1) a fuller protocol, especially as to medium, of your experiment on the accumulation of prototrophs in mixed cultures growing
in complete medium, and
2) a line to the student at P&S whom you mentioned as interested in studying the genetics of pathogenicity in S. typhimurium.
Mr. Zinder has been getting some very encouraging results, but he'll be quite busy working out the more direct genetic
angles, and I'm thinking primarily of prearranging some postgraduate work here possibly.