45 6 



NA TURE 



[March 12, 1903 



• — The dinosaurs of Belgium, by M, Louis Dollo. — A bio- 

 logical study of parasitism ; Ustilago Maydis, by M. Julien 

 Ray.— On the geology of the Montagne des Fran^ais 

 (Madagascar), by M. Paul Lemoine. — On subterranean 

 waters and the disappearance of springs, by M. E. A. 

 Martet. — On geographical explorations carried out in the 

 Tchad region, by M. Destenave. 



DIARY OF SOCIETIES. 



THURSDAY, March t 2 . 



Royal Society, at 4 30. — On the Histology of Uredo dispersa, 

 Erikks., and the '* Mycoplasm " Hypothesis : Prof. Marshall Ward, 

 F.R.S.— The Statolith Theory of Geotropism : F. Darwin, F.R.S. 

 — A Study of a Unicellular Green Alga, occurring in Polluted Water, 

 with Especial Reference to its Nitrogenous Metabolism : Miss H. 

 Chick. — A Comparative Study of the Grey and White Matter of the 

 Motor Cell Groups and of the Spinal Accessory Nerve in the Spinal 

 Cord of the Porpoi-e {Pkocaena communis)'. Dr. I». Hepburn and Dr. 

 D. Waterston.— The Oestrous Cycle and the Formation of the Corpus 

 Luteum in the Sheep: F. H. A. Marshall. — On the Culture of the 

 Nitroso-bacterium : H. S. Fremlin. — Upon the Immunising Effects of 

 the Intracellular Contents of the Typhoid Bacillus as Obtained by the Dis- 

 integration of the Organism at the Temperature of Liquid Air : Dr. A. 

 Macfadyen. 



Royal Institution, at 5. — In-ect Contrivances: Prof. L. C. Mtall, 

 F.R.S. 



Institution of Electrical Engineers, at 8. — Distribution Losses in 

 Electric Supply Systems : A. D. Constable and E. Fawssett. — A Study 

 of the Phenomenon of Resonance in Electric Circuits by the Aid of 

 Oscillograms (.abstract) : M. B. Field. 



Society of Arts, at 4.30. — The Currency Policy of India : J. Barr 

 Robertson. 



Mathematical Society, at 5.30. — On the Convergence of Certain 

 Multiple Series : G- H. Hardy — On the Representation of a Group of 

 Finite Order as an Irreducible Group of Linear Substitutions and the 

 Direct Establishment of the Relations between the Group-Character- 

 istics : Prof. W. Burnside. — Approximate Calculation of the Periods of 

 Vibration of a Circular Plate: Prof. H. Lamb — Mathematical Notes: 

 Dr. H. F. Baker. — Note on a Point in Hilbert's Grundlagen der Geo- 

 metric: E. T. Dixon. — On Surfaces which have Assigned Families of 

 Curves as their Lines of Curvature : Prof. A. R. Forsyth — Extension of 

 Two Theorems on Covariants : J. H. Grace. — On Certain Sequences for 

 Determining the »th Root of a Rational Number : S. M. Jacob. 



FRIDA V. March 13. 



Royal Institution, at q.— Character Reading from External Signs: 

 Prof. Karl Pearson, F.R.S. 



Physical Society, at 5. — On the Interpretation of Milne Seismograms : 

 Dr. Farr. — A Potentiometer for Thermocouple Measurements : Dr. 

 R. A. Lehfeldt. — A Direct-Reading Potentiometer for Thermoelectric 

 Work : Dr. J. A. Harker — The Measurement of Small Resistances : A. 

 Campbell — A Resistance Comparator: Dr. R. A. Lehfeldt. 



