. eventually play important roles in this work, were Donald J. Cummings and David Friefelder. Don was working on T2 bacteriophage structure with Lloyd Kozloff, and Dave was a member of the Uretz lab. Don and I became very close friends and spent many hours gabbing about our work, often during endless games of bridge in smoke-filled living rooms. This friendship with Don proved invaluable after graduation. Don received his degree before I, did a postdoc with Ole Maaløe at the University Institute of Microbiology in Copen- hagen, and then accepted a position at the National Institutes of Health in Bethesda to continue his work with T2 in a unit headed by Ernst Freese. I, on the other hand, was committed to 2 years of active duty service after being enrolled in the Army Reserved Officers’ Training Corps at Johns Hopkins. Fortunately I was able to transfer from the Army to the Commissioned Corps of the U.
S. Public Health Service, and to serve my time at NIH, thanks to a convincing letter to whomever makes these transfer decisions and the blessing of Freese. So in the fall of 1961, I was given a desk in Don’s laboratory, as well as a small room down the hall with a walk-in incubator and an indispensable model A Coulter Counter in order to continue developing the filtration synchrony technique.