3/2 
NATURE 
[JUNE 4, 1914 
The Statesman’s Year-Book. Edited by Dr. J. Scott 
Keltie, assisted by Dr. M. Epstein. Pp. Ixxix+ 1500. 
(London : Macmillan and Co., Ltd.) os. 6d. net. 
The Standard Cyclopedia of Horticulture. By L. H. 
Bailey. Pp. xx+602+xx plates. (London: Mac- 
millan and Co-, Ltd.) 25s.)inet: 
The Institute of Chemistry of Great Britain and 
Ireland. Lectures on -Explosives. By W. Macnab. 
Pp. 68. (London: 30 Bloomsbury Square.) 
Twelfth Report of the Sarawak Museum, 
By J. C. Moulton. Pp.-ii+47. (Sarawak.) 
Poems of Human Progress. By J. H. West. Pp. 
xii+ 328. (Boston: The Tufts College Press.) 1.50 
dollars net. 
Preliminary Practical Science. 
1913. 
By H.. Stanley. 
Pp. viiit128. (London: Methuen and Co., Ltd.) 
1s. 6d, 
Gearing. By A. E, Ingham. Pp. xi+181. (Lon- 
don: Methuen and Co., Ltd.) 5s. net. 
DIARY OF SOCIETIES. 
THURSDAY, Jone 4. 
Roya INSTITUTION, at 3.—Faraday and the Foundations of Electrical 
Engineering : Prof. S. P- Thompson, 
LiInnEAN SocIETY, ‘at 8.—The Botanical Results of a Recent Expedition to 
Turkestan: Dr. B. Fedtschenko.—Darwin’s Alternative Explanation of 
the Origin of Species wzthout the Means of Natural Selection: Prof. G. 
Henslow.—A Collection of Land and Freshwater Gastropods from 
Madagascar, with Descriptions of a New Genus and New Species: G. C. 
Robson.—Sections showing the Entire Vertical Thickness of a Seam of 
Coal: J. Lomax. —Notes on the Morphology of Certain Structures con- 
cerned in Reproduction in the Genus Gnetum: Prof, H. H. W. Pearson, 
—Curculionide from the Indian Ocean, (Percy Sladen Expedition): 
G..C. Champion.—Deto, a Subantarctic Genus of Terrestrial Isopoda : 
Prof. C. Chilton. 
FRIDAY, June 5. 
Royat INSTITUTION, at 9.—X-rays and Crystalline Structure: 
W. H. Bragg. 
GEoLoaisTs’ ASSOCIATION, at 8.—Prehistoric Problems in Geology: R. A, 
Smith. 
Prof. 
SATURDAY, June 6. 
Roya. INSTITUTION, at 3.—Studies on Expression in Art. 
Development : Sigismund Goetze, 
MONDAY, June 8. 
ARISTOTELIAN SOCIETY, at 8.—The Treatment of History by Philosophers: 
D. Morrison. 
SociETY OF CHEMICAL INDUSTRY, at 8.—The Dickson Centrifuge System 
of Sewage Jreatment: E. H. Tripp.—Studies on the Reduction of 
Uranium Oxide : E. K. Rideal.— Contribution to the Discussion on Paper, 
Bleaching of Chemical Pulp, by Baker and Jennison, and Bleaching 
Efficiency considered in connection with Suggested Standard for Testing 
Bleaching Qualities of Chemical Wood Pulp: C. Beadle and H. P. 
Stevens. 
INSTITUTE OF ACTUARIES, at 5.—Annual Meeting. 
I.: Origin and 
Royat GEOGRAPHICAL SOCIETY, at 8.45.—The Australian Antarctic Expedi- 
tion: Dr. D. Mawson. 
TUESDAY, Jone go. 
Roya. INSTITUTION, at 3.—Celestial Spectroscopy: Prof. A. Fowler. 
ZOOLOGICAL SOCIETY, at 8.30.—A Report on the Fauna of the Monte Bello 
Islands: P. D. Montague.—Cephalopoda from the Monte Bello Islands: 
G. C. Robson.—Stalk-eyed Crustaceans collected at the Monte Bello 
Islands: Miss M. J. Rathburn.—Report on Mollusca collected at the 
Monte Bello Islands: T.. Jredale.—Zoological Results of the Third 
Tanganyika Expedition conducted by Dr. W. A. Cunnington, 1904-1905. 
Report onthe Parasitic Eucopepoda: Dr. W. A. Cunnington.—Contribu- 
tions to the Anatomy and Systematic Arrangement of the Cestoidea. 
XIV. A New Species of Rhabdometra and on the Paruterine Organ in 
Otiditenia: Dr. F. E. Beddard.—The Marine Fauna of British East 
Africa, from Collections made by Cyril Crossland, in the Years.1991-1902 : 
A. W. Waters. —(1) The Facial Vibrissz of Mammals ; (2) The Feet and 
other External Characters of the Urside# and Canidz: R. I. Pocock. — 
Procolophon trigoniceps : a Cotylosaurian Reptile from South Africa : 
D. M. S. Watson.—A Second Collection of Batrachians and Reptiles 
made by Dr. H. G. F. Spurrell, in the Choco, Colombia: Dr. G. A. 
