576 
three tables giving the sun-spots, their distribution in lati- 
tude, and the distribution of the faculz in latitude.—On 
a class of multiform transcendentals: Pierre Boutroux.— 
The polaristrobometrograph, or a_ self-registering polari- 
meter: Gaston Gaillard. In order to follow the rate of 
chemical reactions accompanied by a change in the rotatory 
power, a combination of a Laurent polarimeter and kine- 
matograph was designed, capable of giving from five to ten 
images per second, details of which are given.—On the 
satellite rays in the spectrum of cadmium: Ch. Fabry. A 
close examination of the cadmium ray 508-6, by the inter- 
ference method previously described by the author, shows 
that in a tube without electrodes there are three rays, very 
close together, with intensities of the same order. In a 
tube fitted with electrodes the middle ray is very intense, 
the second is much enfeebled in intensity, the third being 
absent. The necessary condition for the clear appearance 
of the satellite rays is the absolute purity of the luminous 
gas, this condition being more easily fulfilled in tubes not 
fitted with electrodes.—On the structure and affinities of 
trypanoplasma: Louis Léger.—On the anomalous values 
of gravity in the eastern region of Etna: Gaetano Platania. 
—The geological constitution of the massif of Khakhadian 
(Soudan): H. Arsandaux. This part of Africa is com- 
posed of sedimentary rocks of unknown age, probably old, 
containing andesite tufas of volcanic origin; they are 
traversed by eruptive rocks of a varied nature, especially 
by granite.—On the origin of lactose. Urological re- 
searches during pregnancy: Ch. Porcher and M. Com- 
mandeur.—On the origin of precipitines: R. Kraus and 
C. Levaditi. The conclusion is drawn that the precipitines 
are made by the white corpuscles of the blood, the latter 
being probably the principal source of these anti-bodies. 
DIARY OF SOCIETIES. | 
THURSDAY, ApRIL 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 SociE1y, at 5.30-—On a Plane Quintic Curve: 
Dr. F. Morley.—Mathematical Analysis of Wave-propagation in 
Isotropic Space of # Dimensions: H. T. Havelock.—On Functions 
Generated by Linear Difference Equations of the First Order: Rev. 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] [8] [y] +): Rev. F. H. Jackson.—An 
Extension of Sylow’s Theorem: Prof. G. A. Miller.—Note on a System 
of Linear Congruences: Rev. J. Cullen.—The Extension of Neumann's 
Addition Theorem for Bessel Functions : Rev. F. H. Jackson. 
FRIDAY, APRIL 15- 
Roya. InstTITUTION, at 9.—Korea and the Koreans: Rt. Rev. Msgr. 
the Count Vay de Vaya and Luskod. 
InsTITUTION OF MECHANICAL ENGINEERS, at 8.—Déscussion : Compound 
Locomotives in France: M. Edouard Sauvage. 
SATURDAY, Arrit 16. 
Essex Frecp Crus, at 6.30 (at the Essex Museum of Natural History, 
Stratford).—Annual Meeting.—The Natural History of Pyrites and 
Gypsum, the Chief Minerals of Essex: F. W. Rudler.—On the Origin of 
the term ** Sarsen Stones”: T. V. Holmes. 
MONDAY, Apri 18. 
SocioLocicaL SocireTy. at s.—Woman in Early Civilisation: Dr. E. 
Westermarck, 
TUESDAY, Arvriv 19. 
Rovat InsTITUTION, at 5.—The Transformations of Animals: Prof. L. C. 
Miall, F.R.S. 
ZoorocicaL Society, at 8.30.—On Mammals collected during the 
Uganda Boundary Commission by Mr. W. G. Doggett: Oldfield 
Thomas, F.R.S., and H. Schwann.—Contributions to the Anatomy of 
the Lacertilia. II. On some Points in the Structure of Tupinambis: 
F. E. Beddard, F.R.S.—On the Disposition and Morphology of the 
Intestinal Coils in Mammals: Dr. P. Chalmers Mitche!l.—On the 
Characters and Affinities of the Triassic Reptile, Zederpeton elginense: 
G. A. Boulenger, F.R.S.—Descriptions of some New Species of Butter- 
flies belonging to the family Erycinide from Tropical South America: 
H. Druce. 
Society oF Arts, at 8.—The Sentiment of Decoration: A. East. 
Roya SraTisTicAt Society, at 5.—Five Years’ Experience of the 
Effect of the Workmen’s Compensation Acts, with Especial Reference to 
Schemes Certified Thereunder : W. H. Tozer. 
InsT1ITUTION OF CIVIL ENGINEERS, at 8.—Aérial Suspension Cableways : 
J. M. Henderson. 
WEDNESDAY, Apri 20. 
Society oF Arts, at 8.—Motor Cars for Popular Use: 
O'Gorman. . 
Royat Microscopicat Society, at §.—Exhibition of Pond Life. 
EntTomoocicaL Society, at 8.—Nature’s Protection ‘of Insect Life, 
illustrated by Colour Photography: F. Enock.—Discussion; On 
Specimens of the Dipterous Families Stratiomyide to Cyrtide: G. H. 
Verrall, Colonel Yerbury, and others. 
