102 PHILOSOPHY OF STORMS. 



not very thick. It was calm on the afternoon of the 27th 

 after it cleared up. The wind, however, changed to north 

 west by the north. By order of the Joint Committee, &c. 



Third Report of the Joint Committee on Meteorology of 

 the American Philosophical Society, and the Franklin 

 Institute of the State of Pennsylvania, for the Promotion 

 of the Mechanic Arts. 



111. In our two previous reports we gave an account of 

 nine storms, in all of which the wind blew towards the 

 storm in its borders. 



Two very remarkable storms have occurred since ; one 

 commenced on the 23d of May, and continued to the 7th of 

 June; the other occurred on the night of the 19th and the 

 day of the 20th of June. Immediately after the termina- 

 tion of these storms, the committee addressed circulars to a 

 great many individuals throughout the United States, re- 

 questing an account of them, particularly with regard to 

 the rain, and the strength and direction of the wind. Our 

 inquiries were not in vain. We received very satisfactory 

 replies from many in the region of the storms, and beyond 

 their boundaries. It would be highly desirable to give the 

 documents to the public, entire, but our present means will 

 not permit. 



It is hoped that when government shall become acquaint- 

 ed with the important discoveries already made, and the 

 absolute necessity of combined and simultaneous exertions, 

 beyond the reach of individuals, their liberality will be 

 cheerfully extended to the promotion of this science, in our 

 widely extended country. 



In the mean time, we must content ourselves by giving a 

 few general results, as we did in our previous reports. 



In the first place, we remark a very striking difference 

 between the first of the two storms mentioned above, and 



