552 
NATURE 
[APRIL 7, 1904 
that the crystallisation of quartz in a volcanic magma does 
not necessarily require a great depth, and that the conditions 
regarding pressure, apparently indispensable for the mineral- 
ising action of steam, may be realised near the surface, as 
in the dome of Mont Pelée.—M. Guichard was elected a 
correspondant for the section of geometry in the place of 
M. Lipschitz.—On the possibility of showing, by a contrast 
phenomenon, the objective action of the n-rays on luminous 
calcium sulphide: J. Macé de Lépinay. M. Blondlot has 
shown that whilst the luminosity of the phosphorescent 
surface when the rays strike it at nearly normal incidence 
iS increased, it is diminished when the angle of incidence is 
very oblique. Advantage is taken of this, two screens 
being arranged, the one vertical and the other nearly hori- 
zontal, the intensity and angle being adjusted so that in the 
absence of the n-rays the two appear exactly alike. Under 
the influence of the rays, the one increases and the other 
decreases in luminous intensity, the contrast of the two 
rendering the effect more striking.—On the applications of 
the diastoloscope to the study of the displacements of 
luminous objects: C. Chabrié.—On osmosis, a reply to 
M. A. Ponsot : A. Guillemin.—The factors of equilibrium, 
capillary pressure and gravity: A. Ponsot. Some applica- 
tions of the phase rule.—On the properties of curves re- 
presenting indifferent states: A. Ariés.—On the coagulation 
of colloidal solutions : Jacques Duclaux.—The separation of 
chromium and vanadium: Paul Nicolardot. The separ- 
ation is effected by the formation of chlorochromic acid by 
the action of fuming sulphuric acid in the presence of a 
chloride.—The preparation of ether oxides by means of 
magnesium compounds and halogen methyl ethers, 
XCH,OR: l’Abbé J. Hamonet. Bromo-methyl ethers are 
readily acted upon by allyl-magnesium compounds, giving 
higher homologues of the ethers. Methyl benzyl, amyl 
propyl, and phenyl-ethyl methyl ethers have been prepared 
in this way, the yields being very good.—On nitrogen 
phosphorus bases of the type (RNH),P.NC,H, : P. Lemoult. 
—The application of acetylene gas to the heating of an 
incubator by means of an automatic temperature regulator : 
H. Joffrin.—New observations on the diastatic formation 
of amylocellulose : A. Fernbach and J. Wolff.—Cephalisa- 
tion in the annelids and the question of metamerism: 
A. Malaquin.—On the morphology of the trypanoplasma 
of Phoxinus Laevis : Louis Léger.—The subterranean fauna 
of the caves of Padirac: Armand Viré.—The endophytic 
fungus of orchids: Noel Bernard. In a previous paper the 
author has shown that a fungus is necessary in the fertilisa- 
tion of a particular species of orchid, and an endophytic 
fungus, morphologically identical, has now been isolated 
from other species of orchids of diverse origin.—On the 
earthquakes of Roumania and Bessarabia: F. de Montessus 
de Ballore.—The emission of the n-rays in phenomena of 
inhibition: Augustin Charpentier and Edouard Meyer.— 
On the origin of lactose. Experimental researches on the 
ablation of the mammary glands: Ch. Porcher.—The 
resistance of rats to arsenical poisoning: F. Bordan. Rats 
can support doses of arsenic three times greater than those 
recognised as being fatal to man. They are more susceptible 
to small daily doses.—The action of formic acid on the 
organism: L. Garrigue. 
DIARY OF SOCIETIES. 
THURSDAY, Apri 7. 
LinnEAN Society, at 8.—The Morphology and Anatomy of the Stem 
of the Genus Lycopodium : C. E. Jones. 
RONTGEN SOCIETY, at 8.30.—Exhibition Evening. 
FRIDAY, Apriv 8. 
Grovoaists' AssociaTION, at 8.—Onthe Metamorphism of Sediments : 
G. Barrow. 
MALACOLOGICAL Society, at 8.—Description of apparently New Species 
-of Corbicula, Melania, Vivipara and Lagochilus from Java: Rev. R. 
Ashington Bullen.—The Hawaiian species of Opeas: E. R. Sykes.—On 
some Non-marine Hawaiian Mollusca: C. F. Ancey.—Description of 
a New Species of Ancilla from New Zealand: Rev. W. H. Webster.— 
Report on a Small Collection of Helicoids from British New Guinea, 
with Description of a New Species: G. K. Gude. 
TRaie ASTRONOMICAL SociETy, at 5.—Milky Way Charts of the Heavens 
on Argelander’s Scale 1°=20mm. ; with Description of the Lenses and 
Mounting by H. Dennis Taylor and Alfred Taylor : J. Franklin Adams. 
—Observations of the Minor Planet (324) Bamberga at Windsor, 
-N. S. Wales: John Tebbutt.—Corrected Continuation of Briinnow’s 
““Tafeln der Flora”: A. M. W. Downing.—Note on Elliptic Motion: 
Asaph Hall.—The Rousdon V ariable Star Observations: H. H. Turner. 
—Measures of the Double Stars in Struve's ‘‘ Mensur Micrometricz,” 
collected and discussed: Thomas Lewis. 
NO. 1797, VOL. 69| 
MONDAY, Aprit 11. 
Society or CHEmIcat INpusTRY, at 8.—The Volatilisation of Lead Oxide 
from Lead Glazes into the Atmosphere of a China Glost Saggar and its 
Effect upon the Leadless Glaze Ware in the same Saggar : W. Thomason. 
