The Mainz (1976) data on deuteron photodisintegration cross sections at €) , ' @ (c.m. -centre of mass) were done at six energies from E, = 20120 MeV, and have been confirmed by recent measurements at Louvain and Indiana. In view of calculations that predict a dip in the 0 cross section at E, = 10 MeV, the Mainz group are currently engaged in measurements at 0; = 0°, E, = 10 MeV. The principle of the measurement is that a bremsstrahlung beam is incident on a deuterium target and the photoprotons are detected in a magnetic spectrometer, while the rest of the beam passes through a beam intensity monitor located downstream. The beam monitor is calibrated, using the same spectrometer system, to measure the yield of Compton electrons. For both the photoproton and Compton electron measurements, the target was 0.1-mm-thick CD2, which is feasible because the beam energy is below the 16-MeV thresh-