Rotary Action of the Providence Tornado. 269 



the rights as relates to the center of the tornado. But this build- 

 ing having received its motion by yielding to the wind, shows 

 the true course of the latter as whirling to the left. 



Passing by the prostration of the range of buildings near the 

 river, described by Mr. Allen, I proceed to notice the effects which 

 appeared on crossing to the Massachusetts side. 



From the bank of the river to the house of Abraham Tifts on 

 the Lyon farm, three fourths of a mile, the grounds were open 

 and unbroken, being mostly under cultivation and with few trees 

 exposed to the tornado, excepting an orchard of scattered apple 

 trees westward of Tifts' house. The traces of the wind in and 

 adjacent to this orchard were very distinct in their character, and 

 I subjoin here the sketch on which they are represented. 



Fig. III. Providence Tornado. 

 North or left side. 



'23 



^ 3, \2£\'\ 



1 • o ' .-' ~-. 



10 . 



9 



'^ ^ \ ^'^^ K 



\ 



,36 



39 





AO 



Course of '^\axzs^ East. 



J 



33- 



Soutii or right side. 



Explanations of Fig. III. — The cases of prostration 4 to 14, were from a line 

 of small locust trees on the west border of an old apple orchard, and are severally 

 shifted a little out of line for the sake of a distinct exhibition of their directions. 



From thence to near Tifts' house at h, the ground is but slightly foreshortened, 

 and the relative positions of each tree, on the left of the centre, is approximately 



