330 
NALURE 
{| JANUARY 31, 1907 
essential oil in a living plant: Eug. Charabot and. G. 
Laloue. An examination of the plant Artemisia 
absynthium.—The pharmacodynamical action of a new 
alkaloid contained in the root of fresh valerian: J. 
Chevalier.—The formation of ihe skeleton in some of 
the hexacorals: Armand Krempf.—The part belonging to 
the anastomotic branch of the spinal in the physiological 
properties of the pneumo-gastric or pneumoc-spinal nerve : 
F. X. Lesbre and F. Maignon.—Some new experiments 
concerning the pathology of pulmonary anthtacosis: G. 
Kuss and E. Lobstein. Further experiments bearing on 
the criticisms of MM. Calmette, Grysez, and Vansteen- 
berghe. The conclusions drawn from this work are that 
ordinary pulmonary anthracosis, as arising in ordinary 
life, is produced by inhalation and not by deglutition.— 
The evolution of the Cerithidee in the Middle and Upper 
Eocene of the Paris basin: Jean Boussac. 
GOTTINGEN. 
Royal Society of Sciences.—The Nachrichten (physico- 
mathematical section), parts iii. and iv. for 1906, contains 
the following memoirs communicated to the society :— 
May 12.—The motion of an electron under the influence 
of a longitudinally directed force: Paul Hertz. 
March 31.—Physics without apparatus; attraction and 
repulsion of unelectrified bodies. Electrical experiments 
with a polished table surface: W. Holtz. 
May 5.—The imaginary zeros of the hypergeometric func- 
tion: A. Hurwitz. 
June 16.—Calorimetric studies, i., specific heats of pure 
alcohol, and of mixtures of alcohol and water: E. Bose. 
July 28.—Calorimetric studies, ii., thermal anomalies in 
alcoholic mixtures; iii., relations between the foregoing 
results (i. and ii.) : E. Bose.—Seismic records in Géttingen 
during 1905: G. Angenheister. 
May 19.—A characteristic property of the Klassenkérper 
(Abelian functions): Ph. Furtwangler. 
October 27.—Statistical review of the local and remote 
earth tremors recorded at the Samoa Observatory during 
1905: F. Linke. 
July 28.—Principles of a general theory of linear integral 
equations: D. Hilbert. 
DIARY OF SOCIETIES. 
THURSDAY, January 3t. 
Rovat Soctery. at 4.30.—On the Two Spectra of the Elements as Evidence 
of the Composite Nature of the Atoms: Prof. W.N. Hartley, F.R.S.— 
On the Explosion of Pure Electrolytic Gas: Prof. H. B. Pixon, F.R.S., 
and L. Bradshaw.—The Firing of Gaseous Mixtures by Compression: 
L. Bradshaw.—A Recording Calorimeter for Explcsions: Prof. B. 
Hopkinson.—On the Discharge of Negative Electricity from Hot 
Calcium: Dr. F. Horton. 
Rovat [nstiTuTIoN, at 3.—Standards of Weights and Measures: Major 
Percy A. Macmahon, F.R.S 
FRIDAY, Fenruary 1.* 
Royav INSTITUTION, at 9.—The Methods of Combating the Bacteria ot 
pe in the Interior of th= Organism: Sir Almroth E. Wright, 
Geovoais7s’ ASsoctaTION, at 7.30.—President’s Address: On the Consti- 
tution and Management of Scientific Societies. 
MONDAY, FEBRUARY 4. 
Lonpon InstitTuTION, at 5.—Throngh Savage Europe: Harryde Windt. 
Society or Arts, at 8.—Gold Mining and Go.d Production: Lode 
Mining: Prof. J. W. Gregory, F.R.S. 
Socrery or CHEMICAL INDUSTRY. at 8.—(1) The Chemical Composition of 
some Motor Tyre Rubbers ; (2) On t:é Composition of some New Crude 
Rubbers: Dr. P. Schidrowitz and F. Kaye. 
Victoria INSTITUTE, at 4.30.—The Bible Pedigree of the Nations: 
M. L. Rouse. 
TUESDAY, FeBRuARY 5. 
Rovat INsTITUTION, at 3.—Survivals from the Past in the Plant World: 
Prof. A. C. Seward, F.R.S 
INSTITUTION OF CivIL ENGINEERS, at 8.—Modern Motor Vehicles: Col 
R. E. B. Crompton, C.B. 
Zootocicat Society, at 8.30.—On the Foetus of the Giraffe: Prof. E. 
Ray Lankester, F.R.S.—On New or Rare Cumacea from the Collection 
of the Copenhagen Musenin. Part i.: Dr. W. T. Calman.—Description of 
a New Amazonian Tree-Frog with Peculiar Breeding Habits: Dr. E. A. 
Goeldi. 
WEDNESDAY, Fresruarvy 6. 
Socity or Pustic Anatysts, at 8.15.—Annual General Meeting. Presi- 
dential Address.—(1) Mineral Acids in Vinegar; (2) The Composition of 
English Fermentation Vinegar: F. D. Ratcliff.—The Detection of Cane 
Sugar in Milk: W. H. Anderson. 
