The MSSL X-ray telescopes on Copernicus have observed Puppis-A in the energy ranges o.5-i 4 keV and I 6- keV. The measured flux in the higher energy range is used with the spectral data from the lower energy range to determine the tempreature of the remnant to be 8 + i million degrees. A spectrum which includes line emission was used to establish this result, which is in agreement with the Pup-A observations of Gorenstein, Harnden & Tucker who use a similar spectrum. A power law gives a very poor fit to the data. We find no evidence for changes in spectrum across the source.