Transactions and Proceedings and Report of the Philosophical Society of Adelaide, South Australia, Volumes 31-32

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Page 80 - ... particle with a force varying as the inverse square of the distance, or whether we are to consider positives and negatives arranged in doublets, whose moment will be the important power, and whose law of attraction will not be that of the inverse square. It is a certain simplification to suppose that scattering is mainly responsible for the fading away of a stream of ft particles.
Page 202 - ... we would like to take this opportunity of expressing our thanks to Mr Wilkes for the help he has given by performing these calculations for us.f The dashed curve of fig.
Page 47 - Macgillivray, in 1852, wrote t that "formerly bark canoes were in general use, but they are now completely superseded by others, hollowed out of the trunk of a tree, which they procure ready-made from the Malays, in exchange for tortoise-shell and in return for assistance in collecting trepang.
Page 90 - ... rays (and, therefore, approximately proportional to the volume, as I have shown, Proc. Roy. Soc. of SA, Oct., 1906 ; Phil. Mag., March, 1907). The figures for the heavier atoms are rather larger for the ft than the a rays, and still larger for the y rays. It is known that the ionizations due to X rays differ considerably from those due to y rays when the X rays are soft, but approximate to them when the X rays are hard. All this fits in excellently with the theory that all four types of rays...
Page 76 - ... measurements of the velocities of the electrons which are ejected from the molecules of a gas traversed by the rays, as we have in the case of the cathode rays, so far as I am aware. But a very large amount of labor has been spent on the investigation of the secondary radiation caused by the X rays, from which we may gather much indirect evidence on the point. Perrin (Ann. Chim. Phys., XI, p. 496, 1897) has shown that the rate of production of ions per cc. by rays of given intensity is proportional...
Page 207 - VERCO, JOSEPH C. 1907-1908. Notes on South Australian Marine Mollusca, with Descriptions of New Species. Part VI, Trans. Roy. Soc. South Australia, Vol. 31, pp. 216-230, 1907; Part VII, id. pp. 311-315; Part VIII, id., Vol. 32, pp. 195-202, 1908; Part IX, pp. 345-360, 1908. VERRILL, ADDISON E. 1884. Second Catalogue of Mollusca Recently Added to the Fauna of the New England Coast and the Adjacent Parts of the...
Page 79 - The numbers which he obtained varied from 15% to 50%, according to the substance, which is the order of things we should expect if the secondary were simply scattered primary radiation. Again, the loss of velocity of the cathode particles, which is found to occur on scattering at a plate, presuming the secondary radiation to be scattered primary, is just what we should expect. In the case of the a rays no secondary radiation other than 8 rays has been found; but a small reflection of canal rays has...
Page 354 - I went very fully into this question in a paper which I had the honour of reading before the British Balneological and Climatological Society, entitled 'The Clay and Gravel Soils of London and the Relative Advantages of dwelling upon Them,' published in the Society's Journal for January, 1902.
Page 83 - Having thus discussed certain properties of the various rays which do exist, it seems interesting to make an attempt at the estimation of the properties of some rays which might exist, though the fact has not been proved as yet. Radioactive substances emit both positive and negative particles. It does not seem at all out of place to consider the possibility of the emission of neutral particles, such as, for example, a pair consisting of one a or positive particle and one £ or negative particle.

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