SocipTy oF Arts, at 8.—The Principles and Practice of Insurance, 
and their Modern Developments: T. EK. Young. 
GEOLOGICAL SuciEry, at 8.—Note on the Cervical Vertebra of a Zeuglodon 
from the Barton Clay of Barton Cliff (Hampshire): Dr. C. W. Andrews, 
NO. 1944, VOL. 75] 
F.R.S.—On the Origin‘and Age of, the Plateaus around Torquay (South 
Devon): A. J. Jukes-Browne. 
Entromotocicat Society, at 8.—Notes on the Indo-Australian Papil- 
ionida : Percy I. Lathy. ‘ ; Ve 
THURSDAY. FEBRUARY 7- 
Roya Society, at 4.30.—Probable Papers: 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 Mi 
Greenwood, jun.—On the Combining Properties of the Opsonin of an 
Immune Serum: Prof. R. Muir and W. B. M. Mariin.—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, R.A.M,C.— 
Observations on the Life-History of Leucocytes, Part ii., On the Origin ot 
the Granules: C. E. Walker. 
Royat INsTiruTION, at 3.—Standards of Weights and Measures: Major 
P. A. Macmahon, F.R.S. 
Linnean Society, at 8.—Pafers: New Plants from Malaya: Dr. € ito 
Stapf.—Tertiary Foraminifera of Victoria: the Balcombian Depos’ . of 
Port Phillip: F. Chapman.—Z-xhzbitions: Specimens of Chava ori to- 
poda: H. and J. Groves.—Some Observations of Climbing Plants , ith 
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 Aminc-azo-compounds, Part vi., the Partially Methylated 4: 6- 
Diamino-7-xylenes: G. T. Morgan and F. M. G. Micklethwait.— 
(1) The Redu tion 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-Menthylearbamic 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.—(1) On the Ab-orption Spectra 
of Benzoic Acid, the Benzoates and Benzamide; (2) The Absorption 
Spectra of Phthalic, zsoPhthalic and Terephthalic Acids: Phthalic 
Anhydride -and Phihalimide: W. N. Hartley and E. P. Hedley,—aay- 
Trimethyl- and aayy-Tetramethyl-tricarballylic Acids and aA-Dimethyl- 
butane aBA-Tricarboxylic Acid: H. Henstock and C. H. G. Sprankling. 
—A Reactin 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: 
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. 
CONTENTS. PAGE 
The Plant as Machine. By Dr. F. F. Blackman, 
) OF) EO aN ON Ch A Scot omen oo Ske 
The Norsemen in the Orkneys. By J. W. Cursiter. 315 
Organic Chemistry for Students. By G. Y. of ee 
Some Opinions on Teaching Mechanics. By 
(Che: Oe - mE ret ea: B54 s! O OREOREM Co Se 
Our Book Shelf:— 
Joseph: ‘‘What are We?” . 318 
Hough and Sedgwick: ‘*‘ The Human Mechanism, its 
Physiology and Hygiene and the Sanitation of its 
Surroundings” res ecestes| 2! aoe 
Arnoux: * Arithmétique graphique. Introduction a 
lV Etude des Fonctions arithmeétiques” . . . . . . 319 
Boulger’:| ‘“Hattilian Dreesiy 7 2 2° 7! J) eT 
Letters to the Editor:— 
Radium and Geology.—Prof. W- J. Sollas, F.R.S. 319 
The Mathematical:Tripos.—Dr. Edward J. Routh, 
318 
FIR: Sih ae a ae 2) 320 
Fertilisation of Flowers by Insects. —E. W. Swan- 
ton; Dr. Alfred R. Wallace, F.R.S.. .. . . 320 
The Immortality of the Protczoa.—J. Shawcross . 320 
Perception of Relief by Monocular Vision.—A. E, 
Sinith Met a are. DR eee 
The Ruwenzori Boundary Dispute 
3 os eda Tat ga 
The Art of the Lapidary. (J///ustrated.) By J. W.J. 321 
Notes. 9 (Wizatrated. ji. =). « ve) oy ee 
Our Astronomical Column :— 
The Recent Total Eclipse ofthe Sun ...... . 326 
Dhe‘SolarsRadiation:. «.. |. -.) is) Lee eet eee 
Photographs of Giacobini’s Comet (1905¢) . . . . . 326 
The Red Spot on Jupiter, 1905-6... . .. . 327 
A Peculiar Short-period Variable (155.1906 Cassiopeize) 327 
The British Science Guild ..... Bie sy) 
American Fossil Cycads. (J///ustrated.) By A.'C. S. 329 
The Recent High Barometer... . AT ATSE eg RO, 
StariCatalogues. ‘By W.%E. RP. ..). 2). 2s eae 
University and Educational Intelligence . . . . 332 
Societies and Academies. ..... Phonetics wales 
Diary /ofiSocreties): 205. 2). 0 cee ee eee te SO 
