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(New York: J. Wiley and Sons, Inc.; London : Chap- 
man and Hall, Ltd.) 10s. 6d. net. 
Laboratory Manual, Direct and Alternating Current, 
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Boden-Bakterien und Boden-Fruchtbarkeit. 
F. Lohnis. Pp. vi+7o. (Berlin: 
traeger.) 1.20 marks. 
La Silice et les Silicates. By H. le Chatelier. 
574. _(Paris: A. Hermann et Fils.) 15 francs. 
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Sounds and Signs. By A. Wilde. Pp. 180. (Lon- 
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The Currents in the Guif of St. Lawrence. By Dr. 
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ment of Naval Service.) 
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1910 in ihrem Verhaltnis zu der II jahrigen Sonnen- 
fleckenperiode. By J. Mielke. Pp. 63. (Hamburg.) 
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Sen Ulete 
(Ottawa: Depart- 
DIARY OF SOCIETIES. 
THURSDAY, Marcu 26. 
Royat Society, at 4.30.—The Nature of the Tubes in Marsupial Enamel 
and its Bearing upon Enamel Development : J. H. Mummery.— Oxidation 
of Thiosulphate by Certain Bacteria in Pure Culture: W. T. Lockett.— 
The Production of Anthocyanins and Anthocyanidins: A. E. Everest.— 
Variations in the Growth of Adult Mammalian ‘Tissue in Autogenous and 
‘ Homogeneous Plasma: A. J. Walton.—(1) The Decomposition of Formates 
by &. coli communis; (2) The Enzymes which are Concerned in the 
Decomposition of Glicose and Mannitol by B. coli communis: BE. C. 
Grey.—Description of a Strain of 77yfSanosoma brucet from Zululand. 
I: Morphology. II: Susceptibility of Animals: Surg.-General Sir D. 
Bruce, Major A. E. Hamerton, Captain D. P. Watson, and Lady Bruce. 
Roya INSTITUTION, at 3.—The Progress of Modern Eugenics. I: The 
First Decade, 1904-1914: Dr. C. W. Saleeby. 
CoNcRETE INSTITUTE, at 7.30.—Discusston : Calculations and Details of 
Steel-frame Buildings from the Draughtsman’s Standpoint : W. C. Cocking. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8. Current Limiting React- 
ances on Large Power Systems: K. M. Faye-Hansen and Ja: Pecks 
INSTITUTE OF CHEMISTRY, at 8.—Explosives : W. Macnab. 
SociETY oF Dyers anv Co.ourists, at 8.—I]lumination in Connection 
with the Textile Industries: L. Gaster.—Further Note on the Estimation 
of Prussian Blue in Vextile Fabrics: H. E. Williams and W. P. Dreaper. 
FRIDAY, Marcu 27. 
Roya InstiruTION, at 9.—Improvements in Long Distance Telephony: 
Prof. J. A. Fleming. 
Junior Institution oF ENGINEERS, at 8.—Harmonigraph as Applied 
to Advertising: A. Forbes. 
FARADAY SociETy, at 5.—Discussion on Optical Rotatory Power.— 
Introductory Aidress: Prof. H. E. Armstrong.—Some Contributions to 
the Knowledge of the Influence of Certain Groups on Rotatory Power: 
Prof. H. Rupe. — New Studies in the Rotatory Dispersion of Tartaric Acid 
and Malic Acid : Prof. H. Grossman.—The Existence of Racemic Tartaric 
Acid in Solution: Dr. E. Darmois.—Anomalous Rotatory Dispersion: 
Prof. L. Tschugaeff — Normal and Anomalous Rotatory Dispersion: Dr. 
T. M. Lowry and T. W. Dickson. At 8.15.—An Enclosed Cadmium Arc 
for Use with Polarimeter: Dr. T. M/ Lowry and H. H. Abram.—The 
Relations between the Kotatory Powers of the Members of Homologecus 
Series: Dr. R. H. Pickard and J. Kenyon.—The General Behaviour of 
Optically Active Co:npounds as Regards the Dependence of Rotation on 
Temperature Dilution, Nature of Solvent, and Wave Length of Light: 
Dr. T. S. Patterson. 
Puysicat Society, at 5.—A New Type of Thermogalvanometer: F. W. 
Jordan.—An Instrument for Recording Pressure Variations due to 
Explosions in Tubes: J. D. Morgan.—The Direct Measurement of the 
Naperian Rase: R. Appleyard.—An Experiment with an Incandescent 
Lamp: C, W. S. Crawley, 
SATURDAY, Marcu 28. 
