UNIVERSITY of PENNSYLVANIA PHILADELPHIA 4 The School of Medicine DEPARTMENT OF MICROBIOLOGY January 16, 1953. Dr. Joshua Lederberg Department of Genetics University of Wisconsin tdadigon, Wisconsin Dear Dr. Lederberg: Do you suppose you could spare me a reprint of the extremely valuable review, Cel]. gen- j zmbi (Physiol. Rev., 32, 403, 1952). This will be most helpful for orientation in two fields in which I am particularly interested, mitochondria and lysogenic phages, as well as affording background on a number of subjects of which I know very little. Your papers are so important that they are widely and assiduously studied. Can you per- haps forgive an older scientist for suggesting that they could be useful to an even wider circle of scient- ific readers were the ratio of algebrai@ symbois and Greek roots to generally understood English words some- what reduced. Do you not feel that we do sometimes impede the broad scientific integrations that we seek to foster by the technicality of our communication? Wincerely yours, Flaccd feed SMsjlh " Stuart 3