LABORS OF THE JOINT COMMITTEE. 101 



I 



the lower, and whether there was much or little rain. We 

 beg you not to be deterred from answering this communica- 

 tion, even if you should be enabled to answer only one of the 

 questions, particularly the direction of the wind. As many 

 to whom we shall send this " circular " may not be able to an- 

 swer these questions as fully as might be wished, we par- 

 ticularly request that an answer may be sent to similar 

 questions as to the great equinoctial storm which takes place 

 generally near the 20th of September ; or, to ensure success, 

 please to extend your observations to the middle of October. 

 If all to whom this circular is sent shall do as requested, we 

 are sure the result will be highly important to Meteorology. 

 The north east storm, which is the immediate object of this 

 circular, commenced at Philadelphia on the 20th of June. 

 It was very warm and nearly calm early in the morning, 

 wind south west, middle clouds southeast, and upper clouds 

 west, having been preceded by a very heavy shower from 

 the W. S. W. on the afternoon before, and also a hard rain 

 with much thunder in the evening from the south. During 

 the morning of the 20th the wind changed round from east 

 to E. N. E. and blew hard; it commenced raining at five 

 o'clock, with a strong wind from E. N. E. and continued 

 quite hard all night. The wind moderated next day, but 

 continued about E. N. E., moderate, till about six, P. M., of 

 the 27th, when it changed round to N. N. E. and cleared 

 suddenly. The rain ceased at six, A. M., of the same day, 

 having rained hard for sometime in the night of the 25th, 

 till the morning of the 27th ; the wind was very gentle on 

 the 26th, when it rained hard all the afternoon. 



There was but little rain from the morning of the 21st 

 till the night of the 25th, except on the 23d from three till 

 six, P. M . 



On the 22d, 23d, 24th, 25th and 27th, the lower clouds 

 broke away two or three times, and through the breaks the 

 upper clouds were seen coming slowly from the south west, 



