THEORY DEDUCED FROM PHYSICAL LAWS. 15 



wind was towards Philadelphia, with moderate rain. The 

 same at Middletown, Connecticut ; Providence, Rhode 

 Island ; and Portsmouth, New Hampshire. In Berks coun- 

 ty, the rain was most violent, as mentioned by the news- 

 papers ; direction of the wind not given. 



This case corresponds exactly with the deductions of 

 theory in article 24. This storm moved on to the north 

 east, and the barometer stood lowest at Providence exactly 

 six hours after it was lowest at Philadelphia. In the mean 

 time, the wind had chopped round to north west at Phila- 

 delphia, with much rain. 



32. On the 19th of June, 1835, about five, P. M., there 

 took place in New Jersey a most violent land-spout. It 

 appeared to all persons, in whatever direction it was viewed, 

 in the shape of an inverted cone of cloud, reaching from a 

 dark cloud above, down to the earth. It commenced about 

 seven miles west of New Brunswick, and terminated at Perth 

 Amboy, about seventeen miles from where it began, having 

 travelled a little north of east, with a very moderate velocity, 

 not exactly ascertained, probably not more than twenty-five 

 or thirty miles an hour. It prostrated every thing in its 

 path, which was from two hundred to four hundred yards 

 wide ; the trees on the north side being almost all thrown 

 with their tops towards the south east, and those on the 

 south side with their tops to the north east, and none with 

 their tops outwards, as appears by a chart exhibited to the 

 Am. Phil. Soc., by Prof. Bache. It unroofed the houses and 

 prostrated their walls, many of them outwards, as if by 

 explosion, and some light ones it lifted up nearly perpendic- 

 ularly to a considerable height, and tearing up the floors of 

 some whose walls remained standing. It carried the joists 

 and upper floors and rafters, in some instances, to a consid- 

 erable height, and threw them down on the north side of its 

 path four hundred yards from the house, almost at right an- 

 gles to its course, and exactly opposite to the course which the 



