ABSTRACTMathematical investigation of the vertical distribution of iron meteorites in the Earth indicates that the amount of meteoritic iron buried below maximum plow depth greatly exceeds the amount above this level. Thus, there is urgent need for instruments capable of detecting deeply buried iron meteorites. In this paper, a brief review of the physical principles underlying the operation of such meteorite dectectors is given. Difficulties encountered in field use of such equipment are discussed on the basis of experience gained as Director of the first Ohio State University Meteorite Survey; and results secured in an investigation of the Odessa, Texas, Meteorite Crater, made at the invitation of Professor W. D. Mateer, Supervisor of the Meteorite‐Crater Project of the University of Texas in September, 1939, are summarize