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Rubber : its Sources, Cultivation, and Preparation. 
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Wild Game in Zambezia. By R. C. F. Maugham. 
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Memoirs of the Geological Survey of India. 
Vol. xliii. Part 1. Indian Geological Terminology. 
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DIARY OF SOCIETIES. 
. THURSDAY, Frervary 109. 
Roya. Society, at. 4.30.—The Brain of Primitive Man, with Special 
Reference to the Cranial Cast and Skull of Eoanthropus (The Piltdown 
Man): Prof. G. Elliot Smith.—Oxidases: Prof. A. J. Ewart.—A New 
Malaria Parasite of Man: Dr. J. W. W. Stephens.—Investigations 
Dealing with the Phenomena of ‘‘Clor” Formations. II: The Formation 
of a Gel from Cholate Solutions having many Properties Analogous to 
those of Cell Membranes: S. B. Schryver.—The Influence of the Position 
of the Cut upon Regeneration in Gunda ulvae: D. Jordan Lloyd. 
INSTITUTION OF MINING AND METALLURGY, at 8.15.—The Assay of Tin 
Ores: H. W. Hutchin.—The Assay of Tin Ores and Concentrates : The 
Pearce-Low Method: E. A. Wraight and P. Litherland Teed. —Formation 
of Mineral Deposits: Precipitation and Stratification in the Absence of 
Gels: W. P. Dreaper.—A Device for Filling Ore Sacks : T, R. Archbold. 
—A Mining Model: E. O. Marks. 
honeas Sociery, at 8.—The Origin of Species by Crossing: Dr. J. P. 
otsy. r 
Cuitp Stupy Society, at 7.30.—Speech Defects of Children and thei 
Treatment: Dr. E. W. Scripture. 
FRIDAY, FEBRUARY 20. 
Rovat InstiTuTIon, at 9.—Busts and Portraits of Shakespeare and of 
Burns: An Anthropological Study: Prof. Arthur Keith. 
INSTITUTION OF Mecuanicat. ENGINEERS, at 8.—Annual General Meeting. 
—Some Modern Methods of Welding; T. T. Heaton. 
InstTITUTION OF Civit ENGINEERS at 8.—The Use of Reinforced Concrete 
in Connection with Dock and Other Maritime Work : C. S. Meik. 
SATURDAY, Fesrvary 21. 
Royat InstituTI0N, at 3.—The Electric Emissivity of Matter : Dr. As 
Harker. 
MONDAY, Fesruary 23. 
Royat Society oF Arts, at 8.—Artistic Lithography: J. Pennell. 
Rovat. GEocrapuicat Society, at 8.3c.—The Sea Route to Siberia: Dr. 
Fridtjof Nansen and J. Lied. 
TUESDAY, Fesrvary 24. 
Roya Institution, at 3.—Animals and Plants under Domestication : 
Prof. W. Bateson. 
Roya ANTHROPOLOGICAL INSTITUTE, at 8.15.—The Bantu Coast Tribes 
of the East African Protectorate : Miss A. Werner. 
InstiTuTION oF Civit ENGINERRS, at 8.—Rail-steels for Electric Rail- 
ways : W. Willox.—Rail-corrugation and its Causes: S. P. W. D’Alte 
Sellon. 
WEDNESDAY, FEuruary 25. 
Royat Society oF Arts, at 8.—Rural Housing: ‘f. Brice Phillips. 
GEoLocicaL Society, at 8.—Acid and Intermediate Instrusions and Asso- 
ciated Ash-Necks in the Neighbourhood of Melrose (Roxburghshire) : 
Rachel W. McRobert.—Correlation of the Dinantian and the Avonian : 
Dr. A. Vaughan. 
THURSDAY, FEBRUARY 26. 
Royat Society, at 4.30.—Probable Papers: The Diffraction of Light by 
Spheres of Small Relative Index: Lord Rayleigh.—(r) Studies of the 
Properties Operative in Solutions. XXXI. Sulphonic Acids and Sulphuric 
Acid as Hydrolytic Agents : A Discussion of the Constitution of Sulphuric 
and other Polybasic Acids and of the Nature of Acids ; (2) Studies of the 
Properties Operative in Solutions, XXXII. The Influence of Sulphonates 
on the Hyd=-lytic Activity of Sulphonic Acids: A Contribution to the 
Discussion "nfluence of Neutral Salts: Prof. H. E. Armstrong and 
NO. 2312, VOL. 92| 
NATURE 
| 
[FEBRUARY I9, 1914 
Prof. F. P. Worley.—Morphological Studies of Benzene Derivatives. 
