168 
NATURE 
[JUNE 12, 1902 
combustion engines is regarded as a linear function of the power 
of the engine. Considerations deduced from this formula were 
applied to the discussion of the relative merits of alcohol motors 
at a recent competition.—On the specific inductive capacity of 
dielectrics at low temperatures, by MM. Jacques Curie and P. 
Compan. The soakage effects in glass tend to disappear at low 
temperatures. _ The dielectric capacity varies as a linear function 
of the temperature, the teraperature coefficient being determined 
for glass, ebonite, mica and quartz.—The influence of the 
voltage in the formation of ozone, by M. A. Chassy. When the 
voltage is sufficiently high for the discharge to take place, the 
production of ozone is proportional to the square of the 
difference of potential which exists between the armatures. — 
Contribution to the study of the magnesium light. Measure- 
ment of the speed of combustion and the chronophotography of 
the light, by M. Albert Londe. It has usually been considered 
that the average time of exposure in taking a photograph by 
means of a magnesium flash light powder was of the order of 
1/100 of a second. Exact measurements, however, have shown 
that the time is much slower, varying from } to 1/25 of a second 
and averaging 1/10 of asecond. This time is too great to 
permit of photographs of rapidly moving objects being made in 
this way.—Stereoscopic examination in radiology, and illusions 
in the appreciation of relief, by M. Th. Guilloz.—On the 
electrocapillary properties of organic bases and their salts, 
by M. Gouy.—Preparation of the anhydrous chlorides of 
samarium, yttrium and ytterbium, by M. Camille Matignon. 
The anhydrous chlorides of ytterbium and samarium 
were obtained for the first time by heating the hydrated 
salts in a current of hydrochloric acid gas.—Ammoniacal 
copper oxide, by M.  Bouzat. Starting from copper 
hydrate and ammonia, the cuprammoniacal base is formed 
with a slight disengagement of heat, the base formed being 
much stronger than ammonia,—The action of monochloraceto- 
acetic ester upon diazobenzene chlorides, by M. G. Favrel. 
The reaction is similar to that described by Japp and Klinge- 
mann for methylacetoacetic and ethylacetoacetic esters. The 
acetyl group is eliminated and hydrazones are formed.—On 
some salts of benzylamine, by M. René Dhommée. A descrip- 
tion of the preparation and properties of the nitrate, sulphate, 
borate, chromate, oxalate and benzoate of benzylamine.—On 
Staurosoma parasiticum:, by MM. M. Caullery and F. Mesnil. 
—Bacterial parasites of the intestine of the larvee of Chzvonomus 
plumosus, by M. Louis Léger.—The quantitative variations of 
plankton in the lake of Geneva, by M. Emile Yung. —On the 
presence of osseous tissue in certain fishes of the Palaeozoic strata 
of Canyon City, Colorado, by M. Leon Vaillant. In the fauna 
of these strata, which is one of the oldest known, not only are 
there undoubtedly vertebrates, but these were sufficiently 
advanced for the conjunctive tissue to have evolved up to a 
perfectly osseous state-—On the presence of the Lower 
Devonian in the Western Sahara, by M. G. B. M. Flamand.— 
On the seismic movements and magnetic disturbances at the 
commencement of May at the station of Uccle, Belgium, by 
M. Eug. Lagrange.—On the ashes from the eruptions of Mont 
Pelée in 1851 and 1902, by M. A. Lacroix. The products of 
the present eruption are different from those thrown out in 
1851.—On vaccination against plague, cholera and typhoid, by 
M. Besredka. 
DIARY OF SOCIETIES. 
THURSDAY, Jvne 12. 
Royat Society, at 4.30.—(1) The Influence of an Atmosphere of 
Oxygen on the Respiratory Exchange. (2) The Influence of High 
Pressure of Oxygen on the Circulation of the Blood: L. Hill, 
F.R.S., and J. J. R. Macleod.—On the Parasitism of Pseudomonas 
destructans (Potter): Prof. M. C. Potter.—On the Toxic Properties of 
the Saliva of certain ‘‘ Non-Poisonous”' Colubrines: Prof. A. Alcock, 
F.R.S., and Dr. L. Rogers.—The Dissipation of Energy by Electric 
Currents induced in an Iron Cylinder when Rotated in a Magnetic 
Field : Prof. E. Wilson. 
FRIDAY, JUNE 13. 
Roya ASTRONOMICAL SOCIETY, at 5.—Observations of Jupiter made at 
Mr. Crossley’s Observatory, r901r: J. Gledhill.—Further Observations 
of Nova Persei: A. Stanley Williams.—A Dark Reticle: C. S. Howe.— 
Ephemeris for Physical Observations of Mars, 1902-3: A. ‘CG. Di 
Crommelin.—On the Distribution of the Stars in the Cape Photographic 
Durchmusterung : A. M. W. Downing. —Reductions of Photographs of 
Swift's Comet (a 1899) taken at Cambridge Observatory with a Portrait 
Lens: L. N.G. Filon.—On the Principle of the Arithmetic Mean : H. C. 
Plummer. —Observations of the Total Eclipse of the Moon, 1902 April 22: 
Perth Observatory, Western Australia.—Probable paper :—Experi- 
mental Reduction of Photographs of Eros for the Determination of Solar 
Parallax, Second Paper: A. R. Hinks. 4 
NO. 1702, VOL. 66] 
MONDAY, June 16 
Royvat GroGRAPHICAL SociETY, at 8.30. Be act aera and Archxo- 
logical Explorations in Chinese Turkestan: Dr. M. A. Stein. 
TUESDAY, June 17. 
