New Brunswick Toimado. 71 



indicated by the force with which various objects, often of much 

 weight, are carried spirally upward about the axis of the revolv- 

 ing body. 



Now the effects of this inward vorticular motion at the surface 

 of the ground, are clearly manifested in the cases before us ; and 

 are also well illustrated by Prof. Bache, in his paper on this tor- 

 nado, although referred by him to a different action,* 



2. As the effects which may be observed at various points in 

 the track were produced at different moments of time, and by 

 forces acting in different directions, as well as of various intensi- 

 ties, we may expect to find great diversities in the several direc- 

 tions of the fallen trees and other prostrated bodies ; and further, 

 as all the forces, in addition to their inward tendency, have like- 

 wise a common tendency in the direction pursued by the tornado, 

 we may expect to find, also, full evidence of this progressive force 

 in the direction of the fallen bodies. 



These effects, I need hardly state, are distinctly observed in 

 the case before us ; and appear likewise from the observations of 

 Prof. Bache. The results already noticed have been observed 

 also in the tracks of other tornadoes : so that a general inclina- 

 tion, both inward and onward, amid the various and confused di- 

 rections of the fallen bodies, is distinctly recognized by all parties 

 to this inquiry. 



3. It has been often noticed, that where two fallen trees are 

 found lying across each other, the uppermost or last fallen points 

 most nearly to the course pursued by the tornado. 



In view of the facts above stated, much pains have been ta- 

 ken to establish, by induction, a central and non-whirling course 

 in the wind of the tornado ; first inward and then upward, like 

 that resulting from a common fire in the open air. I do not pro- 

 pose to notice the insuperable difficulties which appear to attend 

 this hypothesis. It is important to state, however, that all the 

 above mentioned effects, when theoretically considered, are, at 

 least, equally consistent with the involute whirling action of an 

 advancing vortex. This important consideration I have not seen 

 recognized by the advocates of the non-whirling theory ; and it 

 seems proper, therefore, to point out, as we proceed, other and 

 more distinguishing effects of the whirling action. 



* Transactions of American PhilosopLical Society, vol. v, N. S. 



