264 
NATURE 
[ JANUARY 14, 1904 
from five years’ observations: Teisserenc de Bort. A 
summary of results obtained from experiments with captive 
balloons at heights varying from 500 to 14,000 metres.— 
Differential characters of the physiological radiations 
according as their origin is muscular or nervous: Augustin 
Charpentier. The rays emitted by muscle appear to be 
identical with the n-rays of Blondlot, but those emitted by 
nerves differ from these in that they are partially arrested 
by aluminium.—On the phosphoric esters of glycerin: 
P. Carre.—The retrogradation and coagulation of starch: 
L. Maquenne, A. Fernbach and J. Wolff.—The use of 
sodium sulphide as an indicator in the estimation of glucose 
by Fehling’s solution: L. Beulaygue. Very exact results 
can be obtained in sugar titrations by the use of. spots of 
sodium sulphide on filter paper as an_ indicator.—The 
ablation of the parathyroids in birds: MM. Doyon and A. 
Jouty.—The selection of small differences which present the 
characters with continuous variations: Georges Coutagne. 
—On the double secreting apparatus of Dipteryx : Edouard 
Heckel and H. Jacob de Cordemoy.—On_ polymorphic 
transformations: M. Wallerant.—On the geology of the 
Alps: Emile Haug.—Contribution to the knowledge of the 
Lutecian formations of Senegal: Stanislas Meunier. The 
material collected by M. Friry confirms the view that there 
was a large Eocene sea in Africa, and also tends to show 
that there was direct marine communication between 
Senegal and Egypt.—On a substitute for ligatures in 
surgery: M. 
Wassilieff. 
DIARY OF SOCIETIES. 
THURSDAY, JANUARY 14. 
InsTITUTION OF ELECTRICAL ENGINEERS, at 8 —The City and South 
London Railway; Working Results of the Three Wire System applied 
to ‘Traction, &c.: P. V. McMahon. (Adjourned discussion.)—On the 
Magnetic Dispersion in Induction Motors, and its Influence on the 
Design of these Machines: Dr. Hans Behn-Eschenburg. 
Roya INsTITUTION, at 5.—The Flora cf the Ocean: G. R. M. 
F-R.S. 
MATHEMATICAL Socikry, at 5.30.—On Various Systems of Piling: Prof. 
J. D. tverett.—The Solution of Partial Differential Equations by Means 
of Definite Integrals : 
OV eV PAVE 
eae Z oo 
da? Oxy ax,2 
H. Bateman.—On the Notion of Lines of Curvature in the Theory of 
Surfaces: Dr. G. Prasad.—On Groups of Order A%gB8: Prof. W. 
surnside.—Kleciric Radiation from Conductors : H. M. Macdonald.—Open 
Sets of Points and the Theory of Content: Dr. W. H. Young. 
SocisTy oF ArTs, at 4.30.—The Presidency of Bombay : Sir William Lee- 
Warner, K.C.>.1. 
Murray 
pects oO: 
FRIDAY, January 15. 
Royat Institution, at 9.—Shadows: Lord Rayleigh. 
INsTITUTION OF MECHANICAL ENGINEERS, at 8.—Sixth Report to the 
Alloys Research Committee on the Tempering of Steel: the late Sir 
William C. Roberts-Austen, K.C.B., F.R.S., and Prof. William Gowland. 
INSTITUTION OF Civin ENGINEERS, at 8.—Pumping and Disposal of 
Sewage at York: A. D. Creer. 
Pusiic ScHoot Science Masters’ AssociaTion, at 1.45.—The Possi- 
bility of Fusing the Mathematical and Science Teaching of Public Schools : 
R. E. Thwaites.—Science in the Certificate Examination: W. A. 
Shenstone, F.R.S., and M. D. Hill.—Nature Study: O. H. Latter. 
SATURDAY, January 16. 
Royat InstiTuTI0N, at 3.—British Folk Song: J. A. F. Maitland. 
TUESDAY, January 19. 
Rovat Institution, at 5.—The Development of Animals: Prof. L. C. 