Malacological Society, at 8. — Further Description of the Animal of 

 Damayantia carinata, Collinge : Lieut. -Col. H. H. Godwin-Austen, 

 F.R.S. —Note on the Generic Name Buliminus : B. B. Woodward. — 

 Notes on. Pleistocene Non-marine Mollusca from Portland Bill; and on 

 Holocene Non-marine Mollusca from Wilts, Dorset, Cambridgeshire and 

 Folkestone : R. Ashington Bullen. — On the Occurrence of Neritina 

 G rate loupi ana, Fer., in the Pleistocene at Swanscomb : A. S. Kennard 

 and B. B. Woodward. 



Institution of Civil Engineers, at 8. — Reconstruction of Midland 

 Railway Bridge No. 27, over the River Trent : A. R. Langton. 



Royal Astronomical Society, at 5.— On the Desirability of a Re- 

 investigation of Problems growing out of the Mean Motion of the 

 Moon : Prof. S Newcomb. — A Proposed Southern Belt of Latitude 

 Stations: Prof. S. C. Chandler.— On three of Sir W. Herschel's Ob- 

 served Nebulous Regions in Orion : Prof. Max Wolf. — On the Period 

 and Light Curve of 7514 UY Cygni : A. Stanley Willinms.— On the 

 Nebula h 2302 Cassiopeia; ; the Region surrounding H II. 457 Eridani 

 and y III. 55S Aquarii : Dr. Isaac Roberts. — A Series of Photographs 

 of Nebula;, &c, taken by Mr. Ritchey at the Yerkes Observatory will be 

 Exhibited. 



SATURDAY, March t 4 . 



Royal Institution, at 3.— Light : Its Origin and Nature: Lord 

 Rayleigh. 



MONDAY, March 16. 



Society of Arts, at S.— Hertzian Wave Telegraphy in Theory and 

 Practice: Prof. J. A. Fleming, F.R.S. 



Society of Chemical Industry, at 8. — The Standardisation of Analytical 

 Methods: H. Droop Richmond. — The Standardisa'ion of Commercial 

 Methods of Analysis, especially those applied to Brewing Materials : 

 Arthur R. Ling. 



TUESDAY. March 17. 



Royal Institution, at 5.— Great Problems in Astronomy: Sir Robert 

 Ball. 



Zoological Society, at 8.30. — Observations and Experiments on Japanese 

 Long-Tailed Fowls : J. T. Cunningham. — On some Nudibranchs from 

 East Africa and Zanzibar. No. II, : Sir Charles Eliot, K.C M.G — 

 Contributions to the Osteology of Birds. Part VI. Guculiform.es', 

 W. P. Pycraft. 



Society of Arts, at 4.30.— Artistic Fans : Miss Hannah Falcke 



Royal Statistical Society, at 5. — Statistics of Italy : Bolton King. 



Institution of Civil Engineers, at 8. — Papers to be further dis- 

 cussed : — Recent Irrigation in the Punjab: S, Preston. — The Irriga- 

 tion Weir across the Bhadar RU-er, Kathiawar : J. J. B, Benson. — 

 Paper to be read, time permitting: — The Protection Works of the 

 Kaiser-i-Hind Bridge over the River Sutlej, near Ferozepur : Amyas 

 Morse. 



no. 1 74 1, vol. 67] 



IVEDNESDA Y, March 18. 



Royal Microscopical Society, at 8. — The Helmholtz Theory of the 

 Microscope: J. W. Gordon. 



Society of Arts, at 8. — New Aspects of Life Assurance : William 

 Schooling. 



Chemical Society, at 5.30.— (1) Essential Oil of Hops: (2) On a Com- 

 pound nf Dextiose with Hydroxide of Aluminium : A. C. Chapman. — 

 Action of Phosphorus Haloids on Dihydroresorcins. Part II. Dihydro- 

 resorcin : A. W. Crossley, and P. Haas. — On the Constitution of 

 Cotarnine : J. J. Dobbie. A. Lauder, and C. K. Tinkler. — Decomposition 

 of Mercurous Nitrite by Heat : P. C. Ray and J. N. Seb. 



