144 
NALORE 
[June 8, 1899 
author, can only arise from a true fermentation, and in accord- 
ance with this view alcohol was obtained from such stems.— 
The guidroa, the caoutchouc tree of Madagascar, by M. Henri 
Jumelle. An examination of the guidroa showed that it clearly 
belongs to the genus A/ascarenhasia ; but, as it does not exactly 
agree with any of the fifteen or sixteen species actually known, 
the name J/. velutina is proposed for the plant.—On the 
parasitism of Xzmenta americana, by M. Edouard Heckel.— 
On some rhyolites from Somaliland, by M. A. Lacroix.—On 
the eruptive rocks of Cape Blanc (Algeria), by MM. L. Dupare 
and E. Ritter. Microscopic and chemical examination of the 
voleanic rocks of Cape Blanc show them to be neo-volcanic 
quartz-porphyry of a basic character.—On the existence in the 
blood of animals of a substance preventing the coagulation of 
milk, by M, A. Briot. Blood serum from the horse contains 
a substance capable of neutralising the effects of a certain 
quantity of rennet. This substance is of a diastatic nature, 
since it cannot be dialysed, is destroyed by heat, and can be 
precipitated by ammonium sulphate and by alcohol. 
DIARY OF SOCIETIES. 
THURSDAY, June 8. 
Royat Society, at 4.30.—Meeting for Discussion.—Szbyect: On Pre- 
ventive Inoculation : introduced by M. Haffkine. 
MAcHEMATICAL SociETy, at 8.—On Solitary Waves, Equivoluminal and 
Irrotational, in an Elastic Solid: Lord Kelvin, G.C.V.O.—On Several 
Classes of Simple Groups: Dr. G. A, Miller.—The Transmission of Stress 
across a Plane of Discontinuity in an Isotropic Elastic Solid and the 
Potential Solutions for a Plane Boundary: Prof. J. H. Michell.—On 
Theta Differential Equations and Expansions: Rev. M. M. U. Wilkin- 
son.—Finite Current Sheets: J. H. Jeans.—On a Congruence Theorem 
having reference to an Extensive Class of Coefficients ; and on a Set of 
Coefficients analogous to the Eulerian Numbers: Dr. Glaisher, F.R.S.— 
(1) The Reduction of a Linear Substitution to its Canonical Form ; (2) On 
the Integration of Systems of Total Differential Equations: Prof. A. C. 
Dixon. 
FRIDAY, June o. 
Roya AsTronomicat Society, at 8.—Further Investigation concerning 
the Position Error affecting Eye-Estimates of Star Magnitudes: A. W. 
Roberts.—Equatorial Comparisons of Jupiter, Uranus and Neptune 
with certain Stars in Newcomb’s Standard Catalogue: John Tebbutt.— 
Note on the Nebula N.G.C. 6535 : W. H. Robinson.—Prodable Paper : 
ae Ephemeris of Two Situations in the Leonid Stream: G. Johnstone 
toney. 
PuysIcat Society, at 5.—On the Distribution of Magnetic Induction in a 
Long Iron Bar: C. G. Lamb.—On the Absolute Value of the Freezing- 
Point: J. Rose-Innes, 
MaLacotoaicat Sociery, at 8.—Description of a New Species of Unio 
from the River Pahang: E. A. Smith.—Notes on Holocene Deposit at 
the Horseshoe Pit, Colley Hill, Reigate: Rev. R. Ashington Bullen.— 
Anatomical Notes on Medyla insculpta, Pfr. : Henry Suter. 
SATURDAY, June to. 
EOLOGIsTS’ Assoc1aTion.—Excursion to Rickmansworth and Harefield. 
Directors: W. Whitaker and John Hopkinson. 
ue MONDAY, Jone 12. 
Rontcen Society, at 8.—Portable Réntgen Apparatus. for Field and 
Ward Work, to be demonstrated and described by Major Beevor, J. 
Hall Edwards, and H. W. Cox.—A New Stereoscope to be demon- 
strated for Mr. Gregory by F. W. Watson Baker.—Dr. Walsh will also 
show a New Stereoscope. 
TUESDAY, June 13. 
