March 31, 1952

Dr. o. fi. Bruner
Cornell University ~
Ithaca, liaYe ©

Dear De. Bruner:

. 2 am weitlag to you at the auggestica of Dr. P. R. Sdearde. I had
@pplied to hia for a sulture of the flagellated but non-motdis form
ok jauanella sandicgo, described in PSMBu, 62:296, 1946. The culture
had evidently been lost cr discarded, but he thoukht there wae a pog-
aibility you might have kept an eye on it. Lf you still have this

. @ullure, or suz suggestion as te iis survival anyvhere, I should be

grateful for it. Do you suppose any other. paralyzed variants have
turned up la groups 8 or D?

vur interest dn this culture stems from our curren’ work on the
genstics of “yecombloation” in Sclucuellc. (erhaps you will be interested |
in the sicaeced Interia repert, ag it will be seme months befors our an
ms. reaches print. At the monent, we are especially interested in »
sebility, wad are trying te collect ac many kinds of non-motile varlante |
as we Can locate. In fact, I woader if I might not ask you whether you
huve noticed any C-warlants (ospecially in group 2 or BD) that ave Lakely
hot to be dupLicated in Dr, Siwards! eallectdon, It is too bad there 4s
no aystem.tic way of producing cr daclating such variants, but lacking
it, I em obliged to beg tham of other workers, |

If i have act done so previously, imag I think you for your kind

letter of October 19, 1951 about "Mhcorobial Genetics”, and for your
cooperation that permitted 1t to reash the standard it did reach.

Yours sincerely,

doshus Lederberg _