288 
NATURE 
[JANUARY 21, 1897 
acidified solution of potassium iodine. The density found was 
; that of oxygen, within the limits of experimental error.—De- 
composition -of metallic sulphates by hydrochloric acid, by M. 
Albert Colson.—On the polymerisation of some cyanic com- 
pounds, by M. Paul-Lemoult. Correcting some thermochemical 
calculations given in a previous note.—Dimorphism of the 
optical isomerides of the succinates of camphol, by M. J. 
Minguin.—Action of potassium cyanide upon the 1 : 4 lactones, 
by M. Edmund Blaise.—Phosphoric ethers of allyl alcohol, by 
M. J. Cavalier.—On a difference between high and low yeasts, 
by M. P Petit. The two kinds of yeast show differences in 
their behaviour towards nitrogenous foods.—Contribution to the 
study of the coagulating ferment of the blood, by MM. A. 
Dastre and N. Floresco.—Refractory period in the nervous 
centres, by MM. André Broca and Charles Richet.—Evolution 
of the Monstrillide, by M. A. Malaquin.—On the relations 
existing between the Déscofoma comata (Berlese) and Laszzs 
mixtus (Nylander), by M Charles Janet.—On the development 
of the white rot in the vine (Charrinza d:splodiella), by M. P. 
Viala.—The Swiss Rhone tributary of the Rhine, by M. Maurice 
Lugeon.—On the differential equations of the second order, 
with several independent variables, by M. A. J. Stodolkiewitz. 
DIARY OF SOCIETIES. 
THURSDAY, January 21. 
RovyAL SOciETy, at 4.30.—On Cheirostrobus, a New Type of Fossil Cone 
from the Calciferous Sandstone: Dr. D. H_ Scott, F.R.S.—(1) Experi- 
ments in Examination of the Peripheral Distribution of the Fibres of 
the Posterior Roots of some Spinal Nerves, Part II. ; (2) Cataleptoid ; 
Reflexes in the Monkey; (3) On Reciprocal Innervation of Antagonistic 
Muscles(third note): Prof. Sherrington, F.R.S 
OES INSTITUTION, at 3.—Some Secrets of Crystals: Prof. H. A. Miers, 
-R.S. 
LINNEAN Society, at 8.—On the Origin of the Corpus callosum; a Com- 
parative Study of the Hippocampal Region of the Cerebrum of Mar- 
supialia and certain Cheiroptera : Dr. G. Elliott Smith.—On the Minute 
Structure of the Nervous System of the Mollusca: Dr. J. Gilchrist. 
»CHEMICAL Society, at 8.—Studies of the Properties of Highly Purified 
Substances. I. The Influence of Moisture on the Production of Ozone 
from Oxygen and on the Stability of Ozone. II. The Behaviour of 
Chlorine, Bromine, and Iodine with Mercury. III. The{ Behaviour of 
Chlorine under the Influence of the Silent Discharge of Electricity and in 
Sunlight: W. A. Shenstone.—Action of Diastase on Starch, Part III. : 
A. R. Ling and J. .. Baker.—The Solution Density and Cupric-reducing 
Power of Dextrose, Leyulose, and Moist Sugar: H: race T. Brown, F.R.S. ; 
Dr. G. Harris Morris; J. H. Millar.—Derivatives of Maclurin, Part II.: 
A. G. Perkin. 
GRESHAM COLLEGE, at 6.—Milk, Meat, and Oysters as Carriers of Disease : 
Dr. Symes Thompson. 
FRIDAY, January 22. 
Roya INsTiTUTION, at 9.—Properties of Liquid Oxygen: Prof. Dewar, 
F.R.S. 
PuysicaL Society, at 5.—An Exhibition of some Simple Apparatus by W. 
B. Croft.—On the Pas-age of Electricity through Gases: E. C. Baly. 
GRESHAM COLLEGE, at 6.—Diphtheria: Dr. Symes Thompson. 
SUNDAY, JANuary 24. 
Sunvay Lecrure Society, at 4.—Life on the Surface of Water: Prof. L. 
C. Miall, F.R.S. 
MONDAY, January 25. 
Society or Arts, at 8.—Material and Design in Pottery : W. Burton. 
