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photographic method it has been found that the effect of Kirby.--Note Supplementary to a Paper on the Electric Driving of
Winding.gears: F. Hird.-Electric Winding-engines at the Exhibition Foucault currents is to augment the frequency of the
of the North of France, Arras, Pas-de-Calais : Ed. Lozé. --The Education oscillations per second without influencing the number of
of Mining Engineers in the United States: Prof. Howard Eckfeldt.-A. oscillations in each discharge. Hysteresis destroys the Outline of Mining Education in New Zealand : Prof. James Park.-Goaf
blasts in Mines in the Giridih Coal-field, Bengal, India : Thom23 oscillations and diminishes, more or less, the frequency.
Adamson -A study of the radiographic power of an X-ray tube : | LINNEAN Society, at 8. S. Turchini. The radiographic effects, as measured by CHEMICAL Society, at 8.-(1) The Constituents of the Seeds of Hydra
carpus Wightiana and Hydnuarpus Anthelmintica. Isolation of a the action on a photographic plate, are found to follow the
Homologue of Chaulmoogric Acid.-(2) The Constituents of the Seeds of same laws as the radioscopic effects, and there is reason
Gynocardia Odorata : F. B Power and M. Barrowcliff.-The Relation to suppose that the radiotherapeutic effects will follow of Ammonium to the Alkali Metals. A Study of Ammonium Magnesium
and Ammonium Zinc Sulphates and Selenates : A. E. H. Tutton.-Cansimilar laws as regards the relation between efficiency and
phorylazoimide : M. O. Forster and H. E. Fierz.-Influence of Substitnthe length of the equivalent spark.-On the conductivity
tion on the Formation of Diazoamines and Aminoazo-compounds. Part III. of the gases from flames : Eugène Bloch. The ions con
Azo-derivatives of the Symmetrically Disubstituted Primary Meta tained in the gases given off from a flame, at the end of diamines : G. T. Morgan and W. 0. Wootton.-Diazo-derivatives of
Mono-acylated Aromatic Para-diamines : G. T. Morgan and Miss F. M. a time sufficiently long take a mobility of the order of
G. Micklethwait.--The Significance of Optical Properties as Connoting 0:01 mm., and hence should be classed as large ions.-On
Structure; Campborquinone-hydrazones-oximes; a Contribution to the the ionisation and coefficient of magnetisation of aqueous Chemistry of Nitrogen: H. E. Armstrong and W. Robertson. --Solubility solutions : Georges Meslin.—The properties of pyrrhotine as a Measure of the Change undergone by Isodynamic Hydrazones. (t)
Canphorquinonephenylhydrazone. (2) Acetaldehydephenylhydrazone : W. in the magnetic plane : Pierre Weiss.--On the causes of
Robertson.-The Design of Gas-regulators for Thermostats : T. M. varieties of halation in photographic plates : A. Guébhard. Lowry.-The Constitution of Barbaloin. Part I.: H. A. D. Jowett and ---The triboluminescence of metallic compounds : D. C. E. Potter.--Infuence of Substitution on the Formation of Diazoamines
and Aminoazo-compounds. Part IV. 5-Bromo-as(4-Dimethyl-2: 4. Gernez. The luminous effect observed when certain
amine-toluene: G. T. Morgan and A. Clayton. -The Action of crystals are broken is not, as has been supposed, essentially
Hypobromous Acid on Piperazine : F. D. Chattaway and W. H. Lewis.a property of organic compounds, and a list of seventy-four i The Action of Magnesium Methyl Iodide on Pinene Nitroso-chloride :
W. A. Tilden and J. A. Stokes. - Racemisation Phenomena during the inorganic compounds is given in which this effect has been
Hydrolysis of Optically Active Menthyl and Bromyl Esters by Alkali: observed.--The properties of some anhydrous chlorides of
A. McKenzie, and H. B. Thompsor.. metals of the rare earths : Camille Matignon. Details
FRIDAY, JUNE 2. are given of the crystalline form, colour, density, melting i INSTITUTION OF MINING ENGINEERS (in ibe Rcoms of the Geological points, heats of solution and formation of the chlorides Society), at 10.30 A.M.-The Conveyor-system for filling at the Coal-lace,
as practised in Great Britain and Ainerica : W. C. Blackett and R. G of lanthanum, praseodymium, neodymium, and samarium.
