85 



also pass in a north easterly course through Swan's cross- 

 ing over Wenham Lake, to Brown's hill and that part of 

 Essex where the cyclone was last seen. 



2d. The time of the occurrence of the cyclones was the 

 same, allowing for the time it would take in its travelling 

 between the two termini, at the rate of seven miles an 

 hour, as it was estimated to have travelled, beginning at 

 four and one half o'clock P. M. and finishing at a little 

 past five o'clock of the same day. 



3d. The width of the track r- or in other words, the di-% 

 ameter of the cyclone was the same in both cases from 

 one hundred and fifty to one hundred and sixty feet ; 

 wherever there was any means of measuring the track, 

 it varied but little from this width. 



4th. As cyclones are of so rare occurrence in New Eng- 

 land, it is more probable that this occurring not only 

 on the same day but at nearly the same hour, moving 

 in the same direction at the same rate of speed and 

 of the same width, should be one and the same rather 

 than that .there should be two cyclones, separate and 

 distinct in their origin and yet each combining all these 

 elements. 



But it may be said that if this be so, why was not its 

 pathway across the country as distinctly marked as'it was 

 at both ends ? To this it may be replied that the face of 

 the cyclone may have been more or less intensified by cir- 

 cumstances or causes unknown to us, or the tunnel- 

 shaped volume of vapor or other matter of which it was 

 composed, may have been so drawn up at intervals as to 

 do no damage. But it would be presumptuous for him to 

 attempt a satisfactory solution of the question proposed, 

 when the books that treat of the subject of cyclones, tor- 

 nadoes, whirlwinds and other similar phenomena, leave 

 the reader quite in the dark upon many points of enquiry. 