Miall, F.R.S. 
Roya. SraTIsTICAt SociETYy, at 5. 
ZooOLoGicaL Sociery, at 8.30.—A Monograph of the Coleoptera of the 
Genus Hipporhinus: Guy A. K. Marshall.—On Proposed Additions to 
the Accepted Systematic Characters of C-rtain Mammals: Dr. Walter 
Kidd.—Some Observations on the Skull of the Giraffe: Dr. W. G. 
Ridewood. 
Society oF Arts, at 8.—Celtic Ornament: George Coffey. 
INsTiTUTION OF CiviL ENGINEERS, at 8.—Discussion of Paper on the 
Electrical Re-construction of the South Londa Tramways on 
Conduit System: A. Millar.—To be followed by: The Sanding-up of 
Tidat Harbours: A. E. Carey. 
WEDNESDAY, January 20 
RoyaL METEoROLOG! Society, at 7.30.—Presidential Address, The 
Present State of Ocean Meteorology: Captain D. Wilson-Barker. 
Royat Mickoscoricat society, at 8.—Presidential Address, On the 
Evolution of Vertebrate Animals in Time : Dr. H. Woodward. 
GEOLOGICAL Society, at 8 —On the Jaws of Ptychodus trom the Chalk: 
Dr. A. Smith Woodward, F.R.s.—On the Igneous Rocks of Spring Cove, 
near Weston-super-Mare: W. S. Boulton. 
CHEMICAL Socié vy, at 5.30 —Optically Active Asymmetric Nitrogen Com- 
pounds @- and /-phenylmethylethy)benzylammonium Salts: H. O. Joncs.— 
‘The Chemical keacuions of Nickel Carbonyl, Part i., Reactions with the 
Halogens, &c.: J. Dewar and H. O. Jones.—The Chemica! Reactions of 
Nickel Carbonyl, Part (1., Reaction with Aromatic Hydrocarbons in 
Presence of Aluminium Chloride. Synthesis of Aldehydes and Anthra- 
cene Derivatives: J. Dewar and H. O. Jone 
of Determining Molecular Weights : 
NO. 1785, VOL. 69] 
AL 
—A Microscopical Method | 
G. Barger —o-Nitrobenzoylacetic | 
Acid: E. R, Needham and W. H. Perkin, jun.—The czs- and trrns- 
Modifications of aay-Trimethylglutaconic Acid: W. H. Perkin, jun , and 
Miss A. E. Smith.—The Influence of Nuclear Substitution on the Rate of 
Oxidation of the Side-chain, I., Oxidation of the Mono- and Di- 
chlorotoluenes: J. B. Cohen and J. Miller. (1) A Simple Thermo tat for 
Use in Connection with the Refractometric Examination of Oils and Fats. 
(2) The Interdependence of the Physical and Chemical Criteria in the 
Analysis of Butter-fat: T. E. Thorpe —The Condensation of Furfur- 
aldehyde with Sodium Succinate: A. W. Titherley and J. F. Spencer. 
ENTOMOLOGICAL SoclETy, at 8.—Annual Meeting.—The President, Prof. 
E. B. Poulton, F.R.S., will deliver an Address. 
Society oF Arts, at 8.—Organ Design: Thomas Casson. 
THURSDAY, January 21. 
Roya InstiTuTIoNn, at 5.—The flora of the Ocean: G. R. M. Murray, 
F.R.S. 
Linnean Society, at 8.—An Account of a Plankton Expedition to the 
Bay of Biscay in H.M.S. Research in 1900: Dr. H. G. Fowler.—The 
Crustacea obtained by Dr. G. H. Fowler in the Biscayan Plankton: Rey. 
T. R. R. Stebbing, F.R.S. 
FRIDAY, JANUARY 22. 
Royat INnstTiruTiIon, at 9.—Spectroscopic Studies of Astrophysical 
Problems at Stonyhurst College Observatory : Rev. Walter Sidgreaves, 
S-J: 
Puysicat Society, at 5.—The Photographic Action of Radium Rays: 
S. Skinner.—Astigmatic Aberration: W. Bennett.—Some New Cases of 
Interference and Diffraction: Prof. R. W. Wood.—Exhibition of Instru- 
ments by Messrs. Crompton and Co. 
