NATURE 
[APRIL 1, 1897 
DIARY OF SOCIETIES. 
THURSDAY, Apriv 1. 
Roya. Society, at 4.30.—The Croonian Lecture—‘‘ The Mammalian Spinal + 
Cord as an Organ of Reflex Action”—will be delivered by Prof. C. S. 
Sherrington, F.R.S. 
Roya InstiTuTION, at 3.—The Relation of Geology to History : Prof. W. 
Boyd Dawkins, F.R.S. 
Sociery OF ARTS, at 4.30.—A Visit to Russian Central Asia: Michael 
Francis O'Dwyer. 
LINNEAN Society, at 8.—On the Evolution of Oxygen from Coloured 
Bacteria: Dr. A. J. Ewart.—On the Germination of Spores of Agaricinee : 
Miss Helen Beatrix Potter. 
Cuemicat Society, at 8.—On the Oxidation of ay-Dimethyl-a’-Chloro- 
pyridine : E. Aston and Prof. J. Norman Collie, F.R.S.—The Composition 
of Cooked Fish: K. J. Williams. 
Camera Cuus, at 8.15.—Mountain and West Coast Scenery at Home and 
Abroad: T. C. Porter. 
FRIDAY, Apri 2. 
Roya. INsTITUTION, at_9.—Metallic Alloys and the Theory of Solution: 
Charles T. Heycock, F.R.S. 
GEOLOGISTS’ AssocIATION, at 8.—The Physical History of Romney Marsh ; 
George Dowker.—A Collection of Flint Implements from Cookham : 
Llewellyn Treacher. 
SATURDAY, Apri 3. 
Roya INsTITUTION, at 3.—Electricity and Electrical Vibrations: Lord 
Rayleigh, F.R.S. 
Geovocists’ AssociATIon (Baker Street Station), at 1.37.—Excursion to 
Chesham and Cowcroft. Director : Upfield Green. 
MONDAY, ApRit 5. 
Seay OF ARTS, at 4.30.—Alloys: Prof. W. C. Roberts-Austen, C.B., 
SANITARY INSTITUTE, at 8.—Sanitary Building Construction: Prof. T. 
Roger Smith. 
Society or CuHEmicat INpbustTRY, at 8.—Election of Officers and Five 
Members of Committee for the Session 1897-98.—The Chemical Stability 
of Nitro-compound Explosives : Oscar Guttmann. 
Vicroria INnsTiTUTE, at 4.30.—Australian Aboriginal Art: The Bishop of 
Ballarat. 
TUESDAY, Aprit 6. 
Roe INsTITUTION, at 3.—Animal Electricity: Prof. A. D. Waller, 
-R.S. 
Sociery oF Arts, at8.—Recent Travels in Rhodesia and British Bechuana- 
land: C. E. Fripp. 
ZOOLOGICAL Society, at 8.30.—On the Myology of the Terrestrial Carni- 
vora: Drs. B. C. A. Windle and F. G,. Parsons.—Note upon the Minute 
Structure of the Teeth of Votoryctes: C. S. Tomes, F.R.S.—On the 
Blue Bear of Tibet, with Notes on the Members of the Uvsus arctus 
Group: R. Lydekker, F.R.S.—An Account of the Freshwater Fishes 
collected in Celebes by Drs. P. and F, Sarasin : G. A. Boulenger, F.R.S. 
INSTITUTION OF CiviL ENGINEERS, at 8.—Paper to be further discussed : 
Electric Lifts and Cranes: Henry W. Ravenshaw.—Paper to be read, 
time pérmitting : The Blackwall Tunnel : David Hay and Maurice Fitz- 
maurice. —Ballot for Members. 
MINERALOGICAL Society, at 8.—On a New Occurrence of Apophyllite in 
South Africa: J. Henderson.—On a Mineral from Hungary: Messrs. 
Prior and Spencer.—On the Indexing of Mineralogical Literature: Prof. 
Miers.—Some Simple Names for the Thirty-two Types of Crystal Sym- 
metry : Prof. Miers. 
Royat VicroriaA HALL, at 8.30.—Movements of Plants: Rey. George 
Henslow. 
WEDNESDAY, Aprit 7. 
Society oF Arts, at 8.—Dairy Produce and Milk Supply : M. J. Dunstan. 
GEOLOGICAL Society, at 8. —On the Morte Slates and Associated Beds in 
North Devon and West Somerset, Part II.: Dr. Henry Hicks, F.R.S.— 
The Glacio-Marine Drift of the Vale of Clwyd: T. Mellard Reade. 
