VOL. XXXVIII.J PHILOSOPHICAL TRANSACTIONS. 6j5 



Mr. Lewis had seen on leaves, he observed none like these. When the leaf is 

 small, they are scarcely discernible : they grow with the leaf, which is not dis- 

 coloured or crumpled by them. Redi, in his curious treatise on the Genera- 

 tion of Insects, gives no account of any such nests. 



On Tuesday the 5th of Sept. 1732, about 1 1 in the morning, an earthquake 

 was felt in divers places in Maryland. One Mr. Chew had his house shook by 

 it for some time, and the pendulum of his clock stopped. During its continu- 

 ance, a rumbling noise was heard in the air, and many people who did not feel 

 the shaking, as well as those who did, complained of a dizziness in their heads, 

 and sickness at their stomach. At the same time it was felt in Pennsylvania, 

 and New England. 



Mr. Lewis had the following account from Capt. Smith, of a surprising phe- 

 nomenon that happened in I7'25, something of the nature of the earthquake, 

 but with some remarkable difference. Oct. 22, 1725, about 2 in the afternoon, 

 the sky being very serene and clear, Capt. Smith heard, as he then thought, 

 the noise of a gun, of a minion size, about 12 miles eastward from him, which 

 noise was repeated at least 20 times, but at unequal intervals; and was soon 

 after followed by a very loud explosion, as if a ship had been blown up. On 

 inquiry, he was told by several persons, who lived about 12 miles distant from 

 his house, that they were greatly amazed with the appearance of an extraordi- 

 nary brightness in the zenith, resembling flame, which continued for about 5 

 minutes; after which the imaginary guns were fired 20 or 30 times, which so 

 disturbed the atmosphere, that the birds lost the use of their wings, and fell 

 to the ground in great disorder. This noise was heard about 50 miles each 

 way, from the bright appearance aforesaid. — Thus far the Captain, 



Mr. Lewis heard the noise, as most people did, but saw not the brightness 

 at Patapsko, being about 6o miles from the Captain's house. He was told that 

 the shock, occasioned by the noise, threw down pewter that was set to dry 

 against the side of a house.* 



Concerning some Children inoculated with the Small-pox, at Haverfordwest in 

 Pembrokeshire. N° 42^, p. 121. 



The method of inoculating for the small-pox was first introduced at Haver- 

 fordwest, about the year 1722, by the ingenious and learned Dr. Perrott 

 Williams, who then lived in this town, and had practised physic for several 

 years in this country with eminent success; but is since removed to London. 

 He had then his own children inoculated among some of the first on whom the 



• This phenomenon has much the appearance of a large fire-ball or meteor, and its explosions. 



