operation. Horeover, 've have established (Figure 6 of the original pro­ posal) that,ve can identify scatters I::ven without measurement of a 2 scattered muon upstream of the magnet. Only forq2 < 0.3 GeV will the extra precision be necessary. Experimental Plan The plan of this ~xperiment is to use about 500,000 muons per pulse at 150 GeV. The present beam line, if all magnets are adjusted, is capable of an intensity ~/p = 2 x 107 at E = 30 WithE = 150 GeV (although p ~ 1 x 107 was obtained during previous runs due to component failures) 0 GeVE = 40 E = 150 GeV we expect ~/p ~ 4 x 10-7•. Thus ~he p ~ 12 planned beam intensity may be achievable with 10 protons/pulse or with a less optimal beam (e.g., a narrow band train). An appreciable fraction of the running (on lead) can be at a lower intensity still. Therefore we suggest that this experiment can be run at one of the many times when a full intensity muon beam is not available. The apparatus configuration for P448 is not as critical as E398, or E