ENTOMOLOGICAL SociEeTy, at 8.—Report of the Committee on the Protec- 
tion of British Insects in danger of Extermination. 
SANE AEE INSTITUTE, at 8.—Notification of Measles: Dr. Henry R. Ken- 
woo 
Socrery oF Purpric ANALysTs, at 8.—The Separation and Identification 
of the Typhoid and Colon Bacilli: F. Wallis Stoddart.—Notes on 
Alcohol: J. F. Liverseege. 
InstTiruTION. OF NAVAL ARCHITECTS, at r2.—Annual Report of Council, 
Election of Presdent, Officers, and Council.—Address by the Chairman, 
the Right Hon. the Earl of Hopetoun, G.C.M.G.—The following Papers 
will then be read and discussed :—Recent Trials of the Cruisers Power/ud 
and Yerrrble: A. J. Durston, C.B., R.N.—Water Tube Boilers in War- 
ships: Rear-Admiral C. C. P. Fitzgerald, R.N.—A Mechanical Method 
of ascertaining the Stability of Ships : A. G. Ramage. 
THURSUAY, Aprrit 8. 
RoyAt Society, at 4.30.—/robad/e Papers: The Production of X-rays of 
different Penetrative Values : A. A, C. Swinton,—On the Application of 
Harmonic Analysis to the Dynamical Theory of the Tides, Part 1. : S. S. 
Hough.— Photographic Spectra of Stars to the 3} Magnitude: F. 
McClean, F.K.S.—(t) Double (Antidrome) Conduction in the Central 
Nervous System ; (2) Further Note on the Sensory Nerves of Muscles : 
Prof. Sherrington, F.R.S.—On the Breaking-up of Fat in the Alimentary 
Canal under Normal Circumstances and in the Absence of the Pancreas : 
Prof. V. Harley.—Condensation of Water Vapour in the Presence of 
Dust-free Air and other Gases: C. T. R. Wilson.—On Boomerangs: G. 
T. Walker. 
AE InsTiTUTION, at 3-—Roman Britain: Prof. W. Boyd Dawkins, 
E-R.S. - 
MATHEMATICAL Society, at 8.—On the Potentials of Rings: 
Dixon.—An Extension of a certain Theorem: Rey. F. H. Jackson. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—Recent Developments in 
Electric Traction Appliances : H. A. Baylor. 
InsTiruTion OF NAVAL ARCHITECTS, at 12.—On the Fighting Value of 
certain of the Older Ironclads if re-armed : Captain the Right Hon. Lord 
Charles Beresford, C.B., R.N.—The Application of the Compound Steam 
Turbine to the Purpose of Marine Propulsion : Hon. Charles Parsons.—On 
the Use of the Mean Water-Line in designing the Lines of Ships: A. G. 
NO. 1431, VOL. 55] 
A. L. 
Ramage. At 7.—The Accelerity Diagram of the Steam-Engine: J. 
Macfarlane Gray.—Note on the Geometry of Stability: J. Macfarlane 
Gray.—Acetylene, and its Probable Future Afloat: Prof. Vivian B. 
Lewes. 
Camera C.us, at 8.15.—The Phonograph: Mr. Stroh and F. C. B. Cole. 
FRIDAY, Aprit 9 
Roya INSTITUTION, at 9.—The Limits of Audition: Lord Rayleigh, 
F.R.S. 
PuysicaL SoOciETY, at 5.—A Nickel Stress Telephone: T. A. Garrett and 
W. Lucas.—On Alternating Currents in Concentric Conductors: W. A. 
Price.—On the Effect of Capacity on Stationary Electrical Waves in 
Wires : W. B. Morton. 
Roya. ASTRONOMICAL SOCIETY, at 8. 
INSTITUTION OF CivIL ENGINEERS, at 8.—Poole Harbour: Harold Ber- 
ridge. 
BOOKS, PAMPHLETS, and SERIALS RECEIVED. 
Booxs.—First Stage Inorganic Chemistry: Dr. G. H. Bailey (Clive).— 
Statesman’s Year Book, 1897 (Macmillan).—Algebra for Beginners ; Dr. I. 
