312 



NA rURE 



[January ig, 1905 



MM. Rambaud and Sy. — Orogenic sketch of the chains 

 of the Atlas mountains to the north-west of Chott el 

 Hodna : M. Savornin. — On the existence and the 

 abnormal tectonic situation of the Eocene deposits in New 

 •Caledonia: J. Deprat and M. Piroutet. — Geological 

 •observations collected by the Chari — Lake Chad expedi- 

 tion : H. Courtet. — Contribution to the chemical study 

 -of the soil, water, and mineral products of the region of 

 ■Chari and of Lake Chad : Alex. Hebert. — On the spring 

 .at Hamniam Moussa, near Tor, Sinai : R. Fourtau and 

 K. Georgiades. The water from this spring approxi- 

 mates to the water at Wiesbaden, containing sodium 

 chloride and the sulphates of lime and magnesia. It has 

 a slightly acid reaction. — Man and the mammoth at the 

 Quaternary period in the soil of the Rue de Rennes, south 

 of Saint-Germain-des-Pr^s : M. Capitan. Excavations in 

 this district have led to the discovery in the Quaternary 

 strata of several roughly executed flint heads and a well 

 preserved tooth of the mammoth. It follows from this 

 and previous discoveries that man, the elephant and the 

 rhinoceros lived in the Seine valley, on the actual spot 

 where Paris now stands. — Chlorophyll assimilation in the 

 absence of oxygen : Jean Friedel. It is shown that the 

 presence of oxygen in the atmosphere surrounding the leaf 

 is not indispensable for the process of assimilation. — A 

 gum bearing Stereospermum in Madagascar : Henri 

 Jumelle. — The physiological effects of ovariotomy in the 

 goat : P. Oceanu and A. Babes. Amongst the 

 advantages of this operation in the goat are the disappear- 

 ance of the characteristic smell of the milk, an increased 

 secretion of the milk, and prolongation of the lacteal 

 period. 



DIARY OF SOCIETIES. 



THURSDAY, Januarv 26. 



RovAL Society, at 4.30—011 the Boring of the Simplon Tunnel, and 

 the Distribution of Temperature that was Encountered : F. Fox. — 

 On the Comparison of the Platinum Scale of Temperature with the 

 Normal Scale at Temperatures between 444° and - 190" C, with Notes on 

 Constant Temperatures below the Melling Point of Ice : Prof M. W. 

 Traver.s, F.R.S., and A. S. C. Gwyer.— On the Modulus of Torsional 

 Rigidity of Quartz Fibres, and its Temperature Coefficient : Dr. K. Hor- 

 ion.— On a Method of Finding the Conductivity for Heat ; Prof. 

 C. Niven, F.R.S.— On the Drift produced in Inns by Electro- 

 magnetic Disturbances, and a Theory of Radio-activity : G. W. Walker 

 — Kxterior Ballistics. "Error of the Day" and other Corrections 

 to Naval Range Tables: Prof. G. Forbes, F.R.S.— The Theory of 

 Symmetrical Optical Objectives. Part ii. : S. D. Chalmers.— Coloration 

 of Glass by Natural Solar and other Radiations : Sir William Crookes, 

 F.R.S.— Note on the Cause ol the Period of Chemical Induction in the 

 Union of Hydrogen and Chlorine : C. H. Burgess and D. L. Chapman. 



Institution of Electrical Engineer-^, at 8. — Fuel Economy in Steam 

 Power Plants : W. H. Booth and J. B. C. Kershaw. (Conclusion of 

 discussion.) 



FRIDAY. January 27. 



RnvAL Institution, at 9. — The Life-History of the Emperor Penguin ; 

 Dr. Edward A. Wilson. 



Physical Society, at 5.— Action of a Magnetic Field on the Discharge 

 through a Gas : Dr. R. S. vvillows.— Action of Radium on the Electric 

 Spark : Dr. R. S Willows and J. Peck.— The Slow Stretch in India- 

 rubber, Glass, and Metal Wires when subjected to a Constant Pull : 

 P. Phillips.-Determination of Young's Modulus for Glass: C. A. Bell. 

 —Some Methods for Studying the Viscosity of Solids : Dr. Boris 

 Weinberg. 



Institution of Civil Engineers, at 8. — Concrete-Making on the 

 Admiralty Harbour Works, Dover: T. L. Matthews. 

 SATURDAY, January 28. 



Mathematical Association, at -^. — Models and their Use : E. M. Lang, 

 ley.— The New Geometry : W. H. WagstafT.- Should Greek be Com- 

 pulsory for Mathematicians at Cambridge? A. W. Siddons. 



Essex Field Club (at Essex Museum of Natural History, Stratford), 

 at 6.30.— On the Occurrence of Gypsum in Essex Soils : T. S. Dymond 

 — The Bog-Mosses (Sphagnaceae) of Essex, a Contribution to the Flora 

 of the County : F. J. Chittenden. 



MONDAY, January 30. 



Society of Arts, at 8. — Reservoir, Stylographic and Fountain Pens: 

 J. P. Maginnis. 



Institute of Actuaries, at 5.— On Staff Pension Funds : G. King. 



Fakaday Society, at 8.— Mass Analyses of Muntz's Metal by Electro- 

 lysis, and some Notes on the Electrolytic Properties of this Alloy ; 

 J. G. A. Rhndin.— On the Equilibrium between Sodium and Magnesium 

 Sulphates: Dr. R Beckett Denison.—" Refractory Materials": E. K. 

 Scott. 



TUESDAY, January 31. 



