Variation of the Position of the Cosmic-Ray Neutron Intensity Maximum with Geomagnetic Latitude

It has been experimentally demonstrated that there exists a maximum in the cosmic-ray neutron intensity when plotted as a function of altitude or pressure. The position of this maximum at various geomagnetic latitudes in the northern hemisphere has been measured by experiments which used balloon-borne unshielded B${\mathrm{F}}_3$ counters with various enrichments of the ${\mathrm{B}}^{10}$ isotope. It has been found that the position of the maximum varies approximately parabolically when plotted as a function of geomagnetic latitude. The range of variation is from about 120 millibars at the equator to about 70 millibars at the north geomagnetic pole. The experimental results are compared with theory.