Published the First Day of every Month.-Price 2s. 6d. THE LONDON, EDINBURGH, AND DUBLIN PHILOSOPHICAL MAGAZINE, AND JOURNAL OF SCIENCE. Being a Continuation of Tilloch's 'Philosophical Magazine,' Nicholson's 'Journal,' and Thomson's 'Annals of Philosophy.' CONDUCTED BY LORD KELVIN, LL.D. P.R.S. &c. GEORGE FRANCIS FITZGERALD, M.A. Sc.D. F.R.S. AND WILLIAM FRANCIS, PH.D. F.L.S. F.R.A.S. F.C.S. FIFTH SERIES. N° 229.-JUNE 1894. LONDON: PRINTED BY TAYLOR AND FRANCIS, RED LION COURT, FLEET STREET. Sold by Simpkin, Marshall, Hamilton, Kent, and Co., Ld.; Whittaker and Co.; and by A. and C. Black ;-T. and T. Clark, Edinburgh; Smith and Son, Glasgow:-Hodges, Figgis, and Co., Dublin :-Putnam, New York: - Veuve J. Boyveau, Paris:-and Asher and Co., Berlin. AERONAUTICS. BY G. BREWER AND P. Y. ALEXANDER. TAYLOR and FRANCIS, Red Lion Court, Fleet Street, E.C. Demy 8vo, price 18. THE OBSERVATORY, A MONTHLY REVIEW OF ASTRONOMY. H. H. TURNER, M.A., P.Sc., SEC. R.A.S., H. P. HOLLIS, B.A., F.R.A.S. TAYLOR and FRANCIS, Red Lion Court, Fleet Street, E.C. Price £7 10s. Od. TAYLOR'S SCIENTIFIC MEMOIRS. Selected from the Transactions of Foreign Academies of Science and Learned Societies, and from Foreign Journals. First Series, August 1836 to September 1852: 21 parts. New Series, Natural History: 4 parts. Natural Philosophy: 4 parts. A complete set of this valuable Work, containing memoirs by Arago, Balard, Becquerel, Berzelius, Bessel, Biot, Botto, Bunsen, Burmeister, Carus, Cauchy, Chevreul, Clausius, Clapeyron, Cruger, Danielssen, Dove, Ehrenberg, Emmerich, Encke, Fresnel, Gauss, Goldschmidt, Hansen, Helmholtz, Henry, Hoffmann, Hoffmeister, Holtzmann, Jacobi, Jamin, Knoblauch, Koene, Koren, Krohn, Lamont, Lenz, Le Verrier, Liebig, Löwig, Magnus, Melloni, Menabrea, Meyen, Mitscherlich, Mohl, Moser, Mossotti, Müller, Neumann, Nobili, Ohm, Ostrogradsky, Pelouze, Peltier, Plateau, Plücker, Poggendorff, Poisson, Pouillet, Provostaye, Redtenbacher, Regnault, Riess, Römer, Rose, Rudberg, Savart, Schleiden, Schmidt, Schultess, Seebeck, Sefström, Senarmont, Siebold, Verany, Vogt, Von Baer, Von Wrede, Walckenaer, Wartman, Wichura, Wiedemann, Weber. TAYLOR and FRANCIS, Red Lion Court, Fleet Street, E.C. Pp. xi, 361; Demy 8vo. With 2 Plates and 65 Woodcuts. Price 10s. TELESCOPIC WORK FOR STARLIGHT EVENINGS. BY WILLIAM F. DENNING, F.R.A.S. (Formerly President of the Liverpool Astronomical Society.) This work is intended as a useful companion for amateur observers, and contains many facts and references likely to stimulate their interest in the sublime science of Astronomy. Chapters are given on the Invention of the Telescope, on Large and Small Telescopes, and copious notes on Telescopic work. Then follow descriptions of the Sun, Moon, Planets, Comets, Meteors, Stars, and Nebulæ. The methods and requirements of modern observation are alluded to, and the information has been carefully brought up to date. TAYLOR and FRANCIS, Red Lion Court, Fleet Street, E.C. THE LONDON, EDINBURGH, AND DUBLIN PHILOSOPHICAL MAGAZINE AND JOURNAL OF A JOURNAL DEVOTED TO PHYSICS, ASTRONOMY, MECHANICS, CHEMISTRY, MINERALOGY, AND THE ALLIED SCIENCES. MONTHLY, PRICE 2s. 6d. Complete sets (in Numbers) may be obtained at the following prices: Price £2 48. The First Series, in 68 volumes, from 1798 to 1826. A few copies only TAYLOR and FRANCIS, Red Lion Court, Fleet Street. £6. £25. THE ANNALS AND MAGAZINE OF NATURAL HISTORY, INCLUDING ZOOLOGY, BOTANY, AND GEOLOGY. MONTHLY, PRICE 2s. 6d. Complete sets (in Numbers) may be obtained at the following prices: The First Series, in 20 volumes, from 1838 to 1847. Price £10. £10. £12. 99 TAYLOR and FRANCIS, Red Lion Court, Fleet Street. CONTENTS OF No 229.-Fifth Series. LII. On Interference Phenomena. By Prof. ARTHUR SCHUSTER, LIV. The Minimum Temperature of Visibility. By P. L. GRAY, B.Sc., Assoc. R.C.S., Lecturer in Physics, Mason College, Bir- LV. New Method of Determining the Relative Affinities of certain LVI. On the Design and Winding of Alternate-Current Electro- LVII. The Second Law of Thermodynamics. By S. H. BUR- LVIII. Notices respecting New Books:-Mr. WORTHINGTON G. SMITH'S Man, the Primeval Savage: his Haunts and Relics, from On the Magnetization of Iron and Nickel Wire by Rapid Electrical Oscillations, by Prof. I. Klemenčič It is requested that all Communications for this Work may be addressed, |