Roya INsTITUTION, at 3.—Recent Discoveries in Physical Science : Sir 
J. J. Thomson. 
Essex Fie_p Cvups (at the Essex Museum, Romford Road, Stratford), at 
6.—Some Notes on Essex Geology at the Close of the Nineteenth 
Century and After : W, Whitaker.—Wasgs and their Ways : C. Nicholson. 
MONDAY, Marcu 30. 
Roya. Society oF Arts, at 8.—Surface Combustion : Prof. W. A. Bone. 
INSTITUTE OF ACTUARIES, at 5.—The Treatment of the Depreciation in 
Assets due to an Enhanced Ratz of Interest: R. R. Tilt. 
NO: 23107, (NOL. 93 | 
NATURE 
[Marcu 26, 1914 
LUESDAY, Marcu 3t. : 
Roya INSTITUTION, at 3.—Landscape and Natural Objects in Classical 
Art: Later Greece and Rome: A. H, Smith. : 
ROVAL SOCIETY OF ARTS,‘at 4.30.—The Oil Resources of the Empire: D. F. 
Mollwo Perkin. } 
INSTITUTION oF CiviIL ENGINEERS, at 8.—Further Discussion: Some 
Recent Developments in Commercial Motor-vehicles: T. Clarkson.— 
Comparative Economics of Tramways and Kailless Electric Traction : 
T. G. Gribble. 
WEDNESDAY, AprRit 1. 
Society oF Pusiic ANaLysTs, at 8.—Damage Caused to Vegetation by: 
Sulphrous and Sulphuric Acids in the Atmosphere: R. R. Tatlock and 
R. T. Thomson. —Abnormal Refraction of Milk Serum: Dr. J. McCrae. 
~—Water of Dorton Spa: C. A. Mitchell. 
AERONAUTICAL SOCIETY, at 8.30.—Aeroplanes. G. de Haviland. 
ROYAL SOCIETY OF ARTS, at 8.—Sarawak: Her Highness The Ranee of 
Sarawak. 
ENTOMOLOGICAL SOCIETY, at 8. 
THURSDAY, Aprit 2. 
ROYAL Society, at 4.30.—Bakerian Lecture : Series Lines in Spark Spectra : 
Prof. A. Fowler. : 
RovaL InstTiTuTION, at 3.—The Progress of Modern Eugenics. II. 
Eugenics To-day: Its Counterteits, Powers, and Problems: Dr. C. W. 
Saleeby. : 
CuiLp Stupy Society, at 7.30.—The Nervous Child : Dr. L. Guthrie. _ 
INSTITUTION OF ELECTRICAL ENGINEERS, at '8.— The Signalling ofa Rapid 
Transit Railway: H. G. Brown. i 
FRIDAY, Aprit 3. 2 
RoyaL INSTITUTION, at 9.—Further Researches on Positive Rays: Sir 
J. J Thomson. : 
INSTITUTION OF CiviIL ENGINEERS at 8.—East Stirlingshire Waterworks, 
and a Note on Earthen Embankments: O. I. Bell. 
SATURDAY, Aprrit 4. : ? ) 
Roya INSTITUTION, at 3.—Recent Discoveries in Physical Science : Sir 
J. J. Thomson. 3 
CONTENTS. PAGE 
Theodore Roosevelt as Naturalist. By Sir H. H. 
Johnston, GiC.M.G:, 1K C°By fa. &) a: veneer? 
American Text-Books of Biology ........ 80 
Supernatural Religion. By A. E. Crawley. .... 81 
Our Bookshelf oe A ich PES aaa trea a 
Letters to the Editor :— 
The Movements of Floating Particless—R.. . ... 83 
Weather Forecasts.—Prof. Alexander McAdie . . 83 
Origin of Structures on the Moon's Surface.—F. J. M. 
Stratton Ba heh : A ay ea Oa 
The Isothermal Layer of the Atmosphere.—G. 
Fitzhugh Talman . sa gdl pas heey J) she ROE 
Unidirectional Currents within a Carbon Filament 
Lamp.—F. Lloyd Hopwood .... . .. 84 
The Archeological Survey of Nubia. (///ustrated.) ; 
Prof, Gy Elliot Smith, Boke Sseee oie. eens 
The Criminal and the Crime PSU een 
Sir John Murray, K.C.B., F.R.S. By Sir Arch. 
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Profskss: Holden. ) By, Webi ee eee 
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The Institute of Metals Ps oe eR ote OS 
AneEelworm ‘Disease of Rice = «ene a sie eoO 
Meteorology in Netherlands’ East India .... 96 
Exploration in Peru. (///ustrated.) By Prof. Hira 
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