3844 W. Ferrel—Relation between the Barometvcs Gradient 
The following equation then expresses very nearly the rela- 
tion in all cases between the barometric gradient and the velo- 
city of the wind: 
(1 q_ (2nsin/+u)v sect P_ (0524sin/+u)vseci P 
A soe 8300000 ue Je 8300000 Ee es 
in which 
(2) 
» COs Zt 
th ee 
Y 
waterspouts, all of which are cyclones contained within the 
larger cyclones and controled by their motions. It is likewise 
applicable to the resultant of any number of cyclones contained 
to 90° at the equator, where sin/=0, since there can be 00 
gyrations there, and the motions must be either toward or from 
_acenter of rarefaction or condensation. 
