C.K. Stidd (“Cube-root-normal precipitation distributions”, Transactions of the American Geophysical Union, 1953, vol. 34–1, pp. 31–35) has shown that in a great number of cases the cube root of precipitation-data can be considered as being normally distributed. This has been tested for different lengths of periods and for diverse types of climate. Although a cube-root normal distribution seems to fit most of the data, Stidd admits that in some cases some other root could lead to a better fit.