BERKELEY: DEPARTMENT OF BACTERIOLOGY Auguat 23, 1750, Dear bree Adler: The Sulsonelia etrains which Yr. Hershey pasced on to you were, 1 beliewe, originally collected by .«%e Edwards at the Uni- versity of Kentucky. I reesived the dercd@diately fron «i's 30rman at the Connecticut rublic Heults Laboratory, Hartford. They are in-~ cluded in my summary of Salnoneila nutrition ( Arch. Siochem., 13, 287 (1-47)), but are not, aa fur us I know referred to in any otucor publisation. Burnet und MekKie huve studied lyeozenicity in 9. ty hicvuriur: and J. enteriditis in some detail, using 3. gaildnsru. (sungeineriu:) as an indicator strain (Austr. J. Exre Blole beds Sede, 6:276, 72), and Lobe £8.;. I will have to walt until I return to Sadison to find any further details: IT sees to recall that S¥-13 46 a blochamfesl mutant vbtaised from a univus monophasic typhi-nuriur. Sincerely, Joshua Tederbor: Associate :'rofessor of Genotics, UNTIVa . ITY GP GISoONLIN, Fadisonu. UNIVERSITY OF CALIFORNIA—(Letterhead for interdepartmental use)