PARIS. Academy of Sciences, October 16.-M. Troost in the chair. On the absolute desiccation of vegetable products: L. Maquenne. It is commonly assumed that when a substance has been heated in an air oven at 100° C. to 120° C. until its weight becomes constant, all the moisture has been driven off. The author shows that this is not the case for substances such as starch and flour. For complete drying, either a current of well dried gas must be passed over the starch at about 120° C., or it must be sealed up in a vacuum with a dehydrating agent for a long period.-Presentation of the twelfth volume of the Mémorial du Dépôt général de la Guerre": Bouquet de la Grye. This volume includes the measurements of the new meridian of France from the bases of Paris, Perpignan, and Cassel. Attention is directed to the accuracy of the results obtained.-Preliminary note on the observation of the total solar eclipse of August 30 made at Guelma: MM. Bourget and Montangerand. Fifteen photographs were obtained during totality, different coloured screens being interposed. The plates are all good, and show excellent images of the corona and protuberances. -Observations on the total eclipse of the sun of August 30: J. Comas Solá. The observations, which were made at Vinaroz, included three photographs of the corona and of the spectra of the chromosphere.-On functions having a finite number of branches: Georges Rémoundos.—On the calculation of an arch in masonry: M. Auric.-On a phenomenon of cooling observed in silver wires plunged into water and through which electric currents are passing: E. Rogovsky. It is shown that the resistance of the wire depends on the magnitude of the current passing through it, this effect being due to the fact that all parts of the wire are not, under these conditions, at the same temperature. It is necessary, to obtain exact values of the resistance of wires in a liquid at the temperature of this liquid, to extrapolate from a series of observations made with different intensities of current.-On the forms of lightning conductors: G. M. Stanoïévitch.-The basic character of pyranic oxygen. Halogen compounds of dinaphthopyryl with metals and metalloids: R. Fosse and L. Lesage. C10H6 The radical dinaphthopyryl, -CH CO, although not C10H6 containing nitrogen, forms a large number of double salts, examples of which with platinum, lead, iron, zinc, tin, bismuth, arsenic, and antimony are given in the present note. On the development of amylase during the germination of seeds: Jean Effront. The sugar-forming and liquefying powers of malt do not develop at the same rate during germination, the former being the more rapid and reaching a maximum, whilst the latter steadily increases with the time of germination.-The measurement of the mechanical work obtainable from Limousin cattle: M. Ringelmann.-On a new flagellated parasite of Bombyx mori (Herpetomonas bombycis): C. Levaditi. NEW SOUTH WALES. Royal Society, September 6.—Mr. H. A. Lenehan, president, in the chair.-Reinforced concrete, paper iii.: Prof. W. H. Warren. The following matters were dealt with :(a) The adhesion of cement mortar and concrete to steel. (b) The experimental determination of the neutral axis in a plain concrete, and also in a reinforced concrete beam, and the curves of strain for loads increasing from zero to the load producing fracture; the determination of the true form of the stress curve from the actual strain curve in a plain and in a reinforced concrete beam. (c) The safe working stresses and the fundamental equations recommended for the design of reinforced concrete structure.The occurrence of inclusions of basic plutonic rocks in a dyke near Kiama: C. A. Sussmilch. ENTOMOLOGICAL SOCIETY, at 8. SOCIETY OF PUBLIC ANALYSTS, at 8.-(1) A Rapid Method for the Deter mination of Tin in Copper-Tin Alloy; (2) Water from the Simpl Tunnel: A. G. Levy.-Notes on (1) Dika Oil; (2) Surn Fat: J Lewkowitsch.-The Determination of Oxygen in Copper: L. Archbutt THURSDAY, NOVEMBER 2. CHEMICAL SOCIETY, at 8.30.