RovAL Institution, at 5. — The Structure and Life of Animals: Prof. 

 L. C. Miall, F.R.S. 



Institution of Civil Engineers, at 3.— Floating Docks : L. E. Clark. 



MINERALOGICAL SOCIETY, at 8. -(i) On Danalite from Cornwall: (2) 

 Crystalloeraphic C:haracters of Barium-r.-»dium Bromide : Prof. H. A. 

 Mier.., F.R.S. -On the Regular Growth of Crystals of one Substance 

 upon Tho'e of Another: T. V. Barker.- Apparatus for Determining the 

 Density of Small Grains: K. A. K. Hallowes. 



NO. 1839, VOL. 71] 



IVEDNESDAY, February i. 



Geological Society, at 8. — On the Sporargia-like Organs of Glossopteris 

 Bmvniana, Brongn. : E. A. Newell Arber. 



Society of Public Analysts, at 8.-The Volumetric Estimation of 

 Reducing Sugars : A. R. Ling and T. Rendle.— The Inversion of Cane 

 Sugar in the presence of Milk Constituents : Hon. Francis Watts —The 

 Colorimetric Estimation of Salicylic Acid in Food Stuffs : F. T. Harry 

 and W. R. Mummery. 



Society of Arts, at 8.— The Navigation of the Nile: Sir William H. 

 Preece, K.C.E. 



THURSO A Y, February 2. 



Royal Society, at i^.->,o.— Probable Papers: On the Compressibility ol 

 Gases between One Atmosphere and Half an Atmosphere of Pressure : 

 Lord Rayleigh, O.M., F.R S — On the " Blaze Currents " of the Gall 

 Bladder of the Frog : Mrs. A. M. Waller :— The Theory of Photographic 

 Processes ; on the Chemical Dynamics of Development : S. E. Sheppard 

 and C. E. K. Mees —On the Relation between Variation of Atmospheric 

 Pressure in North-East Africa, and the Nile Flood : Capt H. G. Lyons. 

 —Note on the Determination of the Volume Klasticity of Elastic Solids : 

 Dr. C. Chree F.R.S.— Theory of the Reflection of Light near the 

 Polarising Angle : R. C. Maclaurin. 



R 'YAL Institution, at 5. — Forestry in the British Empire: Prof. 

 W. Schlich. 



Civil and Mechanical Engineers' Society, at 8.— The Mechanics of 

 Flour Milling : A. R. Tattersall. 



LiNNEAN Society, at 8.— New Chinese Plants from the Neighbourhood 

 of Hong Kong : W. J. Tutcher— European Marine Species of Isopoda : 

 Dr. H. J. Hansen. 



RoNTGtN Society, at 8 15. — Some Points in the Construction of a High 

 Frequency Machine: Dr. Clarence A. Wright. 



Chemical Society, at 8.— Studies in the Camphane Series. Part xvi. 

 Camphorylcarbimide and Isomeric Camphorylcarbamides : M. O. Forsler 

 and H. E. Fierz. 



FRIDAY, Februarys. 



Royal Institution, at 0.— Blood Pressure in Man : Prof. T. Clifford 

 Allbuit, F.R.S. 



Geologists' Association, at 7.30.— Address on Modern Methods in the 

 Study of Fossils : the President, Dr. A. Smith Woodward, F.R.S. 



CONTENTS. PAGE 



A Monograph of the Heliozoa. By E. A. M. ... 289 



Trees 290 



Advances in Physical Science. By T. M. L. ... 291 



The Cyanide Process. By T. K. R 292 



Our Book Shelf :— 



Horner: " Fireside Astronomy " 292 



"Observations oceanographiques et meteorologiques 



dans la Region du Courant de Guinee (1855-1900)" 293 

 *'Opere matematiche di Francesco Brioschi " ; 



'• Opere matematiche di Eugenio Beltrami " . . . 293 



"The Science Year Book for 1905" 293 



Letters to the Editor :— 



The Origin of Radium.--Frederick Soddy .... 294 

 A New Radio-active Product from Actinium. — Dr. T. 



Godlewski 294 



A Simple Model for Illustrating Wave-motion. 



(IHiisiraled.)—K. Honda 295 



Recently Observed Satellites. — Sir Oliver Lodge, 



F.R.S 295 



Compulsory Greek at Cambridge. — Edward T. 



Dixon 295 



Super-cooled Rain Drops. — Edward E. Robinson . 295 

 Polar Plotting Paper.— ( f^/M Diugram.) Dr. C. G. 



Knott . . 296 



Lissajous's Figures by Tank Oscillation. — {Illustrated. ) 



T. Terada 296 



Notes on Stonehenge. I. {lllustraled.) By Sir 



Norman Lockyer, K.C.B., F.R.S 297 



Prof. Ernst Abbe. By R. T. G 301 



M. Paul Henri. By W. E. P 302 



Notes 302 



Our Astronomical Column: — 



The Reported Sixth Satellite of Jupiler 306 



Periodical Cornels due to Return in 1905 .' 306 



Changes on the Surface of Jupiler 306 



Stars having Peculiar Spectra , . . 306 



Real Paths, Heights, and Velocities of Leonids . . . 306 

 New Method for Measuring Radial-velocity Spectro- 

 grams 306 



Medical Research in Egypt 307 



Wireless Telegraphy in War. By M. S 307 



Floods in the United States. (Illustralcd.) . . .308 



Seismological Notes 30S 



University and Educational Intelligence 309 



Societies and Academies 310 



Diary of Societies 312 



