Life times of water drops before breaking suspended freely in a vertical air stream have been empirically determined as a function of drop diameter. It has been found that breaking probability of a drop increases with increasing drop diameter. Average life times are 273 sec at 5.5mm, 63.4 sec at 6.5mm and 10.1 sec at 7.5mm. An empirical formula obtained (average life τ sec at D cm in diameter) is τ=3.40x106e-17.0D. The number of droplets produced by breaking of a drop increases with diameter of the drop. Empirical formula is obtained for the size distribution of the droplets.
No marked difference is found between the results of the experiment at a room temperature and those at 0°C.