The maximum value of the analyzing power A for pp elastic scattering has been measured at 17' lab as a function of energy from 318 to 800 MeV. No unexpected energy dependent structure is observed at the 0.5%%uo level.NUCLEAR REACTIONS 'H(p, p}'H, E = 318 -800 MeV, measured A at Olab = 17 .The observation of energy dependent structure in proton-proton scattering has generated much interest recently. Significant structure has been observed in the medium energy range in measurements of Aoy, Aol, A~~~a nd ALL . ' The
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