Todhunter, revised and enlarged by Prof. S. L. Loney (Macmillan),— 
Hydraulic Machinery : R. G. Blaine (Spon).—Bourne's Insurance Directory, 
1897: W. Schooling (E. Wilson).—Report of Observations of Injurious 
Insects: E. A. Ormerod, 2oth Report (Simpkin).—Who’s Who, 1897 
(Black).—Les Femmes dans la Science: A. Rebiére, deux édition (Paris, 
Nony).—Among British Birds in their Nesting Haunts: O. A. J. Lee, Part 3 
(Edinburgh, Douglas),—First Principles of Natural Philosophy: Prof. A. E. 
Dolbear (Boston, Mass., Ginn).—Natural History in Shakespeare's Time : 
H. W. Seager (Stock).—Recherches sur la Seve Ascendante: H. S. 
Chamberlain (Neuchatel, Attinger).—Ueber den Bau der Korallenriffe : Dr. 
A. Kramer (Kiel, Lipsius).—Congrés International des Péches Maritimes, 
September 1896, Comptes rendus des Séances (Paris).—A Guide to the 
Clinical Examination of the Blood for Diagnostic Purposes: Dr. R. C. 
Cabot (Longmans). 
PaMPHLETs.—On the Colour and Colour-Patterns of Moths and Butter- 
flies: A. G. Mayer (Boston, Mass.)—Some Factors in the Evolution of 
Adaptations: J. D. Haviland (Porter).—Birds of the Galapagos Archi- 
pelago: R. Ridgway (Washington). E 
SeRIALs.—Longman’s Magazine, April (Longmans).—Good Words, April 
| (Isbister).—Sunday Magazine, April (Isbister).—Chambers’s Journal, April 
(Chambers).—Reliquary, &e., April (Bemrose) —Journal of the Chemical 
Society, February (Gurney),—Economic Journal, March (Macmillan).— 
Century Magazine, April (Macmillan).—Zeitschrift fiir Criminal-Anthro- 
pologie, Band 1, Heft x (Berlin, Priber).—Himmel und Erde, Marz (Berlin, 
Paetel). 
CONTENTS. PAGE 
A Dictionary of Birds. ByO.S....... 505 
The Principles of Sociology. By H. W.B. . 506 
Our Book Shelf :— 
Cornish: ‘Short Studies in Physical Science” . 507 
Dewe: ‘‘ New Thoughts on Current Subjects” . 507 
Van *t Hoff: ‘* Vorlesungen iiber Bildung und Spal- 
tung) von Doppelsalzem . . . >. see SO 
- Crapper: ‘‘ Practical Electrical Measurements” . . 507 
Bland : ‘‘ Notes of Lessons on Elementary Botany” . 507 
Dolman: ‘* Dr. Nansen: the Man and his Work” . 507 
Letters to the Editor :— 
Early Arrival of the Swift.—Prof. Alfred Newton, 
F.R.S....) Rae 2 nb 
Red Dust of Doubtful Origin.—J. M. Yates. . . . 508 
Experiment on Interference. (Weth Déagram.)— 
John Wylieiaaeee. -; - cl. Se ee 
The Additional Colouring Matter of Fucus vesici- 
Josus.—Clarence Waterer . . » ee a eS 
Chinese Yeast.—Prof. Italo Giglioli. . ..... 508 
The Electric Eel.—J. J. Quelch . . .°. . . 2552 508 
The Utility of Specific Characters.—Rev. John T. 
Gulick <7 ape sk a cg eS CS 
Coccospheres and Rhabdospheres.  (///ustrated.) 
By George Murray and V. H. Blackman... .. 510 
M. Antoine Thomson d’Abbadie RP fe ty Sik 
Mr. W. W. Rundell. By E. W.C. . at 512 
Notes... ogee ns. Senn 512 
Our Astronomical Column:— 
The. PlanctaViarsmemeeee ts -  : * e 516 
Double-Star Measures. .... . } eee 516 
Belgium Observatory Annual . «ss, Fell (ets eee 
The James Forrest Lecture—Bacteriology. By Dr. 
G. Sims Woodhead :): - -) o eaieir tenn, 
The Pasteur Memorial Lecture of the Chemical 
Society. By Prof. Percy Frankland, F.R.S... . 518 
The Diamond Mines of Kimberley. By Dr. William 
Crookes, FRU Siegen a: | --) cu eG) 
University and Educational Intelligence Sees 24: 
Scientific Serials Ad ig ee Eee ie carte o- WISrat! 
Societies and Academiesifee i... - steer ye) 
Diary of Societies . . cs ca heey ORME CMC See sete) 
Books, Pamphlets, and Serials Received ..... 528 
