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In view of the importance of a pure milk supply, we considered that it might be of interest to examine chemically, microscopically, and bacteriologically, a number of specimens of milk coming into the Metropolis for which purpose we decided to select samples from the various counties, the milk of which is consigned to London. We found that milk so consigned comes from about twenty-six counties extending from Derby in the North, to Hampshire and Devonshire in the South and South-West, and from Hereford in the West, to Norfolk in the East.
After August 1944, the implosion program began to engulf a growing fraction of the laboratory's personnel. Considerable research during the fall and following winter focused on experimental diagnostics. Seven parallel experimental programs – RaLa, betatron, magnetic, and electric pin studies, in addition to the original X-ray, photographic, and terminal observations – brought the most current techniques of experimental physics to bear on implosion problems. The foremost tasks were to determine the collapse time, compression, and symmetry, and to assess different explosives and explosive system designs. Informed trial and error was the approach most frequently taken in these simultaneous lines of experimental inquiry, since theoretical understanding was still incomplete. While each program offered its particular advantages, many efforts overlapped, adding modest confirmation to the amassing body of understanding. Despite lingering uncertainties about the feasibility of an implosion weapon, the six months following the August 1944 reorganization saw the central research question of the laboratory shift from “Can the implosion be built?” to “How can the implosion weapon be made?”