General Symposia (Section A)

• 1. Geothermal Development (with Sections B, E and K).

• Healy J. The Wairakei hydrothermal system.

• Banwell, C. J. The heat resources and heat transpoit in thermal areas.

• Hugill, A. J. Geothermal research station.

• Fisher, W. M. Production of steam bores at Warrakei.

• 2. Radio-active Dating (with Sections B, E and M).

• Rafter, T. A. Radiocarbon dating.

• Ferguson, G. J. Measurement of samples for radio-carbon dating.

• 3. The Solid State (with Section B).

• Kibblewhite, A. C. The noise properties of ferro-electric materials of the barium trianate class.

• Pope, N. K. Second order infra-red absorption in alkali halides.

• Johnson, D. A. H. The absorption of ultraviolet light by halogen impurities in alkali halide crystals.

• Schroeder, P. A. Crystal growth and dislocations.

• Bogle, G. S. Paramagnetic resonance as a source of information about electric fields in crystal.

• Titchenere, A. L. Phase changes in alloys.

The following sectional papers were also read:—

• Anderson, R. A. Soft gamma radiation from an exerted state of Al²⁸.

• Brown, D. Polarization in nuclear reactions.

• Burtt, G. J. The measurement of upper atmospheric winds by radio methods.

• Chapman, N. G. Size-frequency observations of Auger showers. (Presented by C. N. Watson-Munro.)

• Chappell, D. W. G.. A relationship between magnetic stroms and solar activity.

• Court, G. W. G. An optical analogy for radio reflections from the sea.

• Dawber, K. R. The structure of the L-absorption edges of argon.

• De Lisle, J. F. Numerical weather prediction.

• Dodd, J. N. Paramagnetic resonance in the excited state of atoms.

• Ellyett, C. D. Meteoric dust in the earth's atmosphere.

• Farley, F. J. M. The ground state of He⁵

• Humphrey, R. W. Anamolous scattering of alpha particles.

• Hutchings, J. W. The planetary circulation of the earth's atmosphere.

• Jones, E. W. and Taylor, W. B. Distribution of earthquakes in the central region of New Zealand.

• Moore, H. R. The K-spectrum of neon.

• Page, G. Mass spectrometry in New Zealand.

• Ross, W. J. Some characteristics of loop aerials and a new direction finder.

• Rumsey, Mrs. F. C. A review of sensitive galvanometeres.

• Rumsey, N. J. Some aspects of distortion in lenses for aerial surveying.

• Ryder, N. V. Cloud chamber observations.

• Skinner, R. I. Gaseous discharges as microwave noise sources.

• Smith D. H. Radio propagation over 2.000 Km paths.

• Storey, J. R. Sidereal correlation of extensive air showers.

• Unwin, R. S. Some characteristics of microwave radio links over optical sea paths.

• Watson-Munro, C. N. Neutrons in Cosmic Rays.

• Whale, H. A. Radio propagation over very long paths.

• White, R. E. Scintillation counters.

• Whittle, P. Sunspot analysis.

• Williamson, K. I. The ultramicrotome.