1> that have been recently used by MIle of us (~.) in a measur~ment of Ki. -+ 1£01£0 at CERN. The energy resolution of the counters is expected to be ~ (2-3)% for photon energies above 20 BeV. The diameter of the counters are 10 em. Placing the counters 5 m downstream of the target gives t:.e/e ~ lOmr. The electronic circuits for the experiment are all standard and the data will be recorded by a standard multichannel pulse height, analyser. To change the photon angle the table is 'rolled' to another position in the tunnel. The counter arrangement will be as follows where Sl is used to veto charged particles, C is a thin radiator to con vert the photons, Sz and,the Pb glass counter are put in coincidence. *