418 

NATURE 
[JUNE 10, 1915 

Red Books of the British Fire Prevention Com- 
mittee. No. 189. Pp. 38. (London: British Fire 
Prevention Committee.) 3s. 6d. 
Fifty-third Annual Report of the Secretary of the 
State Board of Agriculture of the State of Michigan, 
and Twenty-seventh Annual Report of the Experiment 
Station, from July 1, 1913, to June 30, 1914. Pp. 559. 
(Lancing, Michigan: Wynkoop, Hallenbeck, Craw- 
ford Co.) 
Library of Congress. Report of the Librarian of 
Congress, and Report of the Superintendent of the 
Library Building and Grounds, for the Fiscal Year 
ending June 30, 1914. Pp. 216. (Washington: 
Government Printing Office.) 
Library of Congress. A List of Geographical Atlases 
in the Library of Congress. Compiled under the 
direction of P. L. Phillips. Vol. iii. Pp. exxxvii+ 
1030. (Washington: Government Printing Office.) 
1.25 dollars. 
Contributions from the Princeton University Ob- 
servatory. No. iii.:. A Study of the Orbits of 
Eclipsing Binaries. By H. Shapley. Pp. xiv+176. 
(Princeton, N.J.: Observatory.) 
The Natural Theology of Evolution. 
Sherman. Pp. xv+288. (London: 
Unwin, Ltd.) ros. 6d. net. 
Materials of Construction: their Manufacture, 
Properties, and Uses. By Prof. A. P. Mills. Pp. 
xxi+682. (New York: J. Wiley and Sons, Inc.; 
London : Chapman and Hall, Ltd.) 19s. net. 
Constant-voltage Transmission. By H. B. Dwight. 
Pp. 115. (New York: J. Wiley and Sons, Inc.; 
London: Chapman and Hall, Ltd.) 5s. 6d. net. 
By ).eNe 
G. Allen and 

DIARY OF SOCIETIES. 
THURSDAY, June xo. 
RovaL InstiTUTION, at 3.—Method of Presenting Character in Biography 
and Fiction: Wilfrid Ward. 
Rovat GroGRapHIcaL Society, at 5.—The History of the Gradual 
Development of the Groundwork of Geographical Science : Sir Clements 
Markham. 
INSTITUTE OF ACTUARIES, at s.—Annual General Meeting. 
OpticaL Society, at 8.—Note on the Achromatism of a pair of separated 
Lenses: T. B. Vinycomb.—Optical Accessories: W. Salt.—Trial Frame 
Manipulation :—John H. Sutcliffe. 
FRIDAY, June 1x. 
Royat InstiTuTION, at 9.—Music and Poetry: Dr, H. W. Davies. 
Roya AsTRONOMICAL SociETy, at 5.—Methods of Determining the Tilt of 
Photographic Plates: R. J. Pocock.—The Form of a Rotating Fluid 
Mass as Disturbed by a Satellite: H. Glauert.—Note on Errors of 
Measurement: H. C. Plummer.—The Rotation Period of Neptune: 
M. Hall.—Protable Paper: Determinations of Stellar Parallax made at 
the Royal Observatory, Greenwich: Communicated by the Astronomer 
oyal. 
Puysicat Society, at 8.—The Coefficient. of Expansion of Sodium : 
E. A. Griffiths and E. Griffiths.—(1) Notes on the Calculation of Thin 
Objectives : (2) On Tracing Rays through an Optica! System: ‘1. Smith. 
—The Accuracy of the Lens and Drop Method of Measuring Refractive 
Index: H. Redmayne Nettleton. : 
MONDAY, June 14. 
Roya GkoGRAPHICAL Society, at 8.30.—Expedition to the Karakoram 
and Eastern Turkestan: Dr. Filippo de Filippi. 
TUESDAY, June 15. 
ROYAL STATISTICAL SocIETY, at 5.—Annual General Meeting. At. 5.15.— 
The Multiplier ‘and Capital Wealth: B. Mallet and H- C. Strutt. 
MINERALOGICAL SOCIETY, at 5.30.-—Detrital Andalusite in Cretaceous and 
Eocene Sands: G. M. Davies.—The Garnets and Streaky Rocks of the 
English Lake District : J. F. N. Green.—The Errors in'the Angle of the 
Optic Axes Resulting from those of the Principal Refractive Indices 
Determined by Total Reflection: Dr. S. Kézu.—The Meteoric Stones of 
Warbreccan, Queensland: Dr. G. T. Prior.—Autunite : A. F. Hallimond. 
NO. 2380, VOL. 95] 

WEDNESDAY, June 16. 
Rovat METEoROLOGICAL Society, at 4.30.—Discontinuities in Meteéoro- 
logical Phenomena: Prof, H. H. Turner.—Battle Weather in Western 
Europe, 9 months August, 1914, to April, rgr= : C. Harding. 
THURSDAY, June 17. 
Royat Society, at 4.39.—Prolable Papers: Analyses of Agricultural Yield~ 
II. The Sowing-date Experiment with Egyptian Cotton, 1913: W. L. Balls 
and F. S. Holron.—Soil Protozoa and Soil Bacteria: E. J. Russell.—The 
Enhanced Series of Lines in Spectra of the Alkaline Earths: Prof. W. M. 
Hicks.—On Certain Linear Differential Equations of Astronomical 
Interest: Prof. H. F. Baker.—The Partial Correlation-Ratio: Prof. 
Karl Pearson.—The Effect of Temperature on the Hissing of Water when 
flowing through a Constricted Tube: S. Skinner and F. Entwistle.-—And 
other papers. 

CONTENTS. 
By G. .FevDE iiss) eet Sen 
By Wee Bonne 
Mathematical Principles and Practice. By D. B, M. 
GurpBookshelf < . . ..\ )Usia) Remote 
Letters to the Editor :— 
The Continuous Spectra of Gases. —Prof, E. Pi'Lewis 
The Relation between Chromosomes and Sex- 
determination in ‘‘ Abraxas grossulariata.”—Dr. 
Keonard Doncaster, FiRISH). 3. 2 eee 
Cavities due to Pyrites in Magnesium Limestone. 
(4llustrated.)—George Abbott ..- . 2)... ° 
Poisonous Gases in Warfare and their Antidotes, 
(Zilustrated.) By Sir W. A. Tilden, F.R.S. ... 
Wasibilityis oBy.C..C; Paterson) tm eanmoue si te-meinen 
Olfactory Structures in Insects?) 27.) 293). 0 Sse 
Sir A. H. Church, K.C.V.0., F.R.S. By A. P.L.. 
INOUGE) 7! oo SOeMEROUREREA RIO? ¢ 0-9 6 
School Science, 
Practical Plant Physiology. 
Our Astronomical Column :— 
Parallaxes of Four Visual Binaries. . ....... 
Abnormal Variability of Mira Ceti ........ 
Report of the Bombay and Alibag Observatories. 
The Annual of the National Observatory of Rio de 
IFaneirOw tm ar oie 
Agricultural Research at the Rothamsted Experi- 
mental Station. ..... 
By N. R.C. 
By G. A. J. C. 
The Royal Observatory, Greenwich. . 
Presentation to Sir Philip Magnus . 
The Universities and Investigation. 
Economic Geology of Navanagar. 
Radio-Therapy: Its Scientific Basis and its Teach- 
eae 13h7 IES EM AMC ADM soo Ap oo 4 2 a 5 
Library Provision and’ Policy cmees tt eee 
University and Educational Intelligence ..... 
Societies and Academies Pee Sheahan Repererec-O 
Books Received 
Diaryyjofisocieties) .. .. <i) aaeaenemeen oun eieennS 


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