360 
IATL, 
[ FEBRUARY 7, 1907 
stituent of mineral waters.—A new method of estimating 
the halogens in organic compounds by means of the metal- 
ammoniums: E. Chablay. In previous papers the author 
has given an account of the action of the metal-ammoniums 
on various organic haloid compounds, and in this worl: 
it was noticed that the whole of the halogen remained 
after the reaction combined with the alkali metal. This 
fact has been utilised as the basis of a very neat method 
for determining halogens in organic substances. Full 
details are given, and numerous analyses establishing the 
accuracy of the method proposed.—The condensed 
chromium sulphates: Albert Coltson.—Some derivatives of 
hordenine: E. Léger. A description of the preparation 
and properties of the neutral tartrate, compounds with 
methyl and ethyl chloride, ethyl bromide and iodide, benzoyl 
and cinnamyl hordenine, and other derivatives.—Acetyl 
nitrate: Amé Pictet and Eugéne Khotinsky. This sub- 
stance has been obtained by dissolving nitric anhydride in 
anhydride, and separating by fractional distillation 
under reduced pressure. The nitrate detonates violently 
when suddenly heated, and hence had to be analysed by 
indirect methods. Towards aromatic substances, acetyl 
nitrate acts as a nitrating agent of great power, benzene, 
toluene, anthracene, and thiophene being nitrated at 
temperatures below o° C.—Ethyl benzoylglyoxylate: A. 
Wahl. Ethyl benzoylacetate in ether solution is sub- 
mitted to the action of well-dried nitrous fumes, and the 
product distilled under reduced pressure. The reactions 
of the new a-diketone with piperidine, hydroxylamine, 
o-phenylamine-diamine, semicarbazide, aniline, and phenyl- 
hydrazine were studied.—The volume variations of the 
nucleus, of the chromatic mass, and of the cell in the 
course of the development of the pollen of Nymphaea alba 
acetic 
and Nuphar luteum: W. Lubimenke and A. Maige.— 
Two new antelopes from Central Africa, Cephalophus 
centralis and Cephalophus aequatorialis : Maurice 
de Rothschild and Henri Neuville.—The affinities of the 
Bradypodidz (sloths) and, in particular, of Hemibradypus 
mareyi with the Hapalopside of the Santacruzian of 
South America: R. Anthony.—The toxic products of the 
organism (muscular extracts): MM. Charrin and Goupil. 
The properties of an aqueous extract of muscle vary with 
the pressure under which the juices are expressed. —The 
interpretation of certain facts of coloured vision: Adrien 
Guébhard. A criticism of a paper on the same subject 
by E. P. Fortin. 
DIARY OF SOCIETIES. 
THURSDAY, FEBRUARY 7. 
Rovat Society, at 4.30.—The Influence of Increased Barometric Pressure 
on Man, No. 3. The Possibility of Oxygen Bubbles being set free in the 
Body: Leonard Hill, F.R S., and M. Greenwood, jun.—On the Com- 
bining Properties of the Opsonin of an Immune Serum: Prof. R. Muir 
and W. B. M. Martin.—Experiments made to determine the Condition 
under which ‘‘Specific” Bacteria derived from Sewage may be present 
in the Air of Ventilating Pipes, Drains, Inspection Chambers, and 
Sewers: Major W. H. Horrocks.—Observations on the Life-History of 
Leucocytes, Part ii., On the Origin ot the Granules: C. E. Walker. 
Rovat INSTITUTION, at 3.—Standards of Weights and Measures: Major 
P. A. Macmahon, F.R.S. 
LINNEAN SOCIETY, at 8.—Pafers: New Plants from Malaya: Dr. Otto 
Stapf.—Tertiary Foraminifera of Victoria: the Balcombian Deposits ot 
Port Phillip: F. Chapman.—Z xhibitions: Specimens of Chara ornitho- 
poda: H. and J. Groves.—Some Observations of Climbing Plants (with 
lantern-slides): Rev. John Gerard.—Herbarium formed by A. Ruperti, 
1698-1700: W. Rose Smith. 
