The author evaluates the effect of the radius and concentration of a drop of solution upon the surface tension, and applies the result to the evaluation of the drop of NaCl solution. He shows that the vapor pressure exerted by the concentrated solution of NaCl-nucleus whose size is 10-15g_??_10-17g is very different from that of present common, knowledge.
Comparative and critical studies on the angular-momentum-transfer method and the vorticity-transfer method in the field of circular cyclonic or anticyclonic wind system have been given.