V. The Correlation of Crystalline Form with Molecular Structure: A 
Verification of the Barlow Pope Conception of “* Valency-Volume” : Prof. 
H. E. Armstrong. R. T. Colgate, and_E. H. Rodd.—The Magnetic 
Properties of Iron when Shielded from the’Earth’s Magnetism: Prof, E. 
Wilson.—The Occurrence of Ozone in the Upper Atmosphere: Dr. J. N- 
Pring.—(1) A Meteoric Iron from Winburg, Orange Free State ; (2) The 
Electrification Produced during the Raising of a Cloud of Dust: W. A. D. 
Rudge.—The Electrical Ignition of Gaseous Mixtures: Prof. W. M. 
Thornton. s : 
Concrete InstituTe, at 7.30.—Calculations and Details for Steel-frame 
Buildings from the Drauglitsman’'s Standpoint : Cyril W. Cocking. _ 
INSTITUTION OF ELECTRICAL EKNGINEERS, at 8.—Motor and Control 
Equipments for Electric Locomotives: F. Lydall. : ree 
Sociery or Dyers anp CotourisTs. at 8.—The Industrial Possibilities 
of Nitrocellulose : C. A. Higgins.—Notes on the Fading of Dyed Silk: 
A. Jones and G, W. Parr. 
FRIDAY, FEBRUARY 27. ee 
Royat INsTiITUTION, at 9.—Surface Combustion: Prof. W. A. Bone. r 
SweEpENBoRG Society. at 8.15.—The Body and the Sou] in Swedenborg’s 
Philosophy : Dr. L. de Beaumont-Klein. : ‘ 
LnsTITUTION OF CiviL ENGINEERS, at 8.—The Use of Reinforced Concrete 
in Connection with Dock and other Maritime Work: C. S. Meik. 
SATURDAY, Fesrvary 28. F k 3 
Roya InsTITUTION, at 3.—Recent Discoveries in Physical Science: Sir 
J. J. Thomson. 
CONTENTS. 
The Practical Metallurgy of Steel. By Prof. 
mornold, FIRS. |). 83 Pte eae 
Popular and Special Physics . . Retr oes 
Three Books on Entomology. By F.A.D.... . 
Our Bookshelf . .... .0« 2) = ayes 
Letters to the Editor :— oo 
The Constitution of the Interior of the Earth as Re 
vealed by Earthquakes.—R. D. Oldham, F.R.S. 
The Evidence for Spontaneous Generation.—Dr, H. 
Chariton Bastian, F.R.S. 4 
The Wearing of Birds’ Plumage—A 
tes.—O.L. . . . , 1 2) oso" 
Specific Heats and the Periodic Law—An Analogy 
from Sound.—Reginald G, Durrant... . . 
X-Rays and Metallic Crystals. (J//ustrated.)—E. A. 
Owen;G.G. Blake .  CELbs) ty ee F 
The Magneton and Planck’s Constant.—S. D. 
Chalmers . . 2 | My ant oe : 
Zonal Structure in Colloids.\—Dr. H. J. Johnston-- © 
Lavis ; George Abbott. “. 5). | sy. -taneeeenneem 
Three Books About Birds, (///ustrated.)..... .« 
The Radiation Problem. By Dr, E. E. Fournier 
d’Albe © ee Sie (STR a 
Transparence or Translucence of the Surface Film 
Produced in Polishing Metals. (/Vth Plate.) By 
Dr. .G, T. Beilby;, FiRiSan- ease: tes 
H..B. Woodward, F.R.S.. 0 ee is ee eee 
Col. A. R. Clarke, C.B., F.R.S. By Capt. H. S, L. 
Winterbotham, RE: 205% <). sane 
Notes... 20.) jks Se 
Our Astronomical Column :— ; 
Detonating Fireball of January19........-. 
The Total Solar Eclipse of August 21 next . . . . . 698 
The Absorption of Lightin Space. . .......- 
Who’s Who in Astronomy ......+-+.+-.-. 
Work. of the Vienna Radium Institute. By F.S. . 
Smoke and Smoke Prevention .... ... 
Antarctic Problems. By Prof, Edgeworth David, 
CIMG., BR San; alee Meerecre 
University and Educational Intelligence. .... . 
Societies and Academies’ ."..5..0 s)/3) 5 eee 
Books ‘Received . ((. irs 0) si <\ ate) 309) 
Diary of Societies) 2 essen = 
PAGE 
j. O. 
eed, Sages le seal i 
682 
683 
684 
684. 
685 
685 
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