Tel. 23.029; 29.038 - Indirizzo telegrafico: Istgenetica - Pavia APR 10 1964 LLCS/bm April 7, 1964 ISTITUTO DI GENETICA UNIVERSITA DI PAVIA VIA SANT’ EPIFANIO, 14 Prof, Joshua Lederberg PAVIA Stanford University Vedical Center Department of Genetics Palo Alto, Calif. Dear Joshua, we have a@ program working for your specific problem; the simplest thing you can do is to send the data here. The program is written in the machine language of our computer, > and would be of no use to you as such. Mars We have tried sending the flow ~ chart in our hand to a programmer of the Rome ee 7040, but the result was disastrous. We have sin- ce written a program for 7040 in Fortran IV and tested the program in Rome. It works but it con- verges so slowly that there must be a mistake somewhere. I would not like to send it around be- fore it is fully debugged. If you send us the data we trust to be able to fit them within 24/38 hours from reception. The probabilities of being able to come next summer are going up. My trip to Ice- land is now settled from the 2ist to the 25th of July, so that I praallne able to be in SFO on the 27th. On the other hand, on September 16 I am -/ + expected to be at an Austrian Symposium. Alba and Matthew would come for the same period, Matthew may stay longer (another month) espe- . cially if his work in the Physics Department, o< > which I hope Elliott Levinthal can still pro- of vide, will prove satisfactory and he can stay over in some cheap accomodation, I will write for a visa request as soon as I will be certain, Yours bce: L.L. Cavalli-Sforza OYE wy eet ayer yen Coe hey ont ¥ [See A at rey owe. pear tts, velo Cyn f LZ wily vw. be or a mR br So a ? he “p5 one dt 4