i68 



NA TORE 



[June 17, 1897 



three methods, namely, from the loss of water of the hyd rated 

 sulphate at 250" (9270), from the ratio C3O4 : hydrated salt 

 (92;83), and from the ratio C3O4 : dry salt (92'87), the mean 

 result being about 927.— On the heat disengaged by the addition 

 of bromine to some unsaturated substances, by MM. W. Lou- 

 guinine and Iv. Kablukov. The unsaturated substances, for 

 which results are given, include allyl chloride, ethyl allyl ether, 

 allyl acetate, crotonic aldehyde, mesityl oxide and cinnamic 

 alcohol. — Combinations of phenylhydrazine with metallic bro- 

 mides, by M. J. Moitessier. Compounds of phenylhydrazine 

 with the bromides of zinc, cadmium and magnesium are de- 

 scribed.— On a menthoglycol, by MM. Ph. Barbier and G. 

 Leser.— Chemical study on the culture of Cattleya, by MM. 

 Alex. Hebert and G. Truffaut. — The use of aluminium vessels, 

 by M. Balland. A method of treatment is described which 

 permits of the rapid examination of aluminium water-flasks and 

 other vessels used for military purposes. — The bacteria of bog- 

 head cannel, by M. B. Renault. The presence in boghead coal 



of an extremely small micrococcus is proved, to the chief of 

 which the name Micrococcus petrolei is given. — Study of the 



rinfectious lesions of the bubonic plague, by M. Gustave Nepveu. 

 —Researches on the Ostioles, by M. J. J. Andeer. — On the 



' mechanical impossibility of the geometry of Lobatschewsky, by 

 M. Jules Andrade. 



DIARY OF SOCIETIES. 



THURSDAY, June 17. 

 ioYAL Society, at 4.30. — An B'xperimental Research upon Cerebro-Cortical 

 Afferent and Efferent Tracts : Prof. Ferrier. F.R.S., and Dr. Turner.— 

 On thfe Relative Behaviour of the H and K Lines of the Spectrum of 

 Calcium : Dr. and Mrs. Huggins. — (i) Further Observations of Enhanced 

 Lines. (2) The Total Solar Eclipse of August 9, 1896. Report on the 

 Expedition to Kio Island. (3) On the Classification of the Stars of the 

 6 Cephei Class : J. Norman Lockyer, F.R.S. — On the Action exerted by 



certain Metals and other Substances on a Photographic Plate : Dr. W. J. 

 Russell, F.R.S. — Stress and other Effects produced in Resin and in a 

 Viscid Compound of Resin .and Oil by Electrification : J. W. Swan, 

 F.R.S. — On Lunar and Solar Periodicities of Earthquakes : Prof. A. 

 Schuster, F.R S. — Kathode Rays and some Analogous Rays : Prof. S. P. 

 Thompson, F.R.S.— And other Papers. 



TjInnean Society, at 8. — On the Distribution of Primula elatior, Jacq. : 

 Miller Christy. — On the Acari collected by Mr. H. Fisher, Naturalist of 

 the Jackson-Harmsworth Polar Expedition, at Cape Flora, Northbrook 

 island, Franz-Josef Archipelago, in 1896: A. D. Michael. — Further Ob- 

 servations on Stipules: Sir John Lubbock, Bart., F.R.S. — On Minor 

 Tension Lines between Plant Formations : Prof. Conway Macmillan. 

 "^Chemical Society, at 8. — Ballot for the Election of Fellows. — The Re- 

 duction of Perthiocyanic Acid : F D. Chattaway and H. P. Stevens. — 

 Molecular Refraction of Dissolved Salts and Acids, Part IL: Dr. J. H. 

 Gladstone, F.R.S., and W. Hibbert.— On a Space Formula for Benzene : 

 Prof. J. Norman Collie, F.R.S. — On the Production of some Nitro- and 

 Amido-oxypicolines : Dr. A. Lapworth and Prof. J. Norman Collie, 

 F.R.S. — The so-called Hydrates of Lso-propyl Alcohol ; Dr. T. E. 

