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need not necessarily be alternations of transparency and opacity in
solution. This point is a minimum temperature. Besides, order to produce the desired effect. Very close contact between there are two cıyohydratic lines, representing the series of soluthe film and the grating is essential. -On atmospheric polarisa
tions which may exist with ice and A or ice and B as solids. In tion, by M. A. Hurion.-Researches on the higher alcohols
the other cases when A and B form a double salt D, there are two and other impurities in vinic alcohol, by M. Émile Gossart. - cryohydratic points, one for the solution in equilibrium with On the general relations which exist between the coefficients in ! ice + D + A, the other for ice + D + B; and three cryothe fundamental laws of electricity and magnetism, by M. E. hydratic lines for the solutions in equilibrium with ice + D, Mercadier. - On the reflection of electric waves at the end of 'ice + A, ice + B. When the double salt is soluble without a linear conductor, by M. Birkeland. - Multiplication of the decomposition, the two cryohydratic points are both minimum number of periods of sinusoidal currents, by M. Désiré Korda.
temperatures, and therefore there must exist a maximum tempeOn the hygroscopic properties of several textile fabrics, by M. Th.
rature on the line for ice + D; this maximum relates to the Schlæsing fils.-Contribution to the study of the Leclanché cell, solution which presents the same relation A/B as in the double by M. A. Ditte. -Attempt at a general method of chemical syn
salt. All these conclusions may be deduced from thermoe thesis ; formation of nitrogen compounds, by M. Raoul Pictet. dynamical rules; they were confirmed in experimental research -On the stereochemistry of the malic compounds, and the by Mr. Schreinemakers. variation of the rotatory power of liquids, by M. Albert Colson. -On a chlorobromide of iron, by M. Lenormand.-On the saccharates of lime, by M. Petit.-On a new soluble ferment
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carried oui by Public Works Department (Sydney, Potter). – The Principles
of Agriculture: G.Fletcher (Derby, Central Educational Company). - Science ammonite layers of the inferior Malm in the county of Monte
et Religion : T. H. Huxley (Paris, Bailllère).-Au Bord de la Mer : Dr. junta, Portugal ; little known phases in the development of the E. L. Trouessart (Paris, Baillière! - Confé ences Scientifiques et Allocu. mollusca, by M. Paul Choffat.-On the mode of reproduction
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-On the Effects of Urban Fog upon Cultivated Plants : Prof. F. W. Oliver (Spottiswoode).
- The Fundamental Hypo heses of Abstract Dynamics : Physical Society, March 10.-Prof. Kundt, President, in Prot. J. G. MacGregor.- Il Clima di Torino: G. B. Rizzo (Torino, Clausen).the chair. - The President gave an account of some researches On the Application of Interference Methods to Spectroscopic Measureundertaken as an introduction to the study of Hall's phenomenon.
ments: A. A. Michelson (Washington, Smithsonian Institution).- RecreaAs is well known, this is directly proportional to the intensity of
tion : W. Odell (Torquay, Iredale).
Serials.- Journal of the Chemical Society, April (Gurney and Jackson). the primary current, but inversely proportional to the pressure Annalen des k. k. Naturhistorischen Hofmuseums, Band viii No. 1 (Wien, of the plates ; on the other hand, it is not strictly proportional Holder). — Timehri, No. xxii. (Stanford) -Notes from the Leyden Museum, to the magnetising current in the case of the several metals so
vol. xv. No. 2(Leyden, Brill).- L'Anthropologie, tome iv. No. 1 (Paris,
Masson). - Journal of the Royal Microscopical Society, April (Williams far examined, and it appeared probable that it might more pos- and Norgale):- The Asclepiad, No. 37. vol. x. (Longmans). — Records of sibly be proportional rather to the magnetisation of the plate. the Geological Survey of India, vol. xxvi. Part 1 (Calcutta). Prof. Kundt wished to test this possibility in the case of iron, nickel, and cobalt, employing transparent metallic films of these
PAGE metals magnetised to 28,000 units, whose magnetisation could
CONTENTS. be iested directly by means of their rotatory power. It was
Dynamics in Nubibus
601 found that the Hall effect increased hand in hand with the in
Vertebrate Biology. By W. N. P.
605 crease of rotatory power, and therefore proportionally to the
Our Book Shelf:magnetisation of the plates. The effect was, as Hall had already
Marilaun : “ Pflanzenleben.”—D. H. S.
605 shown, positive in the case of iron and cobalt, negative in that
Giacosa : “ Bibliografia Medica Italiana
606 of nickel. Bismuth deposited electrolytically in a transparent Letters to the Editor :
Balfour : The Evolution of Decorative Art"
606 film gave very feeble or no results, whereas, when drawn out into a thin plate the effect was considerable.—Dr. Wren spoke Palæontological Discovery in Australia.-Prof. Alfred on Maxwell's proposition that waves of light exert pressure in
боб the direction of their transmission, as proved in a certain case
An International Zoological Record. -Dr. Herbert by Boltzmann. He deduced, under certain assumptions, a
606 sórmula for the calculation of temperature based upon a deter
Lion riger and Tiger-lion Hybrids-Dr. V. Ball, mination of maximal energy.
607 Soot-figures on Ceilings. (Illusirated.)–E.B. Poul. AMSTERDAM.
ton, F.R.S.; Prof. Oliver Lodge, F.R.S. Royal Academy of Sciences, March 25. — Prof. van de The Use of Ants to Aphides and Coccidæ. -T. D. A. Sande Bakhuysen in the chair.—Mr. Pekelharing spoke of the
608 peptone of Kühne. Some years ago he argued there was not a Blind Animals in Caves.-G. A. Boulenger. 608 real difference be! ween the substances called pept ne, and the Observations in the West Indies. By Prof. A. substance called propeptone or hemialbumose. The researches Agassiz.
608 of Kühne and his disciples afterwards proved that what was Artionyx-a Clawed Artiodactyle. (With Diagrams.) called peptone by Schmidt-Mülheim and by Salkowski, con- By Prof. Henry S. Osborn
610 tained albumose. But it was not proved hy Kühne that the The Hodgkins Fund Prizes. By Prof. S. P. Langley 611 substance called by himself peptone was really free from albu- The Solar Eclipse
611 mose. Out of a solution of Kühne's peptone, salurated
612 with ammoniumsulphate, there can be precipitated by meta- Our Astronomical Column:phosphoric acid, and more fully by trichloracetic acid, a sub- Large Telescopes
616 stance which has the properties of albumose. It gives the Spectrum of B Lyræ .
616 biuretreacıion, it is precipitated, the reaction may be acid, Société Astronomique de France
616 neutral, or alkaline, by ammoniumsulphate, it is precipitated hy Wolsingham Circular, No. 34
616 picrinic acid, and, in acid solution, by saturation with natrium | Astronomical Journal Prizes
616 chlorid. So it is clear that there is no ground for believing Geographical Notes with Kühne that the substance called by him peptone is a sub- Institution of Mechanical Engineers
617 stance sui generis, and not an impure albumo.e. -Mr. Bahhuis Coni'ers. By G. N.
619 Roozeboom dealt with the cryohydrates in systems of two salts. The Earthquakes in Zante
620 Three cases are to be considered. The first is that the iwo salts Scientific Serials
620 may exist without combination. Then there is a cryohydratic Societies and Academies
621 point in which the two salts A and B exist with ice next the Books, Pamphlets, and Serials Received
617 NEW WORK BY PROFESSOR MILNES MARSHALL.
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