1 20 



NA TORE 



[June 2, 1892 



sii'ution of TI by a haloid increases the thermal value of the acid 

 function. — Alcohols superior to vinyl alcohol, by M. C. Bardy. 

 — Action of esters of unsaturate! acids on ethyl sodium cyan- 

 acetate, by M P. Th. Muller.— On a tetramethyl-nieta-diamido- 

 henzidine, by M. Charles Lanth. — On the embryology of a 

 Proneomenia, by M. G. Pruvot. — Researches on the general 

 civity and excretory apparatus of Cirrhipedes, by M. Koehler. — 

 Anatomical study of the secondary wood of certain apetalons, 

 by M. C. Houlbert — On the relations of the Trias in the south- 

 ea-t Paris basin, by M. A. de Gros«ouvre. — Vaiiaiions in the 

 mean temperature of the air in the region of Paris, by M. E. 

 Rt-nou. — On a natural ice-cave at Creux- Perce (Gold Coast), by 

 M. E. A. Martel. 



Berlin. 



Meteorological Society, May 3. — Prof, von Bezold, Pre- 

 sident, in the chair. — Dr. Schwalbe gave an account of observa- 

 tions on the extent and spread of anomalies of temperature in 

 Germany based on synoptic weather-charts. He showed that 

 the weather-types introduced by Teisserenc de Sort hold good 

 for Germany, especially in winter, and that, as a result of the 

 varying di-irihution of barometric pressure, they are the cause 

 of very marked differences of temperature between the north 

 and south, the east and west. These types are less frequently 

 observed in summer, although both then and in the spring 

 certain very marled distributions of pressure exist. — Prof. Sporer 

 spoke on the recent magnetic storm of April 25, for which, as 

 al'O for the great storms of Felruary 13 and 14, he had been 

 unable to discover any corresponding phenomena in the sun- 

 spots at the same dates. 



DIARY OF SOCIETIES. 



London. 



THURSDA V, June 2. 



RovAL SociBTV, at 4. — Election of Kellowi. At 4.;o. — On the Method 



of Examination of Photographic Otjectives at the Kew Observatory: 

 Major Darwin. — Supplementary Report on Explorations of Erect Trees 

 containing Animal Remains in the Coal Formation of Nova Scotia : Sir J. 

 W, Daw.son, F.R.S.— The-Hippocampus : Dr. A. Hill.— On a New Form 

 of Air-I.eyden, with Application to the Measurement of Small Electro- 

 static Capacities: Lord Kelvin, P.R.S. — On Certain Ternary Alloys; 

 Part VI.. Alloys containing Aluminium, together with Lead (or Bis'iiuth) 

 and Tin (or Silver): I Jr. Wright, F.R.S.-The Conditions of the Forma- 

 tion and Decompositi' n of Nitrous Acid: V. H. Veley. — On the Theory 

 of Electrodynamics as affected by the Nature of the Mechanical Stresses 

 in Excited Dielectrics: Dr. J. Larmor. — On Current Curves: Major 

 Hippisley. 



LiNNEAN Society, at 8. — On the Disappearance of Desert Plants in 

 Egypt : E. A. Floyer, —On Insect Colours : F. H. Perry Coste.— Lantern 

 Demonstration. 



Chrmical Society, at 8. — Ethylene Derivatives of Diazo-Amido Coin- 

 piunds: R. Meldola, F.R.S., and F. W. Streatfield. 



Ro.AL Institution, at 3. — Faust : R. G. Moulton. 



FRIDA V, June 3. 

 'Geologists' Association, at 8. 

 Roval Institution, at 9. — Metallic Carbonyls : Ludwig Mond, F.R.S. 



SATURDAY, June 4. 

 Royal Institution, 313. — Some Modern Disroveries in Agricultural and 

 Forest Botany ; Prof. H. Marshall Ward, F.R.S. 



TUESDA y, June 7. 

