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(London : 
DIARY OF SOCIETIES. 
THURSDAY, May 9. 
Royat Society, at 4.30.—On the Variation with Temperature of the 
Rate of a Chemical Change, with an Appendix by Prof. W. Esson, 
F.R.S.: A. Vernon Harcourt, F.R.S.— Some Phenomena of Sun- 
spots, end of Terrestrial Magnetism : Dr. C. Chree, F.R.S.—On the 
Ultimate Lines and the Quantities of the Elements producing the Lines 
in Spectra of the Oxyhydrogen Flame and Spark: Sir W. N. Hartley, 
F.R.S., and H. W. Moss.—The Transformations of the Active Deposit 
of Thorium: E. Marsden and ©. G Darwin.—On the £ Particles 
Reflected by Sheets of Matter of Different Thicknesses : W. Wilson. 
Rovat InstituTIon, at 3.—Recent Explorations in the Canadian Rocky 
Mountains: Prof. J. Norman Collie, F.R.S. 
INsTITUTION OF ELECTRICAL ENGINEFRS, at 7-30.—The Behaviour of 
D.C. Watt-hour Meters, more especially for Traction Loads: S. W. 
Melsom and H, Eastland.—Electric Meters on Variable Loads: Prof. D. 
Robertson. 
FRIDAY, May xo. 
Roya AstronomicaL Society, at 5.—Radiant Points of Shooting Stars: 
1899-1911: W. F. Denning. ‘—Publication of Heliocentric Places of 
Planets: Nautical Almanac Office.—The Solar Eclipse of 1912, April 
16-17: Rev. W Sidgreaves and Rev, A. J. Cortie; G. J. Newbegin; 
Rey. C. D. P. Davies.—Spectroscopic Observations during the Eclipse of 
1912, April 16-17; A. Fowler.—Measures of Southern Binary Stars in 
NO. 2219, VOL. 89] 
NATURE 
[May 9, 1912 
i9rr: J. Tebbutt.—Stellar Photometry by Focal Displacement : Maxwell 
Hall.—Preliminary Observations of Spiral Nebula in Polarised Light > 
J. H. Reynolds.—On the Motions and Distances of Certain Stars of Types 
B8 and Bg : H. C. Plummer.—P7obable Papers: The Effect of Magnetism 
on the Rates of Chronometers and Watches : S. Chapman and T. Lewis., 
—Positions of the Sun’s Axis as Determined from Photoekaphsy 1874-1011, 
Measured at the Royal Observatory, Greenwich: F. ryson and 
E. W. Maunder.—Constitution of the Solar Corona. ie Jen Wa 
Nicholson.— Observations of the Partial Solar Eclipse of 1912, April 16-17, 
at the Radcliffe Observatory, Oxford: A. A. Rambaut.—Note on the 
Appearance of the Corona of 1912, April 17: J. H. Worthington.— 
Prof. Lowell will be present, and give an account of the Spectroscopic 
Discovery of the Rotation of Uranus at the Lowell Observatory. 
Royat InstiTuTion, at 9.—The Gaumont Speaking Kinematograph Films > 
Prof. W. Stirling. 
MALAcoLocicat Society, at 8.—A Synopsis of the Recent and Tertiary 
Fresh-water Mollusca of the Californian Province : Harold Hannibal.—On 
Dosinia lucinalis, Lam., and ics Synonyms: A. J. Jukes-Browne, F.R.S. 
—New Generic Names and New Species of Marine Mollusca : T. Iredale., 
Puysicar. Society, at §.—A Method of Measuring Small Inductances : S. 
Butterworth.—The Conversion of Starch into Dextrin by X-Rays: H. A. 
Colwell and Dr. S. Russ. —Demonstration of Apparatus for. showing the 
Generation of Electricity by Carbon at High Temperatures: Dr. J. A. 
Harker and Dr. G. W. C. Kaye.—Calibration of Wave-meters for Radio- 
telegraphy : Prof. G. W. O. Howe. 
InstituTE oF Merats, at 8.30.—The Inner Structure of Simple Metals = 
Sir J. A. Ewing, K.C. B. ap NESSES. 
MONDAY, May 13. 
