LABORS OF THE JOINT COMMITTEE. 155 



more than three hundred or four hundred yards wide, but 

 at some distance from it, in a zone on the north side, along 

 with the shingles which were taken up from Brunswick, 

 extending more than twenty miles beyond Brunswick, and 

 fifteen miles north east of Amboy, where the spout disap- 

 peared at the surface of the earth. 



Does the hail or rain in spouts always fall on the north 

 side, or does it sometimes fall on both sides of the path of 

 the spout ? 



If there is any thing remarkable in your locality as to 

 mountains, please to mention it in your first journal. 



During the progress of a storm, take frequent observa- 

 tions, especially noting the time of the heaviest fall of rain, 

 hail, or snow, the maximum and minimum of the barome- 

 ter ; any change of wind in strength or direction, and so of 

 the clouds. 



124. The barometer generally stands lowest near tbe mid- 

 dle or end of storms, and not unfrequently, in the winter 

 months, suddenly rises about two days before the com- 

 mencement of a great storm. This is a highly interesting 

 point for further examination. Is this rise caused by the 

 outpouring of the air above a storm raging at that time in 

 the south west, carried especially to the north east by the 

 upper current of air? 



At the termination of our great north east winter storms, 

 which are known to move from the westward to eastward, 

 with a velocity of about twenty-five or thirty miles an 

 hour, the wind frequently changes round, sometimes one 

 way and sometimes the other, and settles in the north-west; 

 while the clouds above continue to come with increased 

 velocity from the south west. Let this point be noted ; and 

 if there is any general law on this or any other subject of 

 meteorology, already known in your locality, mention it in 

 your first journal. It is believed that during the whole 

 progress of these north east storms at Philadelphia, the up- 



