1. This system is, in principle, similar to the one reported byGrigorov et al. (1)S. I. Brikker, N. L. Grigorov, M. A. Kondrateva, A. V. Podgurskaja, A. I. Saveleva, V. A. Sobinjakov and V. Y. Sestoperov: who have used photographic emulsions in conjunction with ionisation chambers for the investigation of high energy interactions.
2. S. I. Brikker, N. L. Grigorov, M. A. Kondrateva, A. V. Podgurskaja, A. I. Saveleva, V. A. Sobinjakov andV. Y. Sestoperov:Suppl. Nuovo Cimento,2, 733 (1958).
3. W. Y. Chang andS. Rosenblum:Phys. Rev.,67, 22 (1945);A. Ryts:Helv. Phys. Acta,22, 1 (1949);R. D. Connor:Proc. Phys. Soc., B64, 30 (1951);N. K. Saha andNarendra Nath:Nucleonics,15, 94 (June, 1957);M. J. Swetnick andN. G. Anton:Nucleonics,15, 93 (June, 1957);R. W. Pidd andL. Madansky:Phys. Rev.,75, 1175 (1949);J. W. Keuffel:Rev. Sci. Instr.,20, 202 (1949);E. Robinson: A66, 73 (1953);F. Bella andC. Franzinetti:Nuovo Cimento, Proc. Phys. Soc.,10, 1461 (1953);T. E. Cranshaw andJ. F. de Beer:Nuovo Cimento,5, 1107 (1957).
4. N. L. Grigorov, V. Y. Shestoperov, V. A. Sobinyakov andA. V. Podgurskaya:Žurn. Ėksp. Teor. Fiz.,33, 1099 (1957).
5. S. Naranan, R. Raghavan, P. V. Ramanamurty, B. V. Sreekantan andA. Subramanian:Nuovo Cimento,16, 401 (1960).