RoyaL GEOGRAPHICAL SoOcIETY, at 8.30.—An Expedition across Spitz- 
bergen: Sir W. Martin Conway. 
INSTITUTE OF ACTUARIES, at 7-—Rates of Mortality in certain Parts of 
Africa: A. E. Sprague. 
“Camera Cuus, at 8 15.—-The Zamanass for Registering High Velocities : 
Sir C. Purcell Vaylor, Bart. 
PUESDAY, January 26. 
‘RovaL InsTiruTION, at 3.—Animal Electricity: Prof. A. D. Waller, 
E.R.S. 
INSTITUTION OF CiviL ENGINEERS, at 8.—The Diversion of the Periyar: 
Colonel J.'Pennycui k, R E. 
ANTHROPOLOGICAL INSTITUTE, at 8.—Anniversary Meeting. 
Roya PuotToGRaPHic SOCIETY, at 8.—Architectural Photography : Ernest 
Marriage. 
WEDNESDAY, January 27. 
British ASTRONOMICAL ASSOCIATION, at 5. 
THURSDA). January 28 
Rovat Society, at 4 30.—The following Papers will probably be read :— 
On the Capacity and Residual Charge cf Dielectriis as affected by 
Temperature and Time: Dr J. H pkinson, F R.S., and E. Wilson.— 
On the Electrical Resistivity of Electrolytic Bismuth at Low Tempera- 
tures and in Magnetic Fields: Prof. Dewar, F.R.S., and Prof. Fleming, 
F.R.S.—On the Selective Conductivity exhibited by certain Polarising 
Substances : Prof. J. C. Bose. 
Roya INsTITUTION, at 3.—Some Secrets of Crystals : 
E.R.S. 
Society oF Arts, at 8.—The Mechanical Production of Cold: Prof. James 
A. Ewing, F R.S. 
Ensrirurion oF ELECTRICAL ENGINEERS, at 8 —Electrical Interlocking, 
the Block, and Mechanical Signals on Railways. F. T. Hollins. 
NO. 1421, VOL. 55] 
Prof. H. A. Miers, 
FRIDAY, January 209. 
Rowan INSTITUTION, at 9.—The Polarisation of the Electric Ray: Prof. J. 
. Bose. 
InsTiITUTION OF CiviL ENGINEERS, at 8.—An Experimental Investigation 
of the Efficiency of a Pelton Waterwheel : S. Henry Barraclough. 
BOOKS, PAMPHLETS, and SERIALS RECEIVED: 
Books.—Onoranze al Prof. S. Cannizzaro. Rediconto Generale 
(Roma).—Smithsonian Physical Tables: T. Gray (Washington).—The 
Practical Photographer, Vol. 7 (Lund).—Our Weights and Measures: H. 
. Chaney (Eyre) —An Introduction to the Study of Chemistry : Drs. W. 
Perkin and B. Lean (Macmillan).—Colliery Surveying: T. A. 
O'Donahue (Macmillan) —Fruit Culture for Amateurs: S.*f. Wright 
(Gill).—The Hemiptera- Hemoptera of the British Islands: J. Edwards (L. 
Reeve).—Black-board Drawing; M. Swannelt (Macmillan).—Microscopic 
and Systematic Study of Madreporarian Types of Corals: Dr. M. M. 
Ogilvie (Dulau).—Among British Birds in their Nesting Haunts: O. A. J. 
Lee, Part 2 (Edinburgh, Douglas)—Den Norske Nordhavs-Expedition, 
18-6b78. xxii. Zoologi, Tunicata: A. Huitfeldt-Kaas (Christiania, Gron- 
dahl).—A Manual of Elementary Seamanship: D. Wilson-Barker (Griffin). 
—Getting Gold: J. C. F. Johnson (Griffin).—Pioneers of Evolution from 
Thales to Huxley: E. Clodd (Richards).—Travels in West Africa: Mary 
H. Kingsley (Macmillan).—A Year in the Fields: C. Johnson (Smith, 
Elder).—Diseases of Plants induced by Cryptogamic Parasites: Dr. K. F. 
von Tubeuf; English Edition by Dr. W. G. Smith (Longmans).—On 
Mechanical Selection and other Problems: Dr. K. Jordan. 