 Roval Institution, at 3.— Some Aspects of Greek Poetry: Prof. R. 

 C. Jebb, M.P. 



WEDNESDAY, June 8. 

 Geological Society, at 8. — The Tertiary Microzoic Formations of 

 Trinidad : R. J. Lechmere Guppv. (Communicated by Dr. H. Wood- 

 ward, F.K.S.)— The Bagshot B^ds of Bagshot Heath (a Rejoinder) : Rev. 

 A. Irving.— Notes on the Geo! gy of the Nile Valley : Johnsjn Pasha and 

 H. D. Richmond. (Communicated by A. Norman Tate.) 



THURSDAY, June 9. 

 Mathematical Society, at 8.— On the Reflection and Refraction of 



Light from a Magnetized Transparent Medium: A. B. Basset, F.R.S. 

 Royal Institution, at 3.— Faust : R. G. Moulton. 



FRIDAY, June ij. 

 f'HVsicAL Society, at s- — Some Points connected with the Electromotive 



Force of Secondary Batteries: Dr J. H. Gladstone and Mr. Hibbert. — 



Workshop Ballistic and other Shielded Galvanometers : Prof. W. E. 



Ayrtm and Mr. Mather. 

 HdVAL Astronomical Society, at 8. 

 RovAL Institution, at 9. — Magnetic Properties of Liquid Oxygen: 



Prof. Dewar, F.R.S. 



SATURDAY, June ii. 

 K )VAi Botanic Society, at 3.45. 

 KovAL Institution, at 3.— Some Modern Discoveries in Agricultural and 



Forest Botany : Prof. H. Marshall Ward, F.R.S. 



NO. I I 79, VOL. 46] 



BOOKS, PAMPHLETS, and SERIALS RECEIVED. 



Boo K.S.— Theoretical Mechanics : J. Spencer (Percival).— The First Part 

 ofCoethe's Faust, carefully revised, with Intioduction by C. A. Buchheim 

 (Bell). — Influfnza, 2nd edition : Dr. J. Althaus (Longman'.). — The Physio- 

 logy of the Invertebrata : Dr. \. B. Griffiths (L Reeve). — Annual Report 

 "t the Smithsonian Institution to July 1890 (Washington). — Le.ssons in 

 Elementary Mechanics, new edition: Sir P._ Maijnus (Longman.s). — 

 Elements of I'hysi's: (j. E. Fessenden (Macmillan and Co.). — An Ele- 

 mentary Course in Theory of Equations : C. H. Chapman (Gay and Bird). 

 — A Text-book in Retaining Walls and Masonry Dams: M. Merriman 

 (Ga^ and Bird). — A Treatise on the Mathernalical Theory of Elasticity, 

 vol. i. : A. E. H. Love (Cambridge University Press). — Der Peloponnes, 

 Ab eilting ii. : Dr. A. Philippson (Berlin, Fnedlander). — Topographische 

 und Hypsomeirische Karte des Peloponnes: Dr. A. Philipp-;' n (Berlin, 

 FriedlandeO — The System of Mineralogy of J. D. Dana, 1837-68; De- 

 fer. ptivi Mineralogy, 6ih edition: E. S. Dana (Kegan Paul). — Die 

 Tagliche Gang der Temperatur und des Sonnenscheins auf dem Sonnblick- 

 gipfel : Dr. W Trabert (Wien, Tempsky). — Bacteriologisches Practicum : 

 Dr. W. Migula (Karlsruhe, O. Nemnich).— In Starry Realms: Sir R. S. 

 Ball (Isbister).— A Hand-book of the Management of Animals in Captivity 

 in Lower Bengal, Ram Bramha Sanyal (Calcutta). — Mineralogy : Dr. F. 

 H. Hatch (Whitlaker) — D&rwin and after Darwin ; I. The Darwinian 

 Theory: Dr. G. J. Romanes (Longmans). — Animal Coloration: F. E. 