CHEMICAL SOCIETY, at 8.30.—On the Rapid Electroanalytical Deposition 
and Separation of Metals, Part i., The Metals of the Silver and Copper 
Groups and Zinc: H. J. S.‘Sand.—The Alkaloids of Ergot : G. Barger and 
F. H. Carr.—Influence of Substitution on the Formation of Diazo-amines 
and Amino-azo-compounds, Part vi., the Partially Methylated 4: 6- 
Diamino-7z-xylenes: G. T. Morgan and F. M. G. Micklethwait.— 
(1) The Reduction of Hydroxylaminodihydroumbellulone Oxime; (2) 
The Constitution of Umbellulone, Part ii., the Reduction of Umbellu- 
lonic Acid: F. Tutin.—Studies on Optically Active-Carbimides, Part v., 
The Aryl Esters and the Amides of 1-Menthylcarbamic Acid: R. H. 
Pickard and W. Oswald.—Some Constituents of Natural Indigo, Part i. 
A. G. Perkin and W. P. Bloxam.—The Occurrence of Isatin in some 
Samples of Java Indigo: A. G. Perkin.—(r) On the Ab-orption Spectra 
of Benzoic Acid, the Benzoates and Benzamide; (2) The Absorption 
Spectra of Phthalic, 7soPhthalic’ and Terephthalic Acids: Phthalic 
Anhydride and Phihalimide: W. N. Hartley and E. P. Hedley,—aay- 
Trimethyl- and aayy-Tetramethyl-tric»rballylic Acids and aA-Dimethyl- 
butane aBA-Tricarboxylic Acid: H. Henstock and C. H. G. Sprankling. 
—A Reaction of Certain Colouring Matters of the Oxazine Series: J. F. 
Thorpe. 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8. —Investigations on Light 
Standards and the Present Condition of the High Voltage Glow Lamp: 
NO. 1945, VOL. 75] 
IDiaryiOMSOCleties; (. ju <) cn iii sn ch leanne can 
C. C. Paterson (Conclusion of Discussion).—Comparative Life Tests on 
Carbon, Nernst, and Tantalum Incandescent Lamps using Alternating 
Currents: H. F. Haworth, T. H. Matthewman, and D. H. Ogley. 
FRIDAY, FEprRvuary 8. 
Rovat ASTRONOMICAL SOCIETY, at 5.—Anniversary Meeting. 
PuysicaL Society, at 8.—Annual General Meeting.—President’s Address. 
—The Magnetic Fields and Inductive Coefficients of Circular, Cylindrical, 
and Helical Currents: A. Russell. 
InsT1TUTION OF CiviL ENGINEERS, at 8.—The Reconstruction of a 
Swing-Bridge on the Southwold Railway: Claude Pain. 
MALACOLOGICAL SociETy, at 8.—Annual Meeting.—What Evolutionary 
Processes do the Mollusca show? B. B. Woodw aul 
MONDAY, FEBRUARY 11. 
Society or Arts, at 8.—Gold Mining and Goid Production: Prof. J. W. 
Gregory, F_R.S. 
Roya. GEOGRAPHICAL SOCIETY, at 8.30.—Round the North Magnetic 
Pole and through the North-west Passage : Captain Roald Amundsen. 
TUESDAY, FEBRUARY 12. 
Roya InsTiTuTION, at 3.—The Visual Apparatus of Man and Animals: 
Prof. William Stirling 
ANTHROPOLOGICAL INSTITUTE, at 8.15.—Note on a Dolmen at Presle, 
France: A. L. Lewis.—The Ethnology of Modern Egypt: Dr. C. S. 
Myers. 
2 WEDNESDAY, FEBRUARY 13. 
Sociery or ARTs, at 8.—Motor Omnibuses: Lord Montague of Beaulieu. 
THURSDAY, FesrRuary 14. 
