Journal and Proceedings of
The Royal Society of New South Wales
Volume 102 Parts 3 and 4 [Issued November, 1970]
CONTENTS
| AUTHORS & TITLES | PAGES |
| Burman, R., A Solar Charge and the Perihelion Motion of Mercury | 157-158 |
| Auld, Bruce A., The Distribution of Eupatorium adenophorum Spreng, on the Far North Coast of New South Wales | 159-161 |
| Neuhaus, J.W.G., Chemicals in Food [Presidential Address, 1970] | 163-167 |
| Hamilton, L.H., Helby, R. and Taylor, G.H., The Occurrence and Significance of Triassic Coal in the Volcanic Rocks near Sydney | 169-171 |
| Golding, H.G., The Coolac-Goobarragandra Ultramafic Belt, N.S.W. | 173-187 |
| Pels, Simon, Radio-Carbon Datings of Ancestral River Sediments on the Riverine Plain of South-eastern Australia and Their Interpretation | 189-195 |
| Read, H.W., and Cook, A.C., Note on Coals Containing Marcasite Plant Petrifactions, Yarrunga Creek, Sydney Basin, New South Wales | 197-199 |
| Klotz, A.H., Meson Field Potential in Fundamental Theory | 261 |
| Smith, W.E., The Energy Storage of a Prescribed Impedance | 203-218 |
vol. 102 parts 3-4, pp. 157-158
A Solar Charge and the Perihelion Motion of Mercury
R. Burman
Abstract. The effect of a possible net solar charge on the perihelion motion of Mercury is examined by using non-relativistic mechanics and by using the Reissner-Nordström metric of general relativity
vol. 102 parts 3-4, pp. 159-161
The Distribution of Eupatorium adenophorum Spreng, on the Far North Coast of New South Wales
Bruce A. Auld
Abstract. Eupatorium adenophorum Spreng, crofton weed, has remained a major problem in certain areas on the far north coast of New South Wales in spite of a long continued eradication programme. In some areas the weed had been effectively controlled using mechanical and chemical methods. An analysis of the ocuurrence of crofton weed with respect to a number of environmental factors revealed that rainfall, tree cover and steepness of land each appeared to influence distribution. It was estimated that there was a 76% chance of the occurrence of a significance infestation in areas which had steep land, no tree cover and an annual rainfall in excess of 70 inches. Inaccessibility of steep land with respect to the normal control measures was considered to be the main factor limiting the progress of crofton weed eradication in the area.
vol. 102 parts 3-4, pp. 163-167
Chemicals in Food
[Presidential Address, 1970]
J.W.G Neuhaus
Introductory Paragraphs: All food consists of mixtures of chemicals. These are typically proteins, carbohydrates and fats, with minor proportions of phospholipids, sterols, vitamins, minerals and alkyloids, among others. This address is not concerned with the major chemical complexes of food, but rather with the minor components, whether naturally present or deliberately or accidentally added.
Our food embraces many plants and animals which contain chemicals with known toxic properties as natural components. Generally, man has learnt to avoid dangerous exposure to these components of his food, but under special circumstances, such as unusual concentration, for example, accidents occur. Acute toxicity, which is frequently recognized and the source frequently identified, is much rarer than chronic toxicity. The latter only becomes evident after long exposures, and is almost never related to the causative agent.
vol. 102 parts 3-4, pp. 169-171
The Occurrence and Significance of Triassic Coal in the Volcanic Rocks near Sydney
L.H. Hamilton, R. Helby, and G.H. Taylor
Abstract. The breccia pipes near Sydney contain numerous inclusions of coal. Spores have been macerated from some of this material, the microflora obtained being no older than Hawkesbury Sandstone equivalent. The coal both in the breccia pipes and in the peripheral contorted zones is of bituminous rank, which is evidence that it has not been heated above quite modest temperatures.
vol. 102 parts 3-4, pp. 173-187
The Coolac-Goobarragandra Ultramafic Belt, N.S.W.
H.G. Golding
Abstract. The Coolac-Goobarragandra ultramafic belt, in the south-east of New South Wales, delineates a steeply inclined sheet of peridotite and serpentinite 56 km. long and up to 2 km. thick, which occupies a tectonic zone between western Lower Palaeozoic beds and the Siluro-Devonian Burrunjuck granite mass on the east.
Petrologically critical components of the principal rock association of tghe belt include predominant cataclastic harzburgite which encloses autolithic Cr-rich and Al-rich chromitite pods, and gabbro-derived garnet-vesuvianite rodingite veins and rootless dykes which penetrate both the harzburgite and the chromitites. A magmatic gabbro-wehrlite complex of doubtful status occurs in the north.
The whole association is tentatively interpreted as a mush- and tectonically-re-emplaced and partially re-intruded abyussal complex in which a quasi-stratiform configuration of harzburitic mush and basic magma components at depth was to some extent reproduced but also telescoped at a shallow crustal level.
vol. 102 parts 3-4, pp. 189-195
Radio-Carbon Datings of Ancestral River Sediments on the Riverine Plain of South-eastern Australia and Their Interpretation
Simon Pels
Abstract. This paper deals with the configuration of Quaternary sediments of the Riverine Plain. The originin of fluviatile sediments and their relationship to the present river system is discussed. It is shown that the Older Alluvium of the plain is relatable to a series of prior streams which are still traceable as a relict distributary stream system. The Younger Alluvium is deposited by ancestral rivers which form a tributary pattern. The ancestral river system displays evidence of three separate phases of stream activity. Radio-carbon datings of wood samples from sediments representative of the three phases are presented. Results substantiate the earlier published relative chronology. A paleaeo-climatic interpretation of the presented carbon dates, and those published previously, is put forward.
vol. 102 parts 3-4, pp. 197-199
Note on Coals Containing Marcasite Plant Petrifactions, Yarrunga Creek, Sydney Basin, New South Wales
H.W. Read and A.C Cook
Abstract. Coals od low bituminous rank, resembling a coal from the Clyde River Coal Measures, contain numerous plant petrifactions of marcasite with minor pyrite. The iron sulphides were emplaced early in the history of the coal and are associated with vitrinite-rich layers. They have replaced plant tissue rather than filled up voids in the peat. Massive marcasite is thought to represent complete replacement, whereas the material with relict plant structure may represent an intermediate stage.
vol. 102 parts 3-4, p. 201
Meson Field Potential in Fundamental Theory
A.H. Klotz
Abstract. It is shown that Yuakawa's potential of a meson field can be generated within Eddington's Fundamental Theory.
vol. 102 parts 3-4, pp. 203-218
The Energy Storage of a Prescribed Impedance
W.E. Smith
Abstract. The problem of inferring the total average energy of a passive linear electrical impedance from its observed or specified terminal behaviour alone is discussed. Only in a few special cases is the energy storage (for sinusoidal external excitation) uniquely determinable.
A general expression for the energy storage is derived which involves, in addition to terminal properties, properties of a set of functions describing the separate dissipative processes. This expression is used to find a new minimum energy storage for a lumped-element network which all realizations of the impedance must equal or exceed. There exists a minimum energy synthesis storing energy at all frequencies, which corresponds to minimum phase shift Darlington synthesis of the impedance. This minimum energy storage synthesis can be realized provided gyrators can be employed.