The meteorite catalogue of Prior and Hey was used to determine during the last 5 X 10 years. It is estimated that the asteroids the rate of fall and mass distribution of meteorites. An analysis consist of 16.7% by weight of nickel-iron, indicating a pri- for the United States and Europe shows that 3.3 meteorites with mary object that before breakup was intermediate in size a mass 10 kg reach the earth per day. The cumulative number between the moon and Mars. The space density of meteorites is with mass greater than or equal to a chosen value rn varies as shown to vary as (radius)-4 and the total mass of meteorites with 1/rn. This law holds for stone finds and falls and iron falls. The radius between 1 cm and 1 km is at least 5.6X 10- g . The iron finds include an excess of larger objects, attributed to selec- size distribution of particles produced by the crushing of rock is tion effects on the ground. If this influx has been constant, the similar to that found for meteorites and suggests that meteorites earth has collected the equivalent of an asteroid 14 km in diameter undergo a considerable number of collisions in space.