 Thorpe, F.R.S.— The Carbohydrates of the Cereal Straws : C. F. Cross, 

 E. J. Bevan, and C. Smith. — Further Experiments on the Absorption of 

 Moisture by Deliquescent Substances : H. Wilson Hake. 



MiN'ERALOGiCAL SOCIETY, at 8. — On Blodite from the Punjab: F. R. 

 Mallet. — On Monazite and Xenolirae in European Rocks : Orville A. 

 Derby.— On the Identity of Sundtite and Webnerite : G. T. Prior and 

 L. J. Spencer. 



FRIDAY, June i8. 



Royal Geographical Society, at 8.30.— Sub-Oceanic Changes : Prof. 

 John Milne, F.R.S. 



SATURDAY, June 19. 



^'Geologists' Association — Excursion to Leighton Buzzard. Director: 

 A. C. G. Cameron. Leave Euston, 9.10 a.m.; arrive Leighton, 10.47 a.m. 



MONDAY, June 21. 

 \Victoria Institute, at 4.30. 



TUESDA Y, June 22. 

 ■Royal Statistical Society, at 5. — Annual General Meeting. 



WEDNESDAY, June 23. 

 Geological Society, at 8. 



FRIDAY, June 25. 



Physical Society, at 5. — A New Theory of the Earth's Magnetism ; Mr. 



Sutherland. — Experiments in Critical Phenomena ; Dr. Kuenen. — On 



the Attenuation of Electric Waves in Wires : Dr. Barton. — On the Steady 



Motion of an Electrified Ellipsoid : G. F. C. Searle. 



SATURDAY, June 26. 

 Geologists' Association.— Excursion to Red Hill and Merstham (New 



Railway). Directors : Dr. G. J. Hinde, F.R.S., and W. Whitaker, 



F.R.S. Leave Cannon Street Station (S.E.R.)at 1.35 p.m. ; arrive at 



Red Hill, 2.21 p.m. 

 London Geological Field Class. — Excursion — Aylesford to Maidstone. 



Lower Greensand. Leave Cannon Street, 2.37 ; arrive Aylesford, 4.9. 



NO. 1442, VOL. 56] 



BOOKS, PAMPHLETS, and SERIALS RECEIVED. 



Books.— In Garden, Orchard and Spinney, Phil Robinson (Isbister).— 

 The Dolmens of Ireland : W. C. Borla.se, 3 Vols. (Chapman).— The Wood- 

 land Life : E. Thomas (Blackwood).— The Collected Mathematical Papers 

 of Arthur Cayley, Vol. xii. (Cambridge University Press). — Electro-Metal- 

 lurgie : A. Minet (Paris, Gauthier-Villars).— Grundprobleme der Natur- 

 wissenschaft : Dr. A. Wagner (Berlin, Gebruder Borntraeger).— Introduc- 

 tion to Philosophy : Prof. O. Kiilpe, translated by W. B. Pillsbury and E. 

 B. Titchener (Sonnenschein).— The Fertility of the Land: Prof. I. P. 

 Roberts (Macmillan).— Human Embryology: Prof. C. S. Minot (Mac- 

 millan).— The Psychology of the Emotions : Prof. Th. Ribot (Scott).— 

 Grundriss ,der Entwickelungsmechanik : W. Haacke (Leipzig, Georgi).— 

 Nouvelle Etude sur les Tempetes, &c. : H. Faye (Paris, Gauthier-Villars). 

 —Life in Early Britain : Prof. B. C. A. Windle (Nutt). 



Pamphlets — L'Ora Esatta Dappertutto: Dr. M. Rajna(Milano, Hoepli). 

 —On the Origin of the European Fauna : Dr. R. F. Scharff (Dublin, 

 Ponsonby). — Epistola; quas per Annos a 1596 ad 1601 : Tycho Brahe et 

 Oligerus Rosenkrantzius (Havniae). 



