Coincidence measurements of the absolute cross section for the production of bremsstrahlung by electrons in the field of gold atoms are reported. The incident electron energy T o was 300keV. Measurements were made for four different combinations of electron scattering angle and photon emission angle over a wide range of the relative photon energy kiT o up to k/To=0.83. The measured cross sections are compared with results of Bethe-Heitler and Elwert-Haug calculations

Backscattering coefficients for Z=13, 29, 48, 82 were redetermined with a large area proportional counter containing an insensitive tube passed by the incident beam. Results confirm our previous experience and semiempirical formula. Dressel has recently identified errors in his deviating values