72 
gas (15°S98), is increased to 15°878, a number sensibly in agree- 
ment with the 15°88 found by the author by the gravimetric 
method.—On the increase of pressure produced by the mixture 
of two gases, and on the compressibility of the mixture, by M. 
Daniel Berthelot. The formule proposed by the author in a 
previous paper are applied to the gas mixtures, SO,+CO,, 
N,+O., and H,+Oy,, and the results compared with the experi- 
ments of Sacerdote, Leduc, Rayleigh, and the author. The 
agreement is very close.—Researches on the separation of traces 
of bromine existing in chlorides, by M. H. Baubigny. A strong 
solution of the chloride, to which a large amount of copper 
sulphate has been added, is treated with potassium perman- 
ganate in the cold, and the whole reduced to dryness 2” vacuo. 
The whole of the bromine is thus given off, together with a 
little chlorine ; the original method proposed by the author 
and M. Rivals is then applied to this mixture. Two 
test analyses show satisfactory results, even when only ‘005 
gram of bromide was present with 12 grams of chloride.—On 
the impurities of aluminium, by M. Adolphe Minet.—On mag- 
nesium phosphide, by M. Henri Gautier. The phosphide 
Mg;P, was prepared ina pure state by.the direct combination 
of the elements in a stream ofhydrogen. Pure PH, is obtained 
on treating this with water.—On the flame of hydrogen, by 
MM. Schlagdenhauffen and Pagel. The violet-blue colour of a 
hydrogen flame obtained when the gas is prepared from zinc is 
not due to sulphur, as proposed by Salet, but selenium. Some 
selenium is invariably left behind in the residue, probably 
as lead selenide.—Hydrogenation of acetylene in presence 
of nickel, by MM. Paul Sabatier and J. B. Senderens. 
A mixture of hydrogen and acetylene acts vigorously 
~upon reduced nickel, even in the cold, ethylene, ethane, 
and liquid hydrocarbons being produced in quantity.—On 
the dextrines arising from saccharification, by M. P. Petit.— 
Method for rapidly measuring the dimensions of small objects, 
independently of their distance. Application to pupillometry 
and to laryngometry. Illusion due to the muscular sense in the 
- appreciation of the size of objects, by M. Th. Guilloz.—Patho- 
logical physiology of pregnancy, by MM. Charrin and Guille- 
monat.—The influence of freezing upon the development of the 
hen’s egg, by M. Etienne Rabaud. The eggs were not killed 
by exposure to —15°C., but the development was markedly 
affected, and that permanently.—Some remarks on the 
Haementerta costata of Miller, by M. A. Kowalevsky.—On 
the existence of a fauna of Arctic animals in the Charente at 
the Quaternary epoch, by MM. Marcellin Boule and Gustave 
Chauvet.—New researches on the caverns of Padirac, by MM. 
Armand Viré and Etienne Giraud.—On the ascent of the 
Balaschoff on March 24, by M. G. Le Cadet. 
DIARY OF SOCIETIES. 
THURSDAY, May 18. 
Roya Society, at 4.30 —Bakerian Lecture : The Crystalline Structure of 
Metals: Prof. J. A. Ewing, F.R.S., and W. Rosenhain.—The Yellow 
Colouring Matters accompanying Chlorophyll and their Spectroscopic 
Relations: C. A. Schunck.—The Diffusion of Ions into.Gases: J. S. 
Townsend.—The Diurnal Range of Rain at the Seven Observatories in 
connection with the Meteorological Office, 1871-1890: Dr. R. H. Scott, 
F.R.S, 
INSTITUTION OF ELECTRICAL ENGINEERS, at 8.—Electric Locomotivesin 
Practice and Tractive Resistance in Tunnels, with Notes on Electric 
Locomotive Design: P. V. McMahon. 
Cuemicac Society, at 8.—Corydaline, Part VI.: Dr. J. J. Dobbie and 
A. Lauder.—Oxidation of Furfural by Hydrogen Peroxide: C. F. Cross, 
B® J. Bevan, and T. Freiberg. 
FRIDAY, May to. 
RovatInstTiTuTION, at 9.—Runic and Ogam Characters and Inscriptions 
in the British Isles : The Lord Bishop of Bristol. 
EprDEMIOLOGICAL Society, at 8.30.—A Study of Enteric Fever in the 
Netherlands: Prof R. H. Saltet. 
TUESDAY, May 23. 
Roya. INSTITUTION, at 3.—Recent Advances in Geology: Prof. W. J. 
Sollas, F.R.S. c 
Roya PHOTOGRAPHIC SOCIETY, at 8.—Corea: Mrs. Isabella Bishop. 
WEDNESDAY, May 24 
GEOLOGICAL SociErTy, at 8.—On the Distal End of a Mammalian Humerus 
from Tonbridge : Prof. H.G. Seeley, F.R.S.—On Evidence of a Bird 
from the Wealden Beds of Ansty Lane, near Cuckfield: Prof. H. G. 
Seeley, F.R.S.—On the Rhyolites of the Hauraki Goldfields (New 
Zealand): J. Park and F. Rutley.—On the Progressive Metamorphism 
peseme “‘Dalradian "’ Sediments in the Region of Loch Awe: J. B. 
ill. 
