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Mr. Smeaton has communicated an excellent table of the 

 velocity of wind, which I here tranfcribe from the Phil. Tranf. 

 1759. P- 165. 



Feet per I Perpendicular Force on one fquare Foot, in Avoirdup. Pounds and Parts. 



,005 -J Hardly perceptible. 

 ,020 S. Juft perceptible. 

 ,044 3 



Gently pleafant. 

 Pleafant, briflc 



•.079 1 



•.123 J 



-.49* ■) 



i»ro7 i 



,968 T 



.075 3 



4,429 -) 



> High w!i 



6,027 J 



1,968 

 3.075 



Very briflc 



7.873 



nd. 



Very high wind. 



9.963 



12,300 Storm or tempeft. 



17,715 Great ftorm. 



31,490 Hurricane. 



49,200 Hurricane that tears up trees and carries buildings before it. 



And 



