Limits to the Spectra of the Perseus and Coma Clusters above 7 keV from the OSO-7.

Observations of the Coma and Perseus clusters were made with the UCSD OS 0-7 X-ray telescope. The 2 a upper limit to the 7-40 keV flux from the Coma cluster is <2 x 10-2 photons 1 Wefind the 7-26 keV flux from Perseus ( 3 a) to be 1.9 + 0.63 x 10-2 photons 1, and a 2 a upper limit to the 26-56 keV flux from the Perseus cluster to be 9 x 10- photons em -2 - . The data do not allow us to distinguish between various possible X-ray emission processes from the cluster. Subject headings: galaxies, clusters of - X-rays