SATURDAY, January 23. 
Royat InsTiTuTION, at 3.—British Folk Song: J. A. F. Maitland. 
MaTHEMATICAL ASSOCIATION, at 2.—Annual Meeting.—Models of 
Regular and Semi-regular Solids, including the four “‘ polyédres étoilés ” 
of Poinsot, exhibited by Mr. E. M. Langley.—An Account of a Recent 
Discussion on the Possibility of Fusion of the Teaching of Mathematics 
and Science: C. S. Jackson.—A Geometrical Note: J. C. Palmer.— 
Advanced School Courses of Mathematics: C. A. Rumsey. 
CONTENTS. 
Experimental Studies in Development. 
' PAGE 
By J.B. F. 241 
The Alkali and Chlorine Industry. By C. Simmonds 242 
The Elements of Electrical Engineering. By 
Maurice Solomon) | 2205) > leslie iil earner 
The Physiology of Mental Activity. ByC.S.M.. 244 
Our Book Sheif :— 
Laisant: ‘‘L’Education fondée sur la Science.’’— 
AL S55.< +s) 2) Ae: Sto ee 245 
“*The Museums’ Journal.”—R. L. 245 
Miller : ‘* Laboratory Physics” 246 
‘* Opere di Galileo Ferraris”. . . 246 
Bowden : ‘* Elements of the Theory of Integers a 246 
Lespagnol : ‘‘ Géographie Générale”... ... . 246 
Marden: ‘‘ Pushing to the Front, or Success under 
Dificulties??.......° 3° Saeeeh a seen ae eee 246 
Letters to the Editor :— 
Radio-active Gas in Mineral Springs.—Lord Blyths- 
wood and H. S. Allen . 2) eee) to kee eA 
Projection of Imitation Spinthariscope Appearance. — 
Sir Oliver Lodge, F.R.S. . . . en 247 
American Tropical Laboratory.—N. L. Britton . . 247 
Escape of Gases from Atmospheres.—Dr. G. John-- 
stone )Stoney, FORTS 2s) - eeenca) 
On the Origin of Spiral Nebulas.—Prof. J. M. 
Schaeberle) ji. <. toe eee eee 
Dynamical and Granular Media.—Prof. G. H. 
Bryan, FORISS) 0 ecu caeac ence - an eemeenO 
Phosphorescence of Photographic Plates.—T. A. 
Vaughton Pose robes Medes: 8. est 
Formation of Coal.  (///zstrated.)—Henry Hall 250 
The Lamprey.—J. Pentland-Smith ...... . 250 
Earth Structure. (J///ustrated) By Prof. J. Milne, 
F.R.S. PEGE cacobe cane 5 oc 5 AGU 
The Santa Cruz Fauna and the Princeton Expedi- 
tion to Patagonia. ByR.L. ... et i 253 
Prof. Kari Alfred von Zittel. By A.S.W..... 253 
Notes Sis gens s) Ghhe es os, vo. cee eee eZee 
Our Astronomical Column :— 
Distributiontofithe Stars). |...) eens 259 
Report ot the Windsor, N.S.W., Observatory 259 
A French-Chinese Calendar arate: 259 
AV BNSHeIBONGEN Gp) cee) sce le a nn 
The Physical Laboratory at Leyden. (J//ustrated.) 
By H. H. F. Hyndman Od air oo lolp 4.8) 3s AED) 
Austrian Geological Survey. . . ees ae cee ee ZOl 
Atmospheric Absorption and Emission of the 
Extreme Ultra-Violet Radiations ibis gaky Ute eZ 
University and Educational Intelligence. . . . . 262 
Societiesjand!Academies) {9772 2). <5). seencos 
DiaryofiSocieties’ =.) cy < cos iecin ie) einem? Ot 
amet T Et 
