Section headings and selected papers: Balloon Design and New Balloon Materials. New Balloon Materials, J. L. Rand et al. Resin blending for toughness in balloon films, M. P. Farr & I. R. Har;ison. The unrealized potential for heavy balloon payloads, J. A. Winker. NASA balloon design and flight: philosophy and criteria, I. S. Smith, Jr. Balloon Programmes and Long Duration Flights. Trans-oceanic, polar patrol balloons and future prospects, J. Nishimura. Long duration balloon flights in the middle stratosphere, P. Malaterre. Polar patrol balloon experiment in Antarctica, M. Ejiri et al. Balloons on Other Planets. Balloons for the exploration of Mars, J. Blamont. Balloons on planet Venus: final results, J. Blamont et al. The in-flight performance of the ZEBRA day-time star sensor, E. Rossi et al. Instrumentation for Balloons. Search for anti-particles of cosmic origin with a superconducting spectrometer, K. Anraku et al. Scientific ballooning payload termination loads, E. Robbins. Recent Scientific Observations. X-ray astronomy observations with a xenon filled fluorescence gated detector, J. G. Greenhill et al. Results of the balloon measurements of the stratosphere radiothermal radiation at 5mm, A. S. Kosov et al. Author index.
