18241. Announcement of Maurice R. Hilleman's appointment at the Merck Institute

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18242. Announcement of Lederberg Lecture entitled "The Investigation of Extra-Terrestrial Life"

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18243. Announcement of 1953 Cold Spring Harbor Symposium on Quantitative Biology

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18244. Annotated table of contents for book for the Carnegie Commission on Science, Technology and Government with Jesse H. Ausbel

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18245. Animals for Research

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18246. Analytical Instrumentation

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18247. Analysis of Prototrophs from K-12 Crosses, Reversed with Respect to F+ Polarity

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18248. An Instrumentation Crisis in Biology

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18249. An Initial Problem Statement for a Machine Induction Research Project

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18250. An Infective Factor Controlling Sex Compatibility in Bacterium coli

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18251. An Inexpensive Narrow Pass Filter for 254 mu Ultraviolet (Iodine-Methyl Cellulose)

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18252. An Illustrious Scientist's Life, Recounted With A Lyric Touch [Review of "The Statue Within: An Autobiography" by Francois Jacob]

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18253. An Experiment on the Diffusion of Salmonella Cell Suspensions Through Filter Paper Strips

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18254. An Asteroid Into the Sun May Have Glazed Moon Rock

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18255. An Artificial Intelligence Directed Analysis of Regional Survey Data in Archaeology

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18256. An Appraisal of POSTS as an Interdisciplinary Effort

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18257. An Analysis of the History of Infectious Nucleic Acids

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18258. An Algal Regenerative System for Single-Family Farms and Villages

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18259. An Affirmation

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18260. An Ache to Learn

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