The ion)7,ation in the is··ft bubble chamber is similar to the ANI... 12-ft bubble chamber. T}1(!lr experience shows that protons with p ~ 0.8 lab GeV can be identified by ionization. 3. :,1., Phys. Rev..!2.?, 8324 (1973)

ct J. Whitmore Phys. Letters 4 > 479 (1974). 4 F. T. Dao and J. Whitrnore, 205 GcV pp data, private c orrununicab on. 5 D. Horn, A. Schwimmers. 6

G. Blumenfeld et al., and H. 1. Miettinen, CERN Preprint Ref. TH. 1870 (June 1974). 7 S. Barish et al. Phys. Letters 4?B, 525 (1973). 8. ANL, Iowa State University, University of Maryland, Michigan State University and FNAL, Contribution to Session A2 of the Conference on High Energy Physics, London, June 1974. The quoted v~lue for f~O = -(0.5 ± O. 6). 9. We found this to be the case when scanning some rr p I'engineering'! fUn,. 10

Found in the IT - P 250 GeV engineering run (private communication /. } /1 I I i I-­ I I p /-"-/1