182 
NATURE 
[APRIL 16, 1914 
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Defensive Ferments of the Animal Organism. By 
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DIARY OF SOCIETIES. 
THURSDAY, Aprit 16. 
CoNCRETE INSTITUTE, at 7.30.—The Design of Steel and Reinforced 
Concrete Pillars with special reference to Secondary and Accidental 
Stresses; O. Faber. 
InsTITUTION OF MINING AND METALLURGY, at 8.—Notes on Mine Survey 
Records and Calculations: C. G. Priest and W. Whyte.—Collecting and 
Handling Flue Dust: E. Huntley.—A Description of a Portion of 
Equatorial Africa: H. W. Hill. 
FRIDAY, AprRiv 17. 
MALACOLOGICAL Society, at 8.—Notes on Australian Mactride: E. A. 
Smith.—On the Generic name Martensia, Semper: Some more notes on 
Polyplacophora, I. : T. Iredale.—Description of a new recent Pholadomya 
from Tasmania: C. Hedley and W. L. May.—Description of a New 
Helicoid from South Ausiralia : G. K. Grude. 
Junior InstTiTuTION OF ENGINEERS, at 8.—A Few Typical Carburetters: 
R.S. Fox. 
ASSOCIATION OF Economic Biotocists (at Royal College of Science), at 
10 a.m.—The Organism of (ommon Potato Scab. (Actinomyces scabies. 
(Thaxter) Giissow): H. T. Giissow.—Potato Diseases: A. S. Horne.— 
Insect, causing Blotch on Potato Foliage: A. S. Horne and H. M. 
Lefroy.—Standard Fungicides and Insecticides : A. G. L. Rogers. —Obser- 
vations on Aphis rumicis: J. Davidson.—The Golf Green Fly: A. W. 
Westrop.—Observation on the Winter Stage of the American Gooseberry 
Mildew. (Sphaerotheca mors-Uvae): E.S. Salmon.—The Darkening of 
Oak: P. Groom.—The Phytopathological Conference : A. G. L. Rogers. 
—Apple and Pear Sucker: P. R. AwatiicAn Experiment in House 
Fumigation: H. M. Lefroy.—Life-history and Habits of AJleurodes 
vaporariorum: K. Hargreaves. 
SATURDAY, Apri 18. 
ASSOCIATION OF Economic Broxocisrs, at 10 a.m. (See Papers under 
April 17.) 
MONDAY, Apriv 20. 
Junior INsTITUTION oF ENGINEERS, at 8.—Lines of Future Development 
in High Power Diesel Oi) Engines: J. Richardson. 
Victoria INSTITUTE, at 4.30.—The Latest Discoveries in Babylonia: Dr. 
T. G. Pinches. 
TUESDAY, Aprit 21. 
Roya InstTiTUTION, at 3.—Problems of Physical Chemistry. I. Study 
of Matter at High Pressures: Dr. W. Wahl. 
Royal. SratrisTicat Society, at 5.—Rural Population in England and 
Wales A Study of the Changes of Density, Occupations and Ages: Dr. 
A. L. Bowley. 
INSTITUTION OF CiviL ENGINEERS, at 8.—Further Discussion: The 
Transportation Problem in Canada, and Montreal Harbour: F. W. Cowie. 
ZOOLOGICAL SOCIETY, at 8.30.—Further Contributions to the Anatomy of 
the Ophidia : Surg. J. C. Thompson.—Crustacea from the Falkland Islands 
Collected by Mr. Rupert Vallentin. II: Rev. T. R. R. Stebbing. — 
Report on the Arachnida and Myriopoda Collected by the Britis!) Orni- 
thologists’ Union Expedition and the Wollaston Expedition in Dutch New 
Guinea: S. Hirst.—The Coloration of the African Hunting Dog 
(Lycaon pictus): Major J. Stevenson Hamilton.—Notes on Avr istens 
goldiez, Macleay, and on some other Fishes from New Guinea: C. Tate 
Regan.—The Courtship-habits of the Great Crested Grebe (Podiceps 
cristatus); with an Addition to the Theory of Sexual Selection; J. S. 
