New developments in high pressure living

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Title: New developments in high pressure living
Author: Bond, G
Abstract: In presenting a discussion of the atmospheric problems inherent in a closed ecological system (submarine, spacecraft, some industrial plants), the author recounts his experiences in Project Genesis I. Experimental animals were exposed first to compressed air then to various synthetic atmospheres. It was established that 100% oxygen was lethal; that a nitrogen-free atmosphere produced no adverse physiological effects. Various proportions of helium and oxygen were tried. After two years of experimentation, it was established that all animals exposed to a selected mixture of helium, oxygen, and lesser quantities of inert gases, not only survived a 14-day exposure at a simulated depth of 200 feet, but could be safely returned to sea level with no physiological damage. Decompression schedules in a separate series of experiments. Studies with human subjects came next, in three phases: at ambient pressure, at 100 foot and then 200 foot equivalents, breathing an atmosphere composed of 3.5% oxygen, 4.5% nitrogen, and 92% helium. No deleterious effects were found; the only problems were heat loss and difficulty in speech communication.
Description: Citation Status: Active; Citation Classification: Unclassified; Title Classification: Unclassified; Report Classification: Unclassified; Identifier Classification: Unclassified; Abstract Classification: Unclassified; Distribution Limitation(s): 01 - APPROVED FOR PUBLIC RELEASE; Information provided by the Department of Defense and the Defense Technical Information Center ( is considered public information and may be distributed or copied unless otherwise specified. Use of appropriate byline/photo/image credits is requested.
Date: 1964

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