NO. 1542, VOL. 60] 
NATURE 
[May 18, 1899 
THURSDAY, May 25. 
Rovat InstiTuTION, at 3.—Water Weeds: Prof. L. C. Miall F.R.S. 
FRIDAY, May 26. 
Roya Institution, at 9.—Climbs and Explorations in the Andes: 
Sir W. Martin Conway. 
PavsICAL Society, at 5.—On the Thermal Properties of Normal Pentane, 
Part 2: Prof. S. Young and Mr. Rose-Innes.—On the Distribution of 
Magnetic Induction in a Long Iron Bar: C. G. Lamb. 
BOOKS, PAMPHLETS, and SERIALS RECEIVED. 
Booxs.—Cours Elémentaire de Zoologie : R. Perrier (Paris, Masson).— 
Chapters on the Natural History of the U.S.: Dr. R. W. Schufeldt (Gay). 
—Dus Tierreich, 7 Liefg.: Profs. Canestrini and Kramer (Berlin, Fried- 
lander).—Ditto, 8 Liefg.: Prof. K. Kraepelin (Berlin, Friedlander).— 
Electromagnetic Theory : O. Heaviside, Vol. 2 (Alectrician Company).— 
The Tides Simply Explained: Rev. J. H. S. Moxly (Rivingtons).—A 
Manual of Surgical Treatment: Prof. W. W. Cheyne and Dr. F. F. 
Burghard, Part _r (Longmans).—Physique et Chimie Viticoles: A. de 
Saporta (Paris, Carré and Naud).—The Aborigines of Tasmania: H. Ling 
Roth, 2nd edition (Halifax, King). 
PAMPHLETS,—Die Elemente des Erdmagnetismus, &c. : Dr. H. Fritsche 
(St. Petersburg).—Man the Microcosm: L. Hall, Part 1 (Williams).—Die 
Lokalisation Morphogenetischer Vorgange : H. Driesch (Leipzig, Engel- 
mann).—Die Aufstellung der Tiere in Neuen Museum zu Darmstadt: G. 
von Koch (Leipzig, Engelmann).—Siebenter Jahres-Bericht des Sonnblick- 
Vereines fiir das Jahr 1898 (Wien). 
SERIALS —Science Gossip, May (Strand).—Botanische Jahrbiicher, Siebr. 
Bd. xr and 2 Heft (Leipzig).—Fortnightly Review, May (Chapman).— 
Zeitschrift fiir Physikalische Chemie, xxviii. Band, 4 Heft (Leipzig). 
—Himmel und Erde, April (Berlin).—Natural Science, May (Pent- 
land).—Journal of Botany, May (West),—Observatory, May (Taylor). 
—Journal of the Chemical Society, May (Gurney).—Geographical Journal, 
May (Stanford).—Monthly Weather Review, January (Washington).— 
Proceedings of the Royal Society of Edinburgh, Vol. xxii. pp. 361-440 
(Edinburgh).—Engineering Magazine, May (Strand).—Physical Review, 
March (Macmillan).—Scientia, No. 3 (Paris, Carré).—Journal of Applied 
Microscopy, March (Rochester, N.Y.).—L'Anthropologie, Tome x. No.2 
(Paris).—Record of Technical and Secondary Education, April (Mac- 
millan).—Memoirs of the Boston Society of Natural History, Vol. v. Nos. 4 
and 5 (Boston,.Mass.).—American Journal of Mathematics, April (Balti- 
more).—Psychological Review, May (Macmillan).—National Geographic 
Magazine, May (Washington).—American Journal of Science, May (New 
Haven).— Botanischer Jahrbiicher, Sechsr. Band, v. Heft (Leipzig). 
CONTENTS. PAGE 
Dravels in'New Guineaieu-n ace) «ss = eee eeeag) 
Our Book Shelf :— 
Smith: ‘‘The Philosophy of Memory, and other 
Essays.’—H. W.B. .. . 51 
Jung and Schréder : “Das Heidelberger Schloss und 
Seine Garten in alter und neuer Zeit und der Schloss- 
garten zu Schwetzingen.”—John Weathers . . . 52 
Wood: ‘‘Graduated Test-papers in Elementary 
Mathematics ” bc. 0) ah AOA ORI ERE Oc 
Munro: ‘‘ The Story of the British Race” ..... 52 
Letters to the Editor :— 
Fourier’s Series.—Prof. A. A. Michelson; M. 
Poincaré” . (See ere ieee cite >< Cee EE 
A Note upon Phosphorescent Earthworms.—Frank 
E- Beddard (hi RAS Sire raesmaien <! 5 ere O52 
On the Chemical Classification of the Stars. By 
Sir Norman Lockyer, K.C.B., F.R:S. .... 5: . 52 
The Use of Phosphorus in the Manufacture of 
uoifer/Matches:. teeemeee A ache: «Sa eeemSeL 
Mimicry and Warning Colours. By Prof. R. 
MeldolaFi RS. Galeries nil ce.- omic y me mnemnemma Sy 
Professor Charles Friedel. By Dr. J. H. Gladstone, 
Feiss. . AeA