Serials.— Proceedings of the Physical Society of London, June (Taylor). 

 — Geographical Journal, June (Stanford).— Journal of the Asiatic Society 

 of Bengal, Vol. Ixv. Part 2, Nos. 3 and 4 ; and Part 3, No. i (Calcutta).— 

 American Journal of Science, June (New Haven).— Abhandlungen zur 

 Physiologie der Gesichtsempfindungen aus dem Physiologischen Institut zu 

 Freiburg i.B., Erstes Heft (Hamburg, Vos.s).— Aeronautical Journal, 1897. 

 No. 3 (Boston, Clarke) — Atti delta Fondazione Scientifica Ca^nola della 

 sua Istituzione in Poi, Vol. xiv. (Milano). — Memoire del R. Istituto Lom- 

 bardo di Scienze e Lettere, Vol. xx., xi. sella, serie iii. Fasc. 1-4 (Milano, 

 Hoepli).— Journal of the Chemical Society, June (Gurney).— Bulletin of the 

 American Mathematical Society, May (New York. Macmillan).— Himmel 

 und Erde, June (Berlin, Paetel).— Journal of the Fr.-uiklin Institute, June 

 (Philadelphia).— American Naturalist, June (Philadelphia).— Tiansactions 

 of the American Microscopical Society, Vol. xviii. (Buffalo, Brown).— 

 McClure's Magazine, June (New York, McClure). 



CONTENTS. PAGE 



Professor Klein and Technical Education in 



Germany. By Prof. O. Henrici, F.R.S 145 



A Well-known Text-Book of Chemistry. By M. M. 



Pattison Muir ... 147 



Philosophy and Philosophers. By H. W. B. . . . 149 



The Coral Reefs of Samoa. By J. W. G 150 



Our Book Shelf:— 



Evans and Pullen : " A Treatise on Practical Plane 



and Solid Geometry" 151 



Loppe : " Les Transformateurs de tension a courants 



alternatifs " , 151 



Dumont : /' Electromoteurs et leurs AppHcations " . 151 



Minet : "Electro-metallurgie" 151 



Long and Benson : " Cheese and Cheese-making" . 152 



" The Naturalist's Directory " 152 



Bell: " Flowering Plants " 152 



Collins : " Twelve Charts of the Tidal Streams near 

 the Channel Islands and Neighbouring French 



Coast" 152 



Scudder : " Guide to the Genera and Classification of 

 the North American Orthoptera found North of 



Mexico" 152 



Pearmain and Moor : " Aids to the Study of Bacteri- 

 ology" 152 



Letters to the Editor:— 



On a Method of reproducing Astronomical Photo- 

 graphs. [Illustrated.)--'Pvoi. K. D. Naegamvala 153 



On Mimicry.— Dr. Karl Jordan 153 



Immunity from Mosquito Bites. — Prof. Geo. C. 



Comstock 154 



Sound Signals in Fog.— Prof. Oliver J. Lodge, 



F.R.S 154 



Fire-fly Light.— Dr. E. Overton 154 



The Approaching Total Eclipse of the Sun. I. 



{Ilhtstraied.) By J. Norman Lockyer, C.B., F.R.S. 154 

 The Old Red Sandstone of Lome. By Sir 



Archibald Geikie, F.R.S 157 



International Congress on Technical Education . 158 



Alvan G. Clark 158 



Notes 159 



Our Astronomical Column: — 



New Southern Variable Stars 163 



The 1897 Maximum of Mira Ceti 163 



Comet Denning 1894 1 163 



Observations of Mars 163 



Signalling through Space without Wires. By W. 



H. Preece, C.B., F.R.S. . 163 



University and Educational Intelligence 164 



Societies and Academies 165 



Diary of Societies 168 



Books, Pamphlets, and Serials Received 168 



