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1966-67 NEW FILMS 93 obtained from various shearing and leaching tests con- ducted at ORNL. PEACEFUL USES OF NUCLEAR EXPLOSIVES (PLOWSHARE) SAFETY IN THE PLOWSHARE PROGRAM (1966). 22 minutes, color. Produced by USAEC's Nevada Operations Office. For sale by Consolidated Film Industries, 959 Seward St., Hollywood, Calif. 90038, at $67.83 per print, including shipping case, F.O.B. Hollywood. Available for loan (free) from USAEC headquarters and field libraries. Cleared for television. This motion picture, which is a companion piece to the USAEC film "Plowshare," documents the means taken to ensure the safety of the public during experiments or projects in the U. S. program to develop peaceful uses of nuclear explosives. The film relates the effects of under- ground explosions to the varying purposes for the explo- sions and to public safety. Nuclear explosives, precisely controlled, are powerful, compact and relatively inexpensive sources of energy which may help produce oil and gas, mine minerals, dig harbors, canals, and mountain passes, and provide im- portant scientific knowledge. Each of these applications uses one or more of the effects of nuclear explosions: heat, explosive force and radiation. The film explains that to allow for the safe and dependable use of nuclear explo- sives, each of these effects must be thoroughly understood. The effects, their safety implications, and the precautions taken for public safety are demonstrated. The film explains that technical advances in the design of Plowshare explosives make it possible to reduce to a very small amount the radioactivity produced by an explo- sion. In cratering explosions, methods of emplacing the explosive underground result in the release to the atmo- sphere of only a small part of the radioactivity produced. In these explosions, as well as in explosions which are contained completely under the earth's surface, contamina- tion of underground water supplies does not appear to be a major problem. Other effects of nuclear explosions —ground shock, air blast, and dust clouds—require safety procedures similar