Jan. 24, 1952
Dear Joshua--
I sail for France on Feb. 15, and would like to get your stocks of P. fluorescens mutants before departing.  I already have the two that you sent to Gunny (citrulline and orotic ac.--, Leuc-Tr-SR).  Could you also include a culture of your wild type strain?  I think this would furnish a safer reference point than our culture of it.  Slants preferred!
I'm quite hopeful that this study of these strains will yield interesting results on adaptive mechanisms.  I think the other main project for the Paris sojourn will be learning serological techniques from Mel Cohen, since I begin to see the possibilities of these in enzymatic studies, particularly after talking recently to Dave Bonner.
I met Oginsky the other day, and found her very defensive about the metabolism of streptomycin-resistant E. coli.
Best wishes to you both,
Roger