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535covered in these experiments with an energy spread of number which was observed previously. In view of ~0.5 kev to 1.0 kev. These measurements indicate the these results, it is obvious that many interfering levels presence of some 127 resonances in the interval from must be included in any meaningful fitting of the present ~ 1 kev to 500 kev. This is more than ten times the data with resonance parameters.Using a Halpern-type photoneutron detection system, the photoneutron yields from Li, N 14 , and A 40 have been measured as a function of the maximum bremsstrahlung energy from threshold to approximately 50 Mev. The method of Penfold and Leiss was used to extract from the yield curves the total neutron cross section; (rT=