Entomological Society, at 8. — An Entomological Excursion to Bejar, 

 Central Spain : G. C Champion. — On L;pidoptera from the White Nile 

 collected by Mr. W. L. S- Loat, with further Notes on Seasonal Dimor- 

 phism in Butterflies: Dr. Frederick A. Dixey. — Hymenoptera acuieata 

 collected by the Rev. A. E. Eaton, in Madeira and Tenerife, in the 

 Spring of 1902 : E. Saunders, F R.S. 



Royal Meteorological Society, at 7.30. — The Passage of Sound 

 through the Atmosphere : C. V. Boys, F.R.S. 



THURSDA\ , March 19. 



Royal Society, at 4.30. — Probable Papers .— On the Formation of 

 Barrier Reefs and of the Different Types of Atolls : Prof. A. Agassiz, 

 For. Mem. R.S. — On Central American Earthquakes, particularly the 

 Earthquake ot 1838: Admiral Sir John Dalrymple Hay, Bart, F.R.S. — 

 On the Electrons of Radium : Sir William Crookes, F.R.S 



Linnean Society, at 8. — On Poa laxa and Poa stricta, of our British 

 Floras: G. Claridge Druce.— The Botany of the Ceylon Patanas. Part 

 II. Anatomy of the Leaves : John Parkin and H. H. W.Pearson. 



FRIDAY, March 20. 

 Royal Institution, at 9. — The Paths of Volition : Prof. E. A. Schafer, 



F.R.S. 

 Epidemiological Society, at 8.30 — The Prevention of Diphtheria Out- 



bieaks in Hospitals for Children : Dr. Louis Parkes. 

 Institution of Mechanical Engineers, at 8. — A Premium System 



applied to Engineering Workshops : James Rowan. 



SATURDAY, March 21. 

 Royal Institution, at 3. — Light : Its Origin and Nature : Lord 

 Rayleigh. 



CONTENTS. page 



The University in the Modern State. II 433 



Assyrian History 435 



Trustworthy Reagents. By C Simmonds .... 436 

 Out Book Shelf :- 



Arrhenius : "Text-book of Electrochemistry." — 



J- W 437 



Gamble: " A Manual of Indian Timbers " .... 437 

 Hansgirg : " Phyllobiologie, nebst Ubersicht der bio- 

 logischen Blatt-typen von ein und sechzig Siphono- 



gamenfamilien " 438 



Barrett: " The Lepidoptera of the British Islands" 438 

 Howe: "The Design of Simple Roof Trusses in 



Wood and Steel " 439 



French and Ives: "Stereotomy" 439 



Lubbock: " Round the Horn before the Mast . . . 439 

 Letters to the Editor : — 



Radio-activity of Ordinary Materials. — Hon. R. J. 



Strutt 439 



A Case of Pseudo-mimicry. — Capt. F. W. Hutton, 



F.R.S.; Prof. E. B. Poulton, F.R.S 439 



Area of Triangle in Terms of Sides. — Prof. J. D. 



Everett, F.R.S 440 



Leonardo da Vinci as a Hydraulic Engineer. (Illus- 

 trated. ) . 44° 



The Physiological Laboratory of the University of 



London. (Illustrated.) 441 



Prof. William Harkness. By W. E. P 442 



Notes 442 



Our Astronomical Column : — 



Elements and Search-Ephemeris for Comet 1896 V 



(Giacobini) 447 



Transparency of Comet 1902 b 447 



February Meteors 447 



Proper Motions of Stars 447 



Observations of Jupiter's Markings 447 



Solar Phenomena and Meteorology 447 



The Geological Survey of the United States . . . . 448 

 Anthropology: its Position and Needs. By Dr. 



A. C Haddon, F.R.S 449 



Electricity and Matter. By Sir Oliver Lodge, 



F.R.S 450 



University and Educational Intelligence 453 



Societies and Academies 454 



Diary of Societies 456 



