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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 ciyohydratic lines, representing the series of solathe 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 presenıs 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
BOOKS, PAMPHLETS, and SERIALS RECEIVED. saccharates of lime, by M. Petit.
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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.-Conféiences Scientifiques et Allocu. mollusca, by M. Paul Choffat. -On the mode of reproduction
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PAMPHIETS.- Meteorological Results deduced from Observations taken
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Prol. J. G. MacGregor.-I1 Clima di Torino: G. B Rizzo (Torino, Clausen). — the chair. - The President gave an account of some re-earches 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).-Recrea. As 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) -Noies 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, far examined, and it appeared probable that it might more pos
Masson).- Journal of the Royal Microscopical Society, April (Williams
and Norgaie).- 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 be tested 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 : “ Pfanzenleben."-D. H. S.
боб shown, positive in the case of iron and cobalt, negative in that Giacosa : “Bibliografia Medica Italiana of nickel. Bismuth deposited electrolytically in a transparent
Balfour : “ The Evolution of Decorative Art'
606 film gave very feeble or no results, whereas, when drawn out
Letters to the Editor :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
606 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 fórmula for the calculation of temperature based upon a deter
Lion tiger and Tiger-lion Hybrids-Dr. v. Ball, mination of maximal energy.
Soot-figures on Ceilings. (Illustrated. )-E.B. Poul. AMSTERDAM.
ton, F.R.S.; Prof. Oliver Lodge, F.R.S. 608 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
Cockerell peptone of Kühne. Some years ago he argued there was not a Blind Animals in Caves.-G. A. Boulenger. 608 real difference between the substances called pept..ne, and the Observations in the West Indies. By Prof. A. substance called propeptone or hemialbumose. The researches Agassiz of Kühne and his disciples alterwards 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, saturated Nes
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616 stance which has the properties of albumo-e. 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
617 with Kühne that the substance called by him peptone is a sub- Institution of Mechanical Engineers stance sui generis, and not an impure albumo:e. -Mr. Bahhuis Coni'ers. By G. N. Roozeboom dealt with the cryohydrates in systems of two salis. The Earthquakes in Zante
620 Three cases are to be considered. The first is that the iwo salts Scientific Serials
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