SEVENTH ANNUAL MEETING 



91 



previously described. The high wind velocities in the south- 

 west are probably due to the coincidence in direction of the pre- 

 vailing 1 westerlies with the westerly cyclonic winds of these 

 tracts. Secondly, the wind velocities increase radially inward 

 to a maximum and drop to a common minimum at the center. 

 This is illustrated more clearly in figure 14, in which the wind 

 velocities are plotted as ordinates. The abscissa is a diameter 

 of the hypothetical low and the ordinates have been erected at 



LEGEND 



■416-400 



UoO-350 

 &50-275 

 ES3275-200 

 CZ3 200-144, 



Figure 16. Vapour Pressure 



points corresponding to the centers of the tracts along the 

 diameter. A scale of wind velocities in miles per hour is marked 

 off upon the central ordinate. The broken lines indicate the 

 respective radial variations in wind velocity. It is seen that 

 the velocity increases radially to a maximum at the innermost 

 concentric area and then falls to a minimum of 8 miles per hour 

 at the center. These facts are in agreement with the general 

 knowledge of the nature of cyclones. 



