28 NATURE 

[Marcu 4, 1915 

February 22.—M. Ed. Perrier in the chair.—The presi- 
dent announced the death of E. H. Amagat, a member 
of the academy in the section of physics.—G. Mittag- 
Leffler: \ new theorem in the theory of the series of 
Dirichlet.—J. Tavani: The integral I(p) and its rela- 
tions with other definite integrals—Marcel Baudowin : 
The discovery and excavation of a menhir found up- 
right and completely buried in a marine alluvium on 
the coasts of Vendée.—V. Lubimenko : New researches 
on the pigments of the Chromoleucites.—D. Olaru ; 
The favourable action of manganese on the bacteria 
of the leguminosae.—Louis Roule: A new genus of 
apodal fishes, and some peculiarities of the biology of 
these creatures.—G. Daumézon: The potato as an 
agent of dissemination of Friedlander’s, pneumo- 
bacillus in nature, and especially in water. 
BOOKS RECEIVED. 
Indian Museum. Annual Report, April, 1913, to 
March, 1914. (Calcutta: Indian Museum.) 
Bulletin de Institut Aérodynamique de Koutchino. 
Fasc. v. Pp. 296. (Moscou: I. N. Kouchnéreff et 
Cie.) 
Soil Conditions and Plant 
Russell. New edition. Pp. viiit+1rg0. (London: 
Longmans and Co.) 5s. net. 
The Carnegie ‘Trust for the Universities of Scot- 
land. Thirteenth Annual Report (for the year 1913- 
14). Pp. 87. (Edinburgh: T. and A. Constable.) 
Practical Science and Mathematics for the Second 
Year Preliminary Technical or Industrial Course. By 
E. J. Edwards and M. J. Tickle. Pp. viti+175. 
(London: G. Routledge and Sons, Ltd.) ts. 6d. net. 
Growth. -By Dr. E- J.- 

DIARY OF SOCIETIES. 
THURSDAY, Marcu 4. 
Roya Sociery, at 4.30.—A Bolometric Method of Determining the 
Efficiency of Radiating Bodies : Prof. W. A. Bone. Prof. H. L. Callendar, 
and H. J. Yates.—The Simplification of the Arithmetical Processes of 
Involution and Evolution: E. Chappell.—The Elastic Properties of Steel 
at Moderately High Temperatures: F. E. Rowett.—The Laws of Series 
Spectra: Prof. J. W. Nicholson. 
Roya InstiTuTION, at 3.—Poetry and War: Sir Herbert Warren. 
Royat GeroGRAPHICAL Society, at 5.—Suess’s Classification of the 
Eurasian Mountains: Prof. J. W. Gregory. 
Linnean Society, at 5.—The Lichens of South Lancashire: J. A. Whel- 
don and W. G. Travis.—The Germination of Marah (Echinocystis Marah, 
Cogn.): A. W. Hill.—New Types of Stem-anatomy in Cycadeoidea, and 
a well-petrified new Species: Dr. Marie Stopes.—Description of a new 
Gems and Species of Terrestrial Isopoda from British Guiana: W. E. 
ollinge. 
FRIDAY, Marcu 5. 
Royat INnstTiTUTION, at 9.—Mimicry and Butterflies: Prof. E. B. Poulton. 
GEo.osists’ AssociaTION, at 8.—Geology of the Glasgow District : Prof. 
J. W. Gregory. 
SATURDAY, Marcu 6. 
RovaL INSTITUTION, at 3.—Recent Researches on Atoms and Ions: Sir 
J. J. Thomson. 
MONDAY, Marcu 8. 
Royat GeroGrapuicat Society, at 8.30.—Our 
Geography : Prof. Stanley Gardiner. 
TUESDAY, Marcu o. 
Roae INSTITUTION, at 3.—Photography in Natural Colours : Prof. W. J. 
ope. 
ZOOLOGICAL SOCIETY, at 5.30. 
INSTITUTION OF CiviL. ENGINEERS, at 8.—The Improvement of the River 
Clyde and Harbour of Glasgow, 1873-1914: Sir Thomas Mason. 
WIRELESS Society, at 8.—Waves.: Dr. J. Erskine-Murray. 
WEDNESDAY, Marcu tro. 
Roya Society or Arts, at §.—Patent Law Reform and the War: Waris 
Gordon. 
Geo.ocicaL Society, at 8.—The Plants of the Late Glacial Deposits of 
the Lea Valley: Clement Reid.—The Genus Lonsdaleia and Dibuno- 
phyllum rugosum (McCoy); S. Smith. 
THURSDAY, Makcu 11. 
Roya Society, at 4.30.—Probable Papers: Contributions to the Study 
of the }ionomics and Reproductive Processes of the Foraminifera: 
E. Heron-Allen.—The Occurrence of an Intracranial Ganglion upon the 
Oculomotor Nerve in Scyllium Canieula, with a suggestion as to its Bear- 
ing upon the question of the Segmental Value of certain of the Cranial 
NO. 2366, VOL. 95] 
Fisheries and their 