ANTHROPOLOGICAL INSTITUTE, at 8.30.—Prehistoric Man in the Neigh- 
pourhead of the Kent and Surrey Border: Neolithic Age: George 
inch. > 
ROE PHOTOGRAPHIC SociETY, at 8.—Acetylene: Prof. Vivian B. 
ewes. 
THURSDAY, JuNE 15 
Royat Society, at 4.—Prof. A.: Michelson will read a Paper.—The 
Colour Sensations in Terms of Luminosity: Captain Abney, F.R.S.—A 
Comparison of Platinum and Gas Thermometers at the International 
Bureau of Weights and Measures at Sévres: Dr. J. A. Harker and Dr. 
P. Chappuis.—On a Quartz-Thread Gravity Balance: R. Threlfall, 
F.R.S.—On the Orientation of Greek Temples, being the Results of some 
Observations taken in Greece and Sicily, in May, 1898: F. C. Penrose, 
F.R.S.—A Preliminary Note on the Life-History of the Organism found 
in the Tsetze Fly Disease: Dr. H. G. Plimmer and Dr. T. Rose Bradford, 
F.R.S.—And other Papers. 
Linnean Society, at 8.—Contributions to the Natural History of Lake 
Urmi and its Neighbourhood: R. T. Giinther.—A Systematic Revision 
of the Genus Najas: Dr. A. B. Rendle.—On the Anatomy and System- 
atic Position of some Recent Additions to the British Museum Collection 
of Slugs: Walter E. Collinge.—The Edwardsia Stage of Lebrunia, and 
the Formation of the (Esophagus and Gastro-ccelomic Cavity: J. E. 
Duerden. 
Cuemicat Society, at 8.—Ballot for the Election of Fellows.—On the 
Decomposition of Chlorates, with special reference to the Evolution of 
Chlorine and Oxygen: W. H. Sodeau.—The Action of Hydrogen 
Peroxide on Formaldehyde: Dr. A. Harden.—Homocamphoronic and 
Camphononic Acids: A. Lapworth and E, M. Chapman.—Action of 
Silver Compounds on a-Dibromocamphor : A. Lapworth.—-The Colouring 
Matter of Cotton Flowers : A. G. Perkin —Experiments on the Synthesis 
of Camphoric Acid: H. A. Auden, W. H. Perkin, jun., and J. L. Rose.— 
Methylisoamylsuccinic Acid, Part I.: W. T. Lawrence. y 
NO. 1545, VOL. 60] 
BOOKS, PAMPHLETS, and SERIALS RECEIVED. 
Booxs.—The Hereford Earthquake of December 17, 1896: Dr. C. 
Davison (Birmingham, Cornish).—Physikalisches Praktikum: E. Wiede- 
mann u. H. Ebert, Vierte Auflage (Braunschweig, Vieweg).—Tables for 
Quantitative Metallurgical Analysis: J. J. Morgan (Griffin).—Royal Uni- 
versity of Ireland Exam. Papers, 1898 (Dublin).—Year-Book of Photo- 
graphy (9 Cecil Court).—A Country Sehnolmsten: James Shaw, edited 
by Prof. R. Wallace (Edinburgh, Oliver).—I Batteri Patogeni: Dr. N. 
Ottolenghi (Torino, Rosenberg).—Sieroterapia e Vaccinazioni Preventive 
contro la Peste bubbonica: Dr. A. Lustig (Torino, Rosenberg).—The 
Elements of Practical Astronomy: W. W. Campbell, 2nd edition (Mac- 
millan).—Bergens Museum. Report on Norwegian Marine Investigations, 
1895-97 : Hjort, Nordgaard, and Grann (Bergen).—Iist of the Genera and 
Species of Blastoidea in the British Museum (Natural History) (London), 
—Chimie Végétale et Agricole: Prof. Berthelot, 4 Vols. (Paris, Masson).— 
Sewer Design: H. N. Ogden (Chapman).—The Steam Engine and Gas 
and Oil Engines: Prof. J. Perry (Macmillan).—The Dog: edited by 
Piepe and Furneaux (Philip).—An Account of the Deep-Sea Ophiuroidea 
collected by the R.I.M.S. Ship /zvestigator: R. Koehler (Calcutta).— 
Traité Elementaire de Mécanique Chimique: Prof. P. Duhem, Tome iv. 
