Rotary Action of the Providence Tornado. 275 
ward, perhaps, as would be in line with m, or f J, in these two 
figures. 
Fig. V. 
Lept _borden—tp tra ek. 
ene See 
From this examination it appears to result, that an observer 
who follows the track of a tornado after its departure, will find 
on one side of the apparent axis of its path, if it be a whirlwind, 
a continued series of prostrations pointing almost invariably on- 
ward and inward, with various degrees of inclination to the 
course of the path. While on the other side of the axis, a nar- 
rower band or belt of prostrations will be found, which are also 
inclined mainly inward and onward, but showing greater incli- 
nations from the line of progress, together with frequent cases 
which incline more or less backward and sometimes even out- 
ward from the course of the tornado. ip gaeage 
It may also appear, that a want of proper attention to the ne- 
cessary conditions of the prostrating power ina progressive whirl- 
wind, can alone induce us to ascribe such effects to supposed an- 
tagonistic winds, blowing simultaneously in opposing directions. 
Leaving, for a moment, the more tangible features of this in- 
quiry, we may now take some notice of the more outward por- 
tions of the “cone” or whirlwind, which are supposed not to be 
comprised in figure IV. Assuming here the involuted and in- 
ward motion, with its upward discharge at the centre, it follows 
that the impulsive accession of air which is 
