must secure themselves from dan- 

 ger of being dashed in pieces against the sides of the adit ; for the inclosed air 

 or wind in the standing water breaks forth with such a terrible noise, like that 

 of a piece of ordnance, and with such violence as to carry all before it, loosen- 

 ing the very rocks, though at some distance in the work or adit. 



He observed also on several occasions, in sailing between London and Ply- 

 mouth, that in a calm, the way in which the sea began to loom or move, the 

 next day the wind was sure to blow from that point of the compass. 



Hail Stones of an unusual Size, By Br, Natii. Fairfax. N" 26, />. 481 . 



July 17, l666, about 10 in the forenoon, there fell a violent storm of hail 

 about the coast towns of SuffiDlk. The hail was small near Yarmouth ; but at 

 Seckford-Hall, one hail-stone was found by measure to be g inches about ; 

 one at Melton 8 inches about ; at Snape-bridge 1 2 inches round. A lady of 

 Friston Hall, putting one of them into a balance, found it weigh 12 s. 6d. 

 Several persons of good credit in Aldborough affirmed that some hail-stones 

 were fiill as large as turkeys' eggs. A carter had his head broken by them 

 through a stiff country felt ; in some places his head bled, in others bumps 

 arose ; the horses were so pelted that they hurried away his cart beyond all com - 

 mand. The hail-stones seemed all white, smooth without, shining within. 



Account (f a great Number of Stones found in one Bladder. By Dr. 



Fairfax. N' 26, p. 482. 



Mr. Goodrick, surgeon at Bury St. Edmunds, affirmed to me, that himself 

 cutting a lad of the stone (for which he has a great name) took out thence at 

 one time q6 small stones, all of them of unlike shape, size, corners, sides ; 