NO. 1798, VOL. 69] 
Mervyn 
NATURE 
[APRIL 14, 1904 
RovaL METEOROLOGICAL SociETY, at 7.30.—The Variation of the 
Population of India compared with the Variation of Rainfall in the 
Decennium 1891-1901: W. L. Dallas.—The Cause of Autumn Mists : 
J. B. Cohen. 
CHemicaL Society, at 5.30—(1) The Vapour Density of Hydrazine 
Hydrate; (2) The Combining Volumes of Carbon Monoxide and 
Oxygen : A. Scott.—(1) Ammoniacal Double Chromates and Molybdates 5 
(2) Double Chromates of the Series M2M(CrO4)o6H20 Magnesium 
and Nickel Compounds: S. H. C. Briggs.—Experiments on the 
Synthesis of the Terpenes. Part I. Synthesis of Inactive Terpineol, of 
Dipentene and of ‘Yerpin Hydrate: W. H. Perkin, junr.—A Lzvo- 
rotatory Modification of Quercitol : F. B. Power and F. Tutin.—The 
Constituents of the Essential Oil of Californian Laurel: F. B. Power and 
F. H. Lees.—Some Derivatives of Umbellulone: F. H. Lees. 
THURSDAY, Aprit 21. 
Royat INSTITUTION, at 5.—Dissociation: Prof. Dewar, F.R.S. 
LinnEAN Society, at 8.—On British Freshwater Rhizopoda: J. Cash.— 
Exhibitions: Drawings by Mrs. C. Reid of Fruits and Seeds of British 
pre-Glacial and inter-Glacial Plants. II. Calyciflora:: Clement Reid, 
F.R.S.—Holograph Letter of Linnzus to Haller, dated from Upsala, 
May 12, 1747: R. Morton Middleton. 
InsTITUTION oF CiviL ENGINEERS, at 8.—‘‘ James Forrest" Lecture : 
Internal Combustion Engines : Dugald Clerk. 
FRIDAY, Apriv 22. 
Royvat INSTITUTION, at 9.—Sleeping Sickness 
David Bruce, F.R.S. e 
PuysicaL Society, at 5.—Calculation of Colours for Colour Senseto- 
meters and the Illumination of ‘“‘ Three Colour” Photographic Trans- 
parencies by Spectrum Colours: Sir W. de W. Abney, F.R.S.—On 
Normal Pileing as connected with Osborne Reynolds's Theory of the 
Universe : Prof. J. D. Everett, F.R.S.—Note on the Diffraction Theory 
of the Microscope as applied to the Case when the Object is in Motion: 
Dr. R. T. Glazebrook, F.R.S. 
INsTITUTION OF CiviL ENGINEERS, at 8.—No. 2 River-pier of the Beckton 
Gasworks: A. Trewby. 
in Uganda: Colonel 
CONTENTS. PAGE 
The Metallography of the Allotropic School. By 
Profe|-Omwarmold 2s een 553 
Zoological Essays. By J. A. T. 554 
Infection and Immunity 55 556 
Physiological Chemistry 557 
Our Book Shelf :— 
Mendeléeff : ‘‘ An Attempt towards a Chemical Con- 
ception ofthe Ether.”—J. Ie. 2 8 septs 558 
Kahlbaum : ‘‘ Monographieen aus der Geschichte der 
Chemica oe. <n eee ok colt eS 
“De Vi Physica et Imbecillitate Darwiniana disputavit 
Franciscus Gulielmus Bain, Artium Magister.”— 
yy ID. gn Bile Go 55 Be 558 
‘* Bray and Environs.” —G, A. J. C. : 559 
Buchanan: ‘‘Senior Country Reader”. . . . . . 559 
Letters to the Editor :— 
A New Mineral from Ceylon.—Sir William 
Ramsay, K.C.B., F.R.S. ; Dr. T. A. Henry 559 
Attraction between Concentric | Hemispherical 
Shells.—George W. Walker; Prof. A. Gray, 
UP Oe OECD a owonobae sc. o SED 
Curious Formation of Coal.—Capt. F. W. Hutton, 
1 Ch So OME clo Goo vco-oo 6c o Hee 
Photographic Effect of Radium Rays.—Prof. Henry 
Stroud 212)... «1. ena eee mes OG) 
On the Measurement of Certain very Short Intervals 
of Time. By Lord Rayleigh, O.M., F.R.S. . . 560 
Entropy. By Prof. John Perry, FSR’S, .. - . 2 3) 561 
Agricultural Education and Researchin India . . 564 
NGtesmaee arene cmi nent ab) ORO ee eee 564 
Our Astronomical Column :— 
The Greenwich Section of the Astrographic Catalogue 568 
The Computation of Elements for an Annular Eclipse 568 
Rapid Changes ina Sun-spot. .......... 568 
Photographic Observations of Borrelly’s Comet (1903 c) 568 
The Evolution of Empire. By Sir John A. Cock- 
burn, K.C.M.G._ . ns) el) ee ee 568 
A Botanical Laboratory in the Desert. (Jl//ustrated.) 
By Prof. Percy Groom . RPE er i auonicecns. Lie) 
Fireballs Visible in the Spring Months, By W. F. 
Denning >) DP Pse so as ofc Sl 
SeismologicaljNotes’. . . . . 2 =) Galasso 
Chloroform/Anzesthesia.:.. .) 5 -ts joe een aes 572 
The First International Congress for School 
Le OY RNY. 5) Oe oe oO eg Co oc S28 
University and Educational Intelligence ..... 572 
SocietiesiandvAcademies . 2°) 35%) 3) 40-78 
Diary/ofiSocieties| 1. . . cceuetiecicnian mcuieme S70) 