Rovat Society, at 4.30. =Prohable Papers: Oa the Purification and 
Testing of Selenion: R. Vhrelfall, F.R.S.—On the Specific Inductive 
Capacity of a Sample of Highly Purified Selenium: O. U. Vonwiller and 
W. H. Mason.—The Thermomagnetic Analy-is of Meteoric and Artificial 
Nickel-Iron Alloys: S. J. W. Smith.—lLnvestigation of the Law of 
Burning of Modified Cordite : Major J. H. Mansell, R.A. 
Society oF ARTS, at 4.30.—The Practical Side of Famine i in India: Sir 
Frederick S. P. Lely, K.C.I.E. 
Lonpon INstTITUTION, at 6.--Scientific Method; Prof. H. E. Armstrong, 
F_RS. 
Roya INSTITUTION, at 3.—The Minute Structures of Igneous Rocks and 
their Significance: Alfred Harker, F.R.S. 
MATHEMATICAL SOCIETY, at 5.30. *Groups defined by the Order of the 
Generators and the Order of their Commutator: Prof. G. A Miller. - 
On the Reduction of the Factorisation of Binary Septans and Octans to 
the Solution of a Pellian: Dr. T. Stuart.—On Repeated Integrals: Dr. 
E. W. Hobson.—The Censtruction of the line drawn through a Given 
Peint to meet Two Given Lines: Prof. W. Burnside. 
FRIDAY, FEBRUARY <5. 
Roya [NSTITUTION, at 9.—Foraminifera: J. |. Lister, F.R.S. 
INSTITUTION OF MECHANICAL ENGINEERS, at 8.—Annual 
Meeting. 
General 
SATURDAY, FEBRUARY 16. 
Royat INnstTiTuTION, at 3.—Rontgen, Kathode, and Positive Rays: Prof. 
J. J. Thomson, F.R.S. 
CONTENTS. 
Anatomy ofthe Horse . . oe. 337 
Higher Education in Germany. ’ By Gis: 2m 338 
Geodesy inthe Schools . . 339 
An American Text-book of Entomology. “By R. S. 340 
Our Book Shelf :— 
Goesel: ‘‘ Minerals and Metals: a Reference-book 
of Useful Data and Tables of Information” . . . 341 
Donington : ‘‘ Practical Exercises in Chemistry” . . 341 
Hampson : ‘‘ Paradoxes of Nature and Science” . .. 341 
Harris: ‘‘Seasonal Botany, a Supplementary Text- 
book” wiuleqmstite wisi wa, le SSpl sien °2 ue) acs /akelcc nena ED 
Saundby: ‘‘The Treatment of Diseases of the 
MigestivesSystemimie wi mrene ener nue eee 341 
Letters to the Editor:— ‘ 
Radium and Geology.—Prof. J. Joly, F.R.S. 341 
The Green Tints of Sunset.—Joseph Offord 342 
February and March Meteors. —W. F. Denning . 342 
The Dawn of Modern pcoetaphy- lee hee 343 
Sir)/Michaell Poster, KC B:, F:RIS)2 © eens 
Notes. (J/lustrated.) .. - ME Se oY 
Our Astronomical Column :— 
Astronomical Occurrences in February. 350 
Micrometer Measures durin the Solar Eclipse of 
August, 1905. Merec ces oc Slo 
Heights of Meteors observed in 1906 o: slnsh econ MESS 
A Quickly Changing Variable'Star | - =.) <1.) sees 5o 
Metcalf’s Comet 19064 ‘ 7) 359 
The Eruption of Matavanu in Savaii, 1905- 6.  (Mlus- 
trated.) . So 
Research in Tropical ‘Medicine and Hygiene. By 
Profakegh. itewlett.- 351 
Presidential Addresses at the New York Meeting ; 
of the American Association . . Silo 2 352 
University and Educational Intelligence > ty Cues SO 
Societies.and Academies). .)-) Jiu. ») «le Ghee ST, 
360 