ZooLoaicaL Society, at 8.30.—Certain Habits of Animals traced in the 
Arrangement of their Hair : Dr. Walter Kidd.— On the Carpal Organ in 
the Female Hafalemur griseus: F. E. Beddard, F.R.S.—On some 
Points in the Anatomy of the Alimentary and Nervous Systems of the 
Pedipalpi: R. I. Pocock. 
Rovat SraTisTICAL SOCIETY, at 5. 
WEDNESDAY, June 18. 
Royat MerEorOLoGIcAL Sociery, at 4.30.—English Climatology, 1891 
1900: F. Campbell Bayard.—Earth Temperatures recorded in Upper 
India: W. L. Dallas. 
Roya Microscoricat Society, at 8.—The Genus Synchzta; A Mono- 
graphic Study with Description of Five New Species: C. F. Rousselet. 
CHEMICAL Society, at 5.30.—Elimination of a Nitro-group on Diazotiza- 
tion. _Dinitro-s- anisidine : R. Meldola and J. V. Eyre.—A New Type of 
Substituted Nitrogen Chlorides: F. D. Chattaway.—The Colour- 
changes exhibited by the Chlorides of Cobalt and some other Metals, 
from the Standpoint of the Theory of Electro-affinity: F. G. Donnan 
and H. Bassett, jun——An Accurate Method of determining the Com- 
pressibility of Vapours : B. D. Steele.—The Molecular Condition of 
Borax in Solution: H. S. Shelton.—Preliminary Notice of some New 
Derivatives of Pinene and. other Terpenes: W. A. Tilden and H. 
Burrows.—The Preparation of Pure Chlorine and its Behaviour towards 
Hydrogen: J. W. Mellor and E. J, Russell. 
THURSDAY, June 19. 
Royat. Sociery, at 4.30.—/? obable Papers :—On the Correlation between 
the Barometric Height at Stations on the Eastern Side of the Atlantic: 
Miss F. E. Cave-Browne-Cave and Prof. K. Pearson, F.R.S.—Note on 
the Effect of Mercury Vapour on the Spectrum of Helium: Prof. ie 
Norman Collie, F.R.S.—On Colour-physiology of the Higher Crustacea : 
F. W. Keeble and Dr. F. W. Gamble.—The Seed-Fungus of Lodium 
temulentum. L., the Darnel, or Poisonous Rye-grass: FE. M. Freeman.— 
On the Measurement of Temperature. Part I. On the Pressure 
Coefficients of Hydrogen and Helium at Constant Volume, and at 
different Initial Pressures: Dr. M. W ‘Travers and Dr. A. Jacquerod.— 
On the Measurement of ‘’emperature. Part 11. On the Vapour 
Pressures of Liquid Oxygen at Temperatures below its Boiling Point, 
and the Constant Volume Hydrogen and Helium Scales: Dr. M. W. 
Travers, G. Senter and Dr. A. Jacquerod.—On the Measurement of 
Temperature. Part 111. On the Vapour Pressures of Liquid Hydrogen 
at Temperatures below its Boiling Point on the Constant Volume 
Hydrogen and Helium Scales: Dr. M. W. Travers and Dr. A. 
Jacquerod. 
LINNEAN Society, at 8.—On Obesiella. a New Genus of Copepoda: 
Dr. W. G. Ridewood.—On Modern Methods in Mycology: Mr. G. 
Massee. —Further Observations on the Owls, especially their Skeleton: 
W. P. Pycraft. 
CONTENTS. PAGE 
The History of the Myth-making Age ...... 145 
Cyclopedia of Horticulture. . . Pere emrpere, (1/17) 
The Manufacture of Submarine Cables. .... . 148 
Our Book Shelf :— 
Semon : ‘‘Some Thoughts on the Principles of Local 
Treatment in Diseases of the Upper Air Passages.” 
—)> (CME oir oo olidha wm iceo u,b) 5 Hats" 
Buchenau : ‘‘ Flora der ostfriesischen Inseln” . . . 149 
Penrose: Occultations of Stars and Solar Eclipses’”’ . 149 
Willis: Algebra ®*.. <7; veymaiecencsiicu noah ciate = Matt am EL SD 
Letters to the Editor :— 
Earthquake in Guatemala. (With Map).—Edwin 
Rockstroh . . ora U8) 
The Vibration of the Violin.—W. B. Coventry AP pe Gf) 
The ‘‘ Armorl”’ Electro-Capillary Relay.—J.-S. . . 151 
Prehistoric Pygmies in Silesia. —David MacRitchie 151 
Flames from Mud on Sea-Shore.—Rev. H. T. 
Dion! |< 151 
Cuckoo’s Egg Threwn out of Bunting’ s Nest. aan G. 151 
Volcanic Eruptions in the West Indies. By Prof. 
Te vigine sk Ros... Gato 151 
Records and Results of Recent Eruptions Sued 153 
The New Botanical Laboratories at Liverpool. 
(Lilustiated) . . SCHORR MAR Oe HSE 
The Hugh Miller Centenary. Raphael Ao SK8 
Ieazarnisiiuchs. we By G. By Mice relocate SO 
GanlogRivan By A. G. 0 cfc lr coms ch eee nee 
Notes. (/élustrated). .. of se) Vee, O57, 
The Royal Observatory Visitation $e 161 
Evidence of a ‘‘ Seiche”’ on a Scottish Loch. (With 
Diagram). . 
The Mining Statistics of the World. ‘By B. H. B. 163 
University and Educational Intelligence . . . . 163 
Scientific Serials . . . PTS ois! ecm m a  2155 
Societies and Academies . Ae.oy Oh th SoC us) 
Dianyrote societies . }) Assasins «ce oct eee 
Sore 
