The 1967 Meeting of the AAAS: A Retrospect.

many more nonregistered visitors, Its varied content was described in detail in Science (beginning with the 22 September issue) and needs no repetition here. More than 1200 topics were offered for discussion. The AAAS sponsored 11 Invited Lectures: Carroll M. Williams (Harvard), Dame Kathleen Lonsdale (University of London), Athelstan Spilhaus (The Franklin Institute), Roger Revelle (Harvard), Cyril Stanley Smith (M.I.T.), Alfred Sherwood Romer (14arvard), Herman Kahn (Hudson Institute), Abel Wolman (The Johns Hopkins University), B. F. Skinner (Harvard), John A. Wheeler (Princeton), and Bradford Washburn (Science Museum of Boston). AAAS committees held three symposia: The Hazards of Iodine-131 Fallout in Utah; Secrecy, Privacy, and Public Information; and Weather Modification in Arid Lands. Six general symposia