Pampu_Lets.—Exposition Nationale Suisse. Catologue illustré Chasse 
et Péche (Genéve).—The Climate of Bournemouth in relation to Disease, 
especially Phthisis : Dr. A. Kinsey-Morgan (Bristol, Wright).—To Winni- 
peg, Manitoba, and Back: S. Marriott (Simpkin).—Das Wesen der Elek- 
trizitat und des Magnetismus: J. G. Vogt (Leipzig).—Exercises in Practical 
Physiology. Part 1. Elementary Physiological Chemistry: A. D. Waller 
and W. L. Symes (Longmans). 
Ser1ats.—Lloyd’s Natural History. British Birds, Parts 8 and g: Dr- 
B. B. Sharpe (Lloyd).—Strand Magazine, January (Newnes).—Geological 
Magazine, January (Dulau).—Mind, January (Williams).—Proceedings of 
the Incorporated Society of Psychical Research, December (K. Paul).— 
Proceedings of the Physical Society, December (Taylor).—Journal of 
Anatomy and Physiology, January (Griffin).—Morphologische Jahrbuch, 
24 Band, 4 Heft (Leipzig, Engelmane).—Psychological Review, January 
(Macmillan).—The British Moss-Flora, November : Dr. R. Braithwaite (the 
Author, Clapham Road).—Lean’s Royal Navy List, January (Witherby).— 
The Bachelor of Arts, December (N.Y.).—L’Anthropologie, November— 
December (Paris, Masson).—Neudrucke von Schriften und Karten tiber 
Meteorologie und Erdmagnetismus, Nos. 7, 8, 9 (Asher),—American 
Journal of Mathematics, Vol. xix. No. 1 (Baltimore).—The Engineering 
Magazine, January (Tucker)—Quarterly Review, January (Murray).— 
Jourual of the Franklin Institute, January (Philadelphia). 
CONTENTS. PAGE 
Out-Door Studies of Nature. By W. H. D. A. 2415) 
hie unar Theorysaeeeemeentc ee! sls t . . 266 
Our Book Shelf :— 
Blount and Bloxam : ‘‘ Chemistry for Engineers and 
Manufacturers aun cc 218/ 
Maspero: ‘‘ The Struggle of the Nations”. . . . . 267 
Hepworth : ‘‘ The Camera and the Pen” | 3) 268 
Letters to the Editor:— 
Bog Slides and Debacles.—G. Henry Kinahan . . 268 
On the Goldbach-Euler Theorem concerning Primes. 
=—Prof. Jc Je SPVeSten ears: 6. ole <» «269 
Patterns produced by Charged Conductors on Sensitive 
Plates. (//lustrated.\—James Anson . . 269 
The Force of a Pound.—Dr. T. W. Wright .. . 270 
Acceleration.—Rev. Edward Geoghegan; O.J.L. 271 
The Rydberg-Schuster Law of Elementary Spectra.— 
Prof. A. S. Herschel, F.R.S. . oe Re as 
Sailing Flight. (Z//ustrated.)—S. E. Peal .  .. 271 
Osmotic Pressure. (///ustrated.) By Lord Kelvin, 
GIC3V-0:, FE RiSaaeeeee Pe cs 
Method for Measuring Vapour Pressures of ; 
Liquids. (///ustra/ed.) By Lord Kelvin, G.C.V.O., 
FE-RS.2) 4. Se. ||. ee 
Relative Temperatures in Geissler Tubes... .. 274 
The Tomb of Louis Pasteur, (///ustrated.) .. . 275 
Notes 0's 5). ce ee eo ss (oem 
Our Astronomical Column:— 
Comet Perrine 1896, December8... . . ... . + 279 
Double Star Measures . ee 280 
The(Ganalsiof Marsaemeewee es) ) /- = - > =. «seen 
The Classification of Madreporaria. (///ustrated.) 
By Dr. Maria M. Ogilvie 5, Ge og 2D 
The Position and Work of the Central Technical 
Colleges. - .. . SiMe be oe ule 284 
University and Educational Intelligence ..... 286 
Societies and Academmesmemesys) 15 + - ») . «| seaeeon 
Diaryiof, Societies | aeEPpESier) © su. +... « up eeeeeoo 
Books, Pamphlets, and Serials Received ..... 288 