Ware.-Underground Fires at the Greta Colliery, New Soosh -On a reaction of rhodium : Piñerûa Alvarez Chlorine,
Wales: J. Jeffries.-The Glology of Chunies Poort, Transvaal: A. R. acting on an alkaline solution of a rhodium salt, gives a
Sawyer. -Underground Horses at an Indian Colliery : T. Adamso . characteristic blue colour, due to the formation of sodium Description of the Eimbeck Duplex Base-line Bar: W. Eimbeck. perrhodate.-The action of the metal ammoniums on
SATURDAY, JUNE 3. alcohols : a general method for the preparation of the ROYAL INSTITUTION, at 3.- Exploration in the Philippines: A. H alcoholates : E. Chablay. The alkali ammoniums, acting
alkali ammoniums acting Savage Landor. upon a solution of the anhydrous alcohol in ammonia, give a quantitative yield of the alcoholate.--Propionylcarbinol
PAIGE and its derivatives : André Kling.-Contribution to the study of the derivatives of benzodihydrofurfurane : A. i The Anopheles Mosquitoes of India. By Dr. J. W. W. Guyot and J. Catel.--On methæmoglobin : M. Piettre Stephens .. ... and A. Vila.-Researches on the mode of action of philo- Exercises in Physics . . catalase : F. Batelli and Mlle. L. Stern. The name Mathematical Metapbysics ... philocatalase is given to a ferment which is present in British Minerals. By L. J. S....... many animal tissues, although without direct action on Our Book Shelf :catalase it possesses the property of protecting the cata Dickerson : “Moths and Butterflies"..... lase against the destructive action of anticatalase. The Stewart : “ Second Stage Magnetism and Electricity ** present paper deals with the mechanism of this reaction. Tarazona : “ Memoria sobre el Eclipse Total de Sol del -Researches on the comparative power of adhesion of
dia 30 de Agosto de 1905" ...::::::.. different copper solutions employed as a remedy against Otto: "Naturalistische und religiöse Weltansicht". :. 17 mildew : E. Chuard and F. Porchet.—On a bacterial Emch : “ An Introduction to Projective Geometry and decay of cabbage : Georges Delacroix.-The classification
its Applications ” .............. 77 and nomenclature of arable earths according to their Letters to the Editor:mechanical constitution : H. Lagatu.-The termination of Fictitious Problems in Mathematics.-A. B. Basset, the motor nerves in the striated muscles of man: R.
F.R.S. ; Dr. E. J. Routh, F.R.S. ....... 78 Odier.--On the problem of statical work : Ernest Solvay. On the Spontaneous Action of Radio-active Bodies -On the overlapping strata in the Piedmont zone : Maurice
on Gelatin Media. (Illustrated.)- John Butler Lugeon and Émile Argand.--On an extraordinary halo :
B urke . . . . . . . . . . . . . . . . . . M. Pernter.
The Consolidation of the Earth.- Rev. A. Irving . .
The Spirit-level as a Seismoscope. -G. T. Bennett.
A Feaiher-like Form of Frost. (Illustrated.)-H. M.
. . . . . . . . . . . THURSDAY, MAY 25
The Evolution of Engraving in the Stone Age. (Illus. Roval Society, at 4.30.-Croonian Lecture, “The Globulins": W. B. Hardy, F.R.S.
traled.) By A. C. H. ROYAL INSTITUTION, at 5.-Electro-magnetic Waves : Prof. J. A. Flem The New Diplodocus Skeleton. (Illustrated.). ... ing, F.R.S.
The Masai of East Africa. (Illustrated.) By Sir H. H. INSTITUTION OF ELECTRICAL ENGINEFRS, at 8.-Wireless Telegraphy
Johnston, G.C.M.G., K.C.B.....
Our Astronomical Column :-
Newly Discovered Nebulae .....
The Bruce Telescope Relerence Photographs.
Twelve Stars with Variable Radial Velocities..
Double “Canals" on Mars in 1903 ....... SATURDAY, May 27. Royal INSTITUTION at 3 – The Ev. lution of the Kingship in Early
Catalogue of New Double Stars.. Society: Dr. J. G. Frazer.
| The Royal Society Conversazione .. THIRSDAY, JUNE 1.
Atmospheric Electricity Observed from Balloons. ROYAL INSTITUTION, at 5.- Electro-magnetic Waves : Prof J. A. Fleming,
By George C. Simpson ........... .. F.R.S
University and Educat on al Intelligence. .. . INSTITUTION OF MINT FNGINEERS (in the Rooms of the Geological
Societies and Academies ............. Society), at It A.V. --The Firing of Babcock Boilers with Coke-oven Gases: T. Y. Greener. -Compuund Winding-engine at Lumpsey Mine : M. R. I
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