 Beddard (Sonnenschein). — The Discovery of America, 2 vols. : J. Fiske 

 (Macmillan and Co.). — A Text-book of Geometrical Deductions: J. 

 Blaikie and W. Thomson (Longmans). — Distinction and the Criticism of 

 Beliefs: A. Sidg wick (Longmans). — Solutions of the Examplesin a Treatise 

 on Elementary Dynamics : S. L. Loney (Cambridge University Press). — 

 Theoretical Mechanics, Division I. : J. C. Horobin (Bell). — A lland-book 

 of Practical Astronomy ; W. W. Campbell (Ann Arbor, Michigan, Register 

 Publishing Company). — Logarithmic and other Mathematical Tables, 2nd 

 edition : W. J. Hussey (Ann Arbor, Michigan, Register Publishing 

 Company). — The Universal Atlas, Part i5(Cassell). — Life in Motion: Prof 

 J. G. McKendrick (Black). -An Elementary Text-book of Magnetism and 

 Electricity; R. W. Stewart (Clive). - The Two Spheres of Truth: 

 T. E. S. T. (Unwin).— The Essentials of Histology, 3rd edition : Prof E. 

 A. Schafer(Longnians).— Planisphere for Latitudes 68° to 48°, and Key to 

 Planets until 1901 ; M. W, Harrington (.\nn Arbor, Michigan, Re^^ister 

 Publishing Company). — The Optical Indicatrix and the Transmission of 

 Light in Crystals; L. Fletcher (Frov.de). — Tasmanian Official Record, 

 1892 (Hobart). 



Pamphlet.— The Rutherfurd Photographic Measures of the Group of the 

 Pleiades ; H. lacoby (New York). 



Sei-ials. — Bulletin of the New York Mathematical Society, vol. i. No. 8 

 (New York). — Bulletin de la Soci6t6 Imp^riale des Naturalistes de Moscou, 

 No. 4 (Moscou). — Zeitschrift fiir Wissenschaftliche Zoologie, liii. Band, 

 Supplement (Williams and Norgate).— Natural Science, June (Macmillan 

 and Co.). — Annalen des k.k. Naturhistorischen Hofmuseums, Band vii. 

 Nr. I u. 2 (Wien, Holder).— Proceedings of the Royal Pljsical Society, 

 Session 1890-91 (EdinbnrghV — Internationales Archiv fiir Ethnographic, 

 Band v. Htft 2 (Leiden, Trap). 



CONTENTS. PAGE 



The Grammar of Science. By C. G. K 97 



The Teaching of the Principles of Chemistry. By 



W. A. T 99 



Our Book Shelf:— 



Dawson and Sutherland : " Elementary Geography of 



the British Colonies" 100 



Aikman : " Farmyard Manure " 100 



Letters to the Editor : — 



Peripatus from St. Vincent. — R. I. Pocock .... 100 

 The Line Spectra of the Elements. — Prof. C. 



Runge 100 



Maxwell's Law of Distribution*of Energy. — Rev. H. 

 W. Watson, F.R.S., and S. H. Burbury, 



F.R.S too 



The Former Connection of Southern Continents. — 



Prof. J. P. O'Reilly loi 



On the Relative Densities of Hydrogen and Oxygen. 



{Illustrated.) By Lord Rayleigh, Sec.R.S. ... loi 

 The Origin of the Year. II. {Illustrated.) By J. 



Norman Lockyer, F.R.S 104 



Notes 107 



Our Astronomical Column: — 



Winnecke's Periodic Comet no 



Saturn's Rings uo 



Geographical Notes no 



The Iron and Steel Institute ni 



The Yearly Admissions to the Royal Society. By 



Lieut. -General R. Strachey, R.E., F.R.S 116 



The Eruptions of Vulcano (August 3, 1888, to March 



22, 1890). By G. W. Butler n? 



Societies and Academies 119 



Diary of Societies 120 



Books, Pamphlets, and Serials Received 120 



