November 12, 1952

Dear Dr. Boydk

Thank you very mich for your two shipments of Salmonella typhiaurium,

which arrived similtaneously, day before yesterday. They appear in very
good order.

I have beer: especially interested in the transgressive specificities
of these phages. Unfortunately, none of the eight strains of Sala.
bovis-morbificans that we have here appears to respond either to A3 or
to Al. It would save me a good deal more preliminary work if I eould
have the particularty strains of 8. bovis-mcrbificans and of S$. paratyphi C
that are auntioned in table V of your 1950 paper (JPB 62,501) as suscep-
tible to Al, A3 and B4 respeatively.

To answer one of the questions I put to you in ay previously letter,
I have picked up 2 few of the rough-specific phages mentioned by Burnet.
A rough variant of your 1404 strain, cbtained very readily from aged broth
cultures, sorves as indieator. You can find euch a phage without dirri-
culty in culture "LT-3", which I hope Dr. Stocker will hava brought to you.
LT-1O appears to have one also, but this is leas readily brought out.

Yours gincersty,