Nerves: G. E. Nicholls. —Experiments on the Restoration of Paralysed 
Muscles by Means of Nerve Anastomosis. Part III. Anastomosis of 
the Brachial Plexus with a consideration of the Distribution of its Roots ; 
Prof. RK. Kennedy.—On the Mechanism of the Cardiac Valves. A Pre- 
liminary Communication: A. F. S. Kent. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—Electric Cooking, mainly 
from the Consumer's Point of View: W.-R. Cooper. 
CuILp Stupy Society, at 6.—Discussion ; The Care and Development of 
the Child—durirg School Age —Treatment Centres and their Possibilities: 
Miss Margaret McMillan.—Care Committees: Mrs. Evelyn. 
FRIDAY, Makcu 12. 
Roya InsTiTUTION, at 9.—Back to Lister: Sir R. J. Godlee. 
Puysicai. Society, at §.—(1) The Estimation of High Vemperatures by the 
Method of Colour Identity: (2) The Unit of Candle-power in White 
Light: C. C. Paterson and B. P. Dudding.—The Relative Losses in 
Dielectrics; in Equivalent Electric Fields, Steady and Alternating 
(R.M.S.): G. L. Addenbrooke, 
MALACOLOGICAL Society, at 8.—Helicella crayfordensis, n.sp. from the 
Pleistocene deposits of S.E. England: A. S. Kennard and B. B. Wood- 
ward,—Further Notes on Radulz: the Rev. E. W. Bowell.—The Editions 
of Swainson'’s ‘‘ Exotic Conchology”: A. Reynell. 
Roya ASTRONOMICAL SOCIETY, at 5. 
SATURDAY, Marcu 13. 
Roya InstiTuTION, at 3.—Recent Researches on Atoms and Ions: Sir 
J. J. Thomson. ‘ 

CONTENTS. PAGE 
Time and Space . tha Meadontomce ghee o's: ene 
Applied Mechanics and American Timbers. By P. G. 
Wiatemreptiless By A. Ss \VVeue) 1) on =) =) 1.) 1) emnCnne 
Mindvandy Matter.) Byr¢Acerdon rn) esti a) ema 
Our Bookshelf eat ci ee RE. 2 
Letters to the Editor :— 
The Spectra of Hydrogen and Helium.—Dr. N. Bohr 6 
X-Ray Fluorescence and the Quantum Theory.— 
mwow nw 
Prof, GC; Gs Barkla, HaRsSi) ©. = ; . J. eee 
The Physical Properties of Isotopes.—Dr. F. A. 
Lindemann Ee Pe A ¥ Peer. ig 7 
The Green Flash.—Prof. Arthur Schuster, F.R.S. 8 
Hormones and Heredity.—J. T. Cunningham, 
31nd: Nera Gefen yee eam eh OES «ts! 
The Natural History Building of the United States 
National Museum, (///ustrated.)) . . ... 1.6. 9 
Duty-free Alcohol for Scientific Purposes .... II 
Meteorology-andithe VWiarys ye seiels =~) cee 
INKOCES: aloh is, Okra sd SO DMMEOEaO cs 2 LE 
Our Astronomical Column :— 
The Return of Metcalf’s @omet? ...... . 2 07, 
The Canadian 72-inch Reflecting Telescope . ... . 17 
Anomalous Dispersion in the Sun Deroy co 7 
Great Detonating Fireball in South Africa .) easly, 
Professional Chemists and the War. By Prof. 
Raphael’ Meldolay FoRSS3iee eos... ee 
Lord Kelvin’s Work on Gyrostatics.  (J//ustrated.) 
By Prof. A. Gray, F.R.S.. . ed Sot Se 19 
University and Educational Intelligence. . Bc, es} 
SocietiesjandAtcademicsi men cent t-)  nee 
Books Received AS 5, Sit EOP OCR) he! 
Diary of Societies . . A te AN 2 iff} 


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