Table 42. 

 RADIUS OF CRITICAL CURVATURE AND VELOCITIES OF GRADIENT 

 WINDS FOR FRICTIONLESS MOTION IN HIGHS AND LOWS. 



English Measures. 



R c = radius of critical curvature in miles. V c High = maximum speed in miles per hour on 

 isobar of critical curvature. V s = speed along straight line isobars = 0.5 Vc. FLow = speed in 

 Low along isobar of curvature R c . V Low = 0.4142 Vc- 



The table is computed for a density of the air, p = .0010, which represents the conditions 

 in the free air at an elevation of, roughly, one mile. Values for any other density can be readily 

 found by dividing each or any of the tabulated values by the ratio of the densities, as, for ex- 

 ample, for surface conditions divide by 1.2 = - and so on. 



.0012 



Smithsonian Tables. 



77 