Huxley. 
NO. 2320, VOL. 93] 
WEDNESDAY, ApRIL 22. 
Royat METEOROLOGICAL SOCIETY, at 7.30.—Report on the Phenological 
Observations for .1913: J. E. Clark and R. H. Hooker.—A Small 
Anemometer for Tropical Use: A. J. Bamford. 
Farapay Society, at 8.—Recording Pyrometers: C. R. Darling.—The 
Embrittling of Iron by Caustic Soda: J. H. Andrew.—Diffusion and 
Membrane Potentials: Dr. E. B. R. Prideaux.—The Acidic and Colloidal 
Properties of Aluminium Hydroxide: Dr. R. E. Slade and W. G. Polack. 
—‘* Negative’’ Absorption: A. M. Williams. 
THURSDAY, Aprit 23. 
Royat GEOGRAPHICAL SOCIETY, at 5.—The East African Trough: J. 
Parkinson. 
CuiLp Stupy Society, at 7.30.—Raising the Standard of Child Upbringing 
Rev. J. C, Pringle. 
ConcRETE INSTITUTE, at 7.30.—Sand and Coarse Material and Proportion- 
ing Concrete: J. A. Davenport and Prof. S. W. Perrott. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—Electrification of Railways 
as affected by Traffic Considerations : H. W. Firth. 
FRIDAY, Apri 24. 
Roya INSTITUTION, at 9.—The Stars around the North Pole: Dr. F. W. 
Dyson, 
Teak INSTITUTION OF ENGINEERS, at 8.—A Visit to the Iron Districts 
of French Alsace : G. Evetts. 
INSTITUTION OF MECHANICAL ENGINEERS, at 8.—Application of Electrical 
Driving to Existing Rolling Mills: L. Rothera. 
SATURDAY, Arrit 25. 
Rovat INSTITUTION, at 3.—Similarity of Motion in Fluids. I. The 
Theory of Similarity of Motion in Fluids and the Experimental Proof of 
its Existence: Dr. T. E. Stanton. 
CONTENTS. PAGE 
‘“«The Golden Bough” Completed. By A. E. Crawley .157 
Assayof Precious Metals) | By aK] Roe ena 
Seismological Physics .... 158 
Pure Mathematics «0G Nite st S550 5 teen ene ae ee 
Our Bookshelf. °°). sh oe ee on ve 
Letters to the Editor :— , 
Cellular Structure of Emulsions. (Z2/zstrated.)—Prof.  _, 
Kerr Grant | 162 
A Simple Method of Aerating Marine and other ; 
Aquaria. (Z//ustrated.)—Ellis W. Gildersleeves 162 
The Red Sea Coast. (///ustrated.) By H.G. L.. 163 
The Lawes and Gilbert Centenary Fund... . 164 
The Life-History of the Eel. By D. W. T.. 164) 
Carte Internationale du Monde au Millionieme . 166 
International Convention on Plant Diseases . 167 
IN(OLE SN xc 7s ai aye tone 1 ea eta > Fe eaediate 168 
Our Astronomical Column :— 
Axpril Shooting: Stags s-) +) eee iremen te su isene 172 
Nova Geminorum No. 2. 172 
Diurnal Variations of Latitude 172 
A Pexpetual:€alendare .°~  eeeuhe) =) -0 =) poe a 
Primary Education and Beyond. By Prof. R. A. 
Gregory. 0.4) Soa ee ate ig renee 173 
Cytological Aspects of Heredity ......+.-. 175 
The Currents in Belle Isle Strait. ....... 175 
Superstitions Relating to Weather . erg) a 176 
Theories of Ore-Genesis, By Dr. F. H. Hatc 176 
University and Educational Intelligence . 180 
Societies and Academies 180 
Boskis"Received .  .0 uh a GeeRR ee GO eee 
Diary of. Societies. . 22 acl 0ce ela) 3S Ee ee 
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