la replying, please quate theie numbers N.S.50/119 VELEPHONE 61-179 Ail correspondence to be addressed NEW ZEALAND to Director DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH DIVISION OF NUCLEAR SCIENCE PRIVATE BAG, LOWER HUTT. 18 March, 1959 Professor J.Lederberg, Dept. of Genetics, Stanford University, Stanford, California, U.S.A. Dear Dr Lederberg, Thank you for your very interesting letter. I think you are most certainly right in that the earth accretes quantities of N in the form of meteoritic material, but as you point out the quantities are probably low. I enclose an account of further work in which you might be interested and will send on ATW a reprint of the letter to Nature when they arrive from England. Yours sincerely, AT Wiki A.T.Wilson for Director Enel: