np elastic spin-transfer measurements at 485 and 635 MeV.

'Current Address: Los Alamos National Laboratory, Los Alamos, NM 87545. t Current Address: PSI, LG I25, CH 5232 Villigen PSI, Switzerland. ~ Deceased. coefficients as high as 76%." "To stabilize the solution, Wolfenstein (spin-transfer) parameter data are required of similar quality to those at 800 MeV. " We present these new data here. With the inclusion of these data, Bugg reports stable solutions with small correlations at 650 MeV. Previous spin-dependent data near 650 MeV include the analyzing power [2], the four spin-correlation parameters [3—6], and the four spin-transfer parameters reported here. These data are sufhcient to over determine the elastic nucleon-nucleon amplitudes [7]. Previous measurements of the spin-transfer parameters are discussed in Sec. IV. The normalization of both present and previous LAMPF data is discussed in Sec. III.