  This paper makes a correction to the collision rates of small droplets in
turbulent fluid derived by Saffman and Turner(1956). Not only the distortion
but also the rotation of the fluid is taken into account between two close
droplets. A rotation reference is fixed on one drop, and the fluxes of the
other drops moving towards the fixed one are carried out based on this new
reference. The behaviors of turbulent flow are analyzed within the smallest
eddies under the rotation reference, and a correction is made to the collision
rates by multiplying a factor sqrt(2).
