500 PHILOSOPHY OF STORMS. 



and direction of the winds, and also of the clouds, and send 

 the accounts, (published in some paper,) as early in Octo- 

 ber as convenient, to William Hamilton, Esq., Actuary of 

 the Franklin Institute, Philadelphia. 



Finally, if any gentleman intends to clear from twenty to 

 fifty acres of woodland this spring, or early in the summer, 

 in the western or north western parts of Pennsylvania, will 

 he please to inform me of the fact as soon as convenient. 



Journals of the weather also for the 16th, 17th, and 18th 

 of March, 1838, kept in various parts of Virginia and North 

 Carolina, are much desired ; and if gentlemen can even tell 

 me how the trees are thrown down, indicating the direction of 

 the wind, the information will be highly valuable, and should 

 not be withheld, if nothing else is known or recollected. 1 

 I am, gentlemen, yours respectfully, 



JAMES P. Espy. 



Philadelphia, April 2d, 1839. 



Documents referred to in Article 204. 



[Sir William Hamilton on the eruption of 29th September, 1538, which formed 

 Nuevo Monte, p. 127.] 



205. First then, (says Marco Antonio delle Falconi,) will 

 I relate simply and exactly the operations of nature, of 

 which I was either myself an eye witness, or as they were 

 related to me by those who had been witnesses of them. It 

 is now two years that there have been frequent earthquakes 

 at Pozzuolo, at Naples, and the neighboring parts ; on the 

 day and in the night before the appearance of this eruption, 

 above twenty shocks, great and small, were felt at the above 

 mentioned places. The eruption made its appearance the 

 29th of September, 1538, the feast of St. Michael the angel. 

 It was on a Sunday, about an hour in the night; and, as I 

 have been informed, they began to see on that spot, between 

 the hot baths or sweating rooms, and Trepergule, flames of 



1 This information would still be valuable : and so of any additional facts 

 concerning any storm investigated in this volume. 