(Paris, Hermann).—U.S. Geological Survey, 18th Annual Report, Part 2, 
Part 5 (Washington). 
PampuHLets.—Die Methode der Variationsstatistik: G. Duncker 
(Leipzig, Engelmann).—Das Hypsometer als Luftdurckmesser, &c.: H. 
Mohn (Christiania, Dybwad).—Summary Report of the Geological Survey 
Department, 1898 (Ottawa).—Mauritius Magnetical Reductions: T. F. 
Claxton (Mauritius).—Protokoll iiber die yom 31 Marz bis 4 April, 1898 zu 
Strassburg i.E. abjgehaltene erste versammlung der Internationalen 
Aéronautischen Commission (Strassburg).—Picture Taking and Picture 
Making (Kodak Press).—Natural History of the Musical Bow: H. Balfour, 
Primitive Types (Oxford, Clarendon Press).—Thatsachen und Auslegungen 
in Bezug auf Regeneration: A. Weissmann (Jena, Fischer).—La Naviga- 
tion a Vapeur sur le Haut Yang-Tse: R. P. S. Chevalier (Chang- Hai). 
SeERIALS.—Journal of the College of Science, Imperial University of 
Tokyo, Japan, Vol. xi. Part 2 (Tokyo).—Proceedings of the Washington 
Academy of Sciences, Vol. i. pp. 15-106 (Washington).—Johns Hopkins 
University, Studies in Historical and Political Science, Series xvii. Nos. 4 
and s (Baltimore) —Monthly Weather Review, February (Washington).— 
Boletim do Musen Paraense, December (Para).—Societ&a Reale di Napoli, 
Atti della Reale Accademia delle Scienze Fisiche e Matematiche, serie ii. 
Vol. ix. (Napoli).—Contemporary Review, June (Isbister).—Century 
Magazine, June (Macmillan) —Humanitarian, June (Duckworth).—Photo- 
gram, June (Dawbarn).—Knowledge, June (Witherby),—Journal of the 
Chemical Society, June (Gurney).—Journal of the Marine Biological 
Association, June (Dulau).—Middlesex Hospital Journal, May (London).— 
Zeitschrift fiir Physikalische Chemie, xxix. Band, 1 Heft (Leipzig).— 
Journal of Botany, June (West).—Madras Government Museum, Bulletin 
Vol. 2, No. 3 (Madras).—An Illustrated Manual of British Birds: H. 
Saunders, 2nd edition, Parts 16 to 20 (Gurney.)—Fortnightly Review, June 
(Chapman).—Scribner’s Magazine, June (Low).—Anglo-American Maga- 
zine, June (Anglo-American Publishing Company). 
CONTENTS. PAGE 
Man; Past ‘and Presentua byte. lz. |. >. +.) see 
Practical Geometry. ByiGeS.Ma =. ~ .s) «suena 
Our Book Shelf :— 
Thompson: ‘* Michael Faraday: his Life and 
Work???) 0.70.2 aero 8 Re er 
Biitschli: ‘* Untersuchungen iiber Strukturen.”— 
iA. M.. 2). s, yeaa) ose 6) Gee Reed 
Quinn: ‘‘ A Manual of Library Cataloguing” . . . 124 
Letters to the Editor :— 
Strawberry Cure for Gout.—F. G. ....... . 125 
Distant Sounds. —W. F..Sinclair . ...... . 125 
The Jubilee of Sir George Gabriel Stokes. (///us- 
brated.) 9...) CERISE Sey os”... eee 
Centenary of the RoyalInstitution. ...... 129 
Lhe Height. ofthe Auroratege << toc: -, -) see gO 
The Total Eclipse of the Sun, May 1900 . . . . . 133 
Notes. (///ustrated.)} RECON io, © 133 
Our Astronomical Column :— 
Gomet-1899) a \(Swift)ige seem ewe ces 136 
The Royal Observatory, Greenwic oe | LS eS 6) 
Spurious Earthquakes. (W2zth Diagram.) By Dr. 
Charles Davison’. geen een aah -sis + seo 
Report of the London Technical Education Board 141 
University and Educational Intelligence 141 
Societies and Academies. (///ustrated.) . 142 
Diaryjof, Societies. 4 syeesuenene Ee ees 3 eS 
Books, Pamphlets, and Serials Received... .. 144 
