Neutron and proton emission due to possible solid state fusion events is monitored from a palladium sample loaded with deuterium gas to atomic fractions up to 0.7. Most of the experimental runs show no detectable activity above background rates, indicating a fusion rate <2.7 × 10−22 s−1/deuterium-deuterium (D-D) pair. Two brief excursions by the proton counter might indicate a temporary rate of 3.5 × 10−21 s−1/D-D pair.