Journal and Proceedings of
The Royal Society of New South Wales
Volume 104 Parts 3 and 4 [Issued Jan 10 1973]
CONTENTS
| AUTHORS & TITLES | PAGES |
| Burman, R.R. On Hoyle's Electrodynamic Version of the Steady-State Cosmology | 121-122 |
| Branagan, D.F. Words, Actions, People: 150 Years of the Scientific Societies in Australia | 123-141 |
| Smith, William K. Radiation Pressure and Related Forces (Presidential Address 1971) |
143-149 |
| Gibbons, G.S. Note on Sandstone Dykes at Minchinbury, N.S.W. | 151-152 |
Vol. 104 Pts 3-4 pp.121-122
On Hoyle's Electrodynamic Version of the Steady-State Cosmology
R.R. Burman
Abstract. Hoyle once published a version of the steady-state cosmology, based on Proca's equations, in which separation of matter and anti-matter produces an intergalactic magnetic field. Here, the constants in that theory are evaluated by using recent results on intergalactic Faraday rotation.
Vol. 104 Pts 3-4 pp.123-141
Words, Actions, People: 150 Years of the Scientific Societies in Australia
D.F. Branagan
Address given in commemoration of tbe sesquicentenary of the foundation of the Philosophical Society of Australasia.
Read full text here
Vol. 104 Pts 3-4 pp.143-149
Radiation Pressure and Related Forces
William K. Smith
[Presidential Address, 7th April, 1971]
Abstract. The phenomenon of radiation pressure is introduced and briefly surveyed. The Larmor theorem and the adiabatic theorem are used to deduce expressions for radiation pressure, and to show that radiation pressure is a normal concomitant of wave propagation.
Electromagnetic radiation pressure is discussed in some detail using the author's generalized steady force theory for arbitrary loss-free systems. This approach emphasizes the unity of radiation pressure, and quasi-stationary forces, regarded here as related forces. It is shown that the generalized adiabatic theorem includes the content of much previous theoretical work. Practical applications are also discussed.
A similar formulation is given for acoustics leading to a corresponding generalized adiabatic theorem. Radiation pressure effects in oceanography are mentioned briefly but not discussed in detail.
Vol. 104 Pts 3-4 pp.151-152
Note on Sandstone Dykes at Minchinbury, N.S.W.
G. S. Gibbons
(Communication to the Editor)
Abstract. The geometry and petrology of a sandstone dyke formerly exposed in a basalt-breccia pipe at Minchinbury (N.S.W.) indicate that a mass of sand behaved as a fluid shortly after the breccia was formed. If the breccia now exposed represents the vent of a volcano, it may be that similar flow processes occurred within the breccia itself.