—The Preparation of Lead Glazes of Low Solubility and some Points to 
be Observed in the Process: W. A. Thomason.—The Action of certain 
Solutions upon Aluminium and Zinc : Watson Smith. 
ARISTOTELIAN SociETy, at 8.—The Emotional Origin and the Assumed 
Objectivity of Moral Judgments : Dr. Edward Westermarck. 
Wicronts INSTITUTE, at 4.30.—The Conception of the Great Reality: 
lein. 
TUESDAY, Apri 12. 
Rovat InstTiTuTION, at 5.—The Transformation of Animals : 
Miall, F.R.S. 
INSTITUTION OF CiviL ENGINEERS, at 8.—Recent Developments in Cargo 
and Intermediate Steamers : Edwin W. de Rusett. 
WEDNESDAY, Aprit 13. 
Society oF Pusiic ANALysTs, at 8.—The Microscopic Examination of 
Metals (Illustrated ‘by Lantern Slides): J. H. B. Jenkins and D. G. 
Riddick.—Cod Liver Oil and other Fish Oils: J. F. Liverseege.—Note 
on Mushroom Ketchup: J. F. Liverseege. 
GeoLocicaLt Society, at 8.—On the Discovery of Human Remains 
beneath the Stalagmite Floor of Gough’s Cavern, near Cheddar: H. N. 
Davies.—The History of Volcanic Action in the Phlegraan Fields: Prof. 
Giuseppe de Lorenzo! 
THURSDAY, Apri 14. 
Roya. INSTITUTION, at 5.—Dissociation: Prof. Dewar, F.R.S. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—Direct Reading Measur- 
ing Instruments for Switchboard Use: K. Edgcumbe and F. Punga. 
(Continuation of discussion.)—Eddy Currents and Eddy Current Losses 
in Cable Sheaths: M. B. Field. 
MATHEMATICAL SociETY, at 5.30.—On a Plane Quintic Curve: 
Dr. F. Morley.—Mathematical Analysis of Wave-propagation in 
Isotropic Space of 4 Dimensions: H. T. Havelock.—On Functions 
Generated by Linear Difference Equations of the First Order: Rey. E. 
W. Barnes.—Note in Addition to a Former Paper on Conditionally Con- 
vergent Multiple Series: G. H. Hardy.—Spherical Curves. Part II: 
H. Hilton.—Perpetuant Syzygies of Degree Four : P. W. Wood.—Trans- 
formations of the function F({a] [81 [y] 7): Rev. F. H. Jackson. 
FRIDAY, Apri 15. 
Rovav INSTITUTION, at 9.—Korea and the Koreans: Rt. 
the Count Vay de Vaya and Luskod. 
INSTITUTION OF MECHANICAL ENGINEERS, at 8.—D*éscussion < 
Locomotives in France: M. Edouard Sauvage. 
Prof. L. C. 
Rev. Msgr. 
Compound 
CONTENTS. PAGE 
Colouring Matters, Artificialand Natural. By Prof. 
R. Meldola, F.R-S. aa 1 ot cei 
The Malay Fauna. By Roles LO 
Firm Foundations, By R. NVivHs Ts bigs pie 6 Se 
Our Book Shelf :— 
Sprigge, Doak, Hudson and Cox: ‘‘Stars and 
Sextants.”—Commander Vansittart Howard . 532 
Buchetti: ‘‘ Engine Tests and Boiler Efficiencies.” — 
N. J. L. ofa dh ves SO BS 
Tickeil : An English Grammar ” = 532 
Snyder : ‘‘ The Chemistry of Plant and "Animal Life” 533 
Letters to the Editor :— 
A New Mineral from Ceylon.—Sir William 
Ramsay, K.C.B., F.R.S. 533 
The Blondlot or z- Rays. —Prof, John G. McKen- 
drick, F.R.S., and Walter Colquhoun. . . . 534 
Learned: Societies. —Prof. G. H. Bryan, F.R.S.. 534 
Euclid’s Definition of a Straight Line.—Prof. J. D. 
Everett, F.R.S.: . 535 
Spawning of the Plaice. —Dr.T. Wemyss Fulton . 535 
Fossil ‘‘ Rain-drops.”—Rev. E. C. Spicer .. . 535 
The Use of Light and other Radiations in the 
Treatmentiof Diseases) a.) a eS 
Imperial Meteorology .. PCE co Sy 
Laboratories for Botanical Research . so RS SS 
Notes : 539 
Our Astronomical Column :— 
Observations of Eros . . Prien. Ge sty SY 
Orbit of the Minor Planet Chicago (334) 5 j20 542 
Absorption in the Solar Atmosphere. . . .... 543 
Wave-Length of the Green Cadmium Line. . . . . 543 
AgBuehtiNeteor se. = (=< -) @ ta neem anemone 
Spectra of Mixed Gases . . . oo 543) 
Return of the National Antarctic Expedition © Seno 4S 
University Education in South Africa ..... 544 
Theory of Amphoteric Electrolytes. By Prof. 
James Walker, F.R.S. . . wer 545 
Survey of Scottish Lakes. (IMustrated.) | 7 0-5 546 
The Hope Reports. ByS. J. H. . 549 
University and Educational Intelligence Percececion sy) 
Societies|and¥Academies © 7) 9204 erie 5a 
DiaryiofiSocietiesr (. %<. .. 2 (3 so iii alee cnon mem 
