Two large new bubble chambers were successfully tested this October and are expected to begin recording neutrino‐nucleon interactions early this year. One of the chambers, the largest ever built, was constructed at Argonne by a team headed by E. G. Pewitt (PHYSICS TODAY, February 1968, page 57). The second chamber, built at Brookhaven under the direction of Ralph P. Shutt, is a prototype of a 25‐foot chamber planned for the National Accelerator Laboratory (NAL).

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