-Solution and Pseudo-solution, part iv, Some of the Arsenious Properties of Arsenious Sulphide and Ferric Hydrate: E. Linder and H. Picton.-The Molecular Conductivity Water: P. Blackman.-The Stereoisomerism of Substituted Ammorum Compounds H. O. Jones.-The Influence of very Strong Electr magnetic Fields on the Spark Spectra of Ruthenium, Rhodium, anc Palladium; J. E. Purvis.-Note on the Fluorides of Selenium and Tellurium: E. B. R. Prideaux.-The Constitution of Glutaconic Add: JF. Thorpe.-Some Alkyl Derivatives of Glutaconic Acid and of 2.6Dioxypyridine: H. Baron and J. F. Thorpe.-Note on the Formation of B-Methylglutaconic Acid and of aß-Dimethylglutaconic Acid: F. V Darbishire and J. F. Thorpe. LINNEAN SOCIETY, at 8.-Plant Ecology, interpreted by Direct Response to the Conditions of Life: Rev. G. Henslow. RÖNTGEN SOCIETY, at 8.15.-The Ruhmkorff Coil: Prof. Wertheim Salomonson. CIVIL AND MECHANICAL ENGINEERS' SOCIETY, at 8.-Sea Defences: Baron H. T. H. Siccama. Star with a Large Proper Motion Mathematical and Physical Science at the British The Recent Large Sun-spot. (Illustrated.) Further Results of the French Eclipse Expeditions Nova Aquile No. 2. 640 040 640 642 By Dr. George 643 The Mechanics of the Ascent of Sap in Trees. By Prof. J. Larmor, F.R.S. 644 Experiments with the Langley Aerodrome. (lmstrated.) By Dr. S. P. Langley. 645 University and Educational Intelligence Societies and Academies 640 04 Diary of Societies. "No. 2" SPECTROMETER. (Diameter of Circle = 8") The Rotation of the Prism Table and of the Telescope are both read by Vernier on a Platinoid Circle to 30 seconds. ADAM HILGER, Ltd., 75a Camden Road, London, N.W. Telegraphic Address:-"Sphericity, London." AWARDED GOLD MEDAL ST. LOUIS EXHIBITION, 1904. ILLUSTRATED LIST ("A") OF SPECTROSCOPES AND SPECTROSCOPIC ACCESSORIES CRATIS ON APPLICATION. ANDREWS' AWARDED MEDALS WHEREVER EXHIBITED, including 9 at the great Paris Exposition of 1900. AUTOMATIC VACUUM JAS. J. HICKS, REGULATOR. Meteorological and Scientific Instruments OF EVERY DESCRIPTION, INCLUDING STANDARD MERCURIAL BAROMETERS, Air Meters, Anemometers, Boiling Point Apparatus, Catalogues Post Free. (State which required.) Prompt Attention to all Orders and Inquiries. Exceptional Terms to Colleges, Institutions, &c. Quotations submitted for Laboratory Outfits or Single Instruments. 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This apparatus has been already installed by many of the chief workers in Electro Therape:: in France and England, and is giving the very best results (vide testimonials). Replaces large Induction Coils in Laboratory and Research Work requiring High Electric Tensions or Electric Oscillations of great power and uniformity Descriptive Pamphlet gratis on application from the Sole Agents for Great Britai and its Colonies THE MEDICAL SUPPLY ASSOCIATION. 228 Gray's Inn Road, London, W.C., may be seen working. where the apparatus CROSSLEY'S GAS ENGINES RECENTLY REMODELLED. Represents K and L types, giving 3.5 H.P. and 5 H.P respectively. Immediate Delivery for Stock Sizes of Engines. GREAT REDUCTION IN GAS CONSUMED. Up to the end of 1904. over 51,000 gas and oil engines had been delivered, representing about threequarters of a million actual horse-power. OPENSHAW, MANCHESTER PUBLISHED. Price List of Electro- Therapeutical and W. WATSON & SONS, 313 Established 1837. 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Owing to the use of wood instead of metal, wherever possible, this camera is lighter than many of less substantial make. EACH SIZE PERMITS OF THE USE OF THE SINGLE COMPONENTS OF A STIGMATIC OR OTHER CONVERTIBLE LENS. PRICE, including 3 Double Slides, but j 4 by 31. 6 by 41. 15s. 6d. £7 15s. Od. without Lens or Shutter. 1 £5 5 by 4. J. H. DALLMEYER, Ltd., 25 NEWMAN ST., OXFORD ST., LONDON, W. MAKERS OF THE CELEBRATED DALLMEYER LENSES. Printed by RICHARD CLAY AND SONS, LIMITED, at 7 & 8 Bread Street Hill, Queen Victoria Street, in the City of London, and published by MACMIT LAS AND CO., LIMITED, at St. Martin's Street, London, W.C., and THE MACMILLAN COMPANY, C6 Fifth Avenue, New York. - THURSDAY, October 26 1905 |