Boulenger. 
R6NTGEN SOCIETY, at 8.15.—Annual General Meeting. 
WEDNESDAY, June to. 
GEOLOGICAL SocIETY, at 8.—The Geology and Glaciology of the Antarctic 
Regions: Dr. D. Mawson.—The Ballachulish Fold at the Head of Loch 
Creran (Argyllshire): E. B. Bailey. 
NO! 2327, VounGa\ 
THURSDAY, June 11. 
Roya Society, at 4.30.—Croonian Lecture: The Bearing of Cytological 
Research on Heredity: Prof. E. B. Wilson. 
Roya InstiruTion, at 3.—Faraday and the Foundations of Electrical 
Engineering: Prof. S, P. Thompson. 
FRIDAY, June 1. 
Roya. InstiTuTION, at 9.—Some Aspects of the American Democracy : 
The Hon. W. H. Page. 
Roya ASTRONOMICAL SOCIETY, at 5. 
Puysicat Society, at 8.—Note on the Connection between the Method of 
Least Squares and the Fourier Method of Calculating the Co-efficients of 
a Trigonometrical Series to Represent a Given Function or Series of 
Otservations: Prof. C. H. Lees. —A Magnetograph ior Measuring Varia- 
tions in the Horizontal Intensity of the Earth’s Magnetic Field: F. E. 
Smith. —The Atomic Weight of Copper by Electrolysis: A. G. Shrimpton. 
—Note on an Improvement in the Einthoven String Galvanometer : 
W. H. Apthorpe. 
MALACOLOGICAL SOCIETY, at 8.—Suleobasis concisa, Fer., and its Nearest 
Allies : C. R. Boettger.—Note on the radula and maxilla of O7vthalicus 
zebra, Miiller: Rev. E. W. Bowell.—(1) Invalid Molluscan Generic 
Names ; (2) A New Cassid: T. Iredale.—The Relative Claim to Priority 
of the Names Helix cavduelis, Schulze, and Helix fruticum, Miiller : 
G. K. Gude. 
SATURDAY, June 13. 
Royac InstTiTUTION, at_3.—Studies on Expression in Art. I 
Expression in Modern Conditions : Sigismund Goetze. 
I.: Right 
CONTENTS. PAGE 
Medieval Technology. By Prof. Walter M.Gardner 343 
Taxonomic Zoology . SRE 6 85 343 
Six Essays on Sex. BY J. ALT. d Aveo se BAS 
Our Bookshelf : Peennterneee Vi) te cs Sie: 
Letters to the Editor :— 
Efficiency of Damped Seismographs.—Prince B. 
Galitzin : + 349 
Spectra of Secondary xe Rays. —Duc de Broglie . . 349 
Weather Forecasts. (W2th Déiagram.)—A. Mallock, 
aks Re eartrne Rieee 2y. 0s) 
The Plumage Bill. —Lieut,-Col. if Manners-Smith; 
Sir H. H. Johnston, G.C.M.G.,K.C.B. . . 350 
Atomic Volume Curves of the Elements.—-Dr. R. M. 
Caven; Prof. R. Meldola, F.R.S. .. 351 
Transmission of Electric Waves Round the Bend of 
the Karth.—Dr. We Eccles) 4 2 25) 0.) eal 
Screncerand the«State ss: ieee eer 
Popular Natural History. (J///ustrated.) ..... . 353 
The Roger Bacon Commemoration at Oxford . . . 354 
Sir perere Wilson Swan, F.R.S. ey W. A. sees O’M. 355 
Drab. Pye-Smith, URS... : 356 
Notes .. af tictdowe at ge OA ar assgeren eOe 357 
Our Astronomical Column :— 
Rotating Nebule .. . sv diss, vo yies pga 
Collated List of Lunar Formations . . Beh tr aS 
The Light of Stars . . Sigie 6: YS eae S OL 
The Spectrum of 7 Carine (n ‘Argus) HEROES ee ee 362 
Scottish Fishery Investigations. ByE. J. Ae 362 
Thirteen Years’ Measurements of Solar Radiation. 
Bye. Gold... . . See, Bes ae She 
American Research on Clays. "By Dr. if W. Mellor 364 
Fluid Motions. (With Diagrams.) By Lord ney 
leigh O7M.. FR.S) 2 ee 364 
The Utilisation of Solar Energy. (Zilustrated.) . 366 
University and Educational Intelligence. . . . . . 366 
societiesiand+Academicsie.. meen ee OZ 
Books Received . Pe ion ao Eee ard a fot: 3355) 
Diary of Societies . 370 
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