Arts, at 8.—Heavy Oil Engines: 
TUESDAY, May 14. 
ES Ae ea aD at 3.—The Study of Genetics: 
E.R 
Roya Society oF Captain H. R. 
Sankey, R.E. 
Prof. W. Bateson, 
WEDNESDAY, May 1s. 
GEOLOGICAL Society, at 8. 
Royvat METEOROLOGICAL SOCIETY, at 4.30. 
Roya Society oF Arts, at 8.—The Manufacture of Nitrates from the 
Atmosphere : E. K. Scott. ‘ 
Royat Microscopicat Society, at §.—British Enchytraids. 1V. The 
Genus Henlia: Rev. Hilderic Friend. 
THURSDAY, May 16. 
Royat Society, at 4.30.—Probable Papers: (1) The General Theory of 
Colloidal Solutions ; (2) The Tension of Composite Fluid Surfaces and the 
Mechanical Stability of Films of Fluid; (3) On the Formation of a Heat- 
reversible Gel: W. B. Hardy, F-R.S. ~G) Studies on Enzyme Action. 
XVI. The Enzymes of Emulsin. II. Prunase, the correlate of Prunasin > 
(2) Studies on Enzyme Action. XVII. Enzymes of the Emulsin Type. 
Il. The Distribution of B-enzymes in Plants: Prof. H. E. Armstrong, 
F.R.S., E. F. Armstrong, and E. Horton.—Studies on Enzyme Action. 
XVIII. Enzymesof the Emulsin Type. ITI. Linase and other Enzymes 
in Linacez : Prof. H. E. Armstrong, F.R.S., and J. V. Eyre.—Reflex 
Rhythm Induced by Concurrent Excitation and Inhibition : Dr. Alexander 
Forbes.—The Factors in Rhythmic Activity of the Nervous System: 
T. Graham Brown. 
Roya InstiruTIoN, at 3.—Ice Formation in Canada. I. The Physical 
Aspect: Prof. H. T. Barnes, F.R.S. 
INSTITUTION OF MINING AND METALIURGY, at 8. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 7.45.—Annual General Meet- 
ing.—At 8.30.—Condensers in Series with Metal Filament Lamps: A. W. 
Ashton. 
Roya. Society oF Arts, at 4.30.—Indian Railways : 
FRIDAY, May 17. 
Roya InsTITUTION, ato.—High Frequency Currents: W. Duddell, F.R.S. 
Neville Priestley. 
CONTENTS. PAGE 
Medical Morphology. By A. K. > (shoe) Dee 
History of Determinants. By G. B. AVE, 2 eae 237 
Chemistry of Cellulose . . Mere eek 
An Astronomical Poet. By Dr. if K ‘Fotheringham 239 
Our Bookshelf . . 3 Giese S525 See 
Letters to the Editor :— 
The Solar Eclipse of ooo 17.—_J. Y. Buchanan, 
RS 241 
The Distastefulness of Anasia flexipous. —A. M. 
Banta; R_ I. Pocock, F.R.S Guc Bike 
Clouds and Shadows. —Dr. T.C. Porter... 244. 
The Royal Academy and Nature-study. By Dr. 
William J. S. Lockyer . . - 244 
International Association of Chemical Societies . - 245 
Meson Gray...) 2 gee + aaa 
Notes: :. . . Hee... SaaS 
Our Astronomical Column :— 
ASBrilliant: Meteor > - 2 Saeki) re, eee 
Nova Geminorum, No. 2 . SiN Oe 250 
Faint Stars with Large Proper Motions PALES 250 
Solar Prominences in. 1910. . oY EN Cog 2Qe 
The) Eclipse of the Sun, Aprilgge. 4°. = 4 a coe 
Matter and Mind .. . Nea. E . Seat 
Aerial Flight. (Ulustrated.) By H. R. A. Mallock, 
BRS Hc. «| eee 
University and Educational Intelligence peo s | -5y 
Societiesiand’ Academies . “a5 7.5: - / 2 3 25s 
BookspRleceived . .: «2: Si Seeameebes src cy inare eee 
Diaryrof Societies)...» .. eNews: umes 
