Range Distribution of Sea-Level Mesons at Low Geomagnetic Latitudes

Seven points of the meson differential spectrum at sea level have been obtained at a geomagnetic latitude of 29°N. The method used was that of delayed coincidences and anticoincidences, and the range interval covered has been from about 10 to 320 g/${\mathrm{cm}}^2$ of air equivalent. In this interval our spectrum curve is found to be nearly flat; that is, it does not show a clear maximum around 200 g/${\mathrm{cm}}^2$ air equivalent, as indicated by several authors working at geomagnetic latitudes around 45°N.