Abstract
The production spectrum of charged pions and the primary cosmic ray nucleon spectrum have been derived from the experimental muon spectrum determined near the geomagnetic equator at the zenith angles 45 degrees W and 60 degrees W. The derived pion spectrum follows the relation P(Epi )dEpi =(0.22+or-0.03)Epi -(2.65+or-0.12) dEpi and the primary spectrum agrees with the relation N(Ep) dEp=2.9Ep-2.65 dEp. The results have been compared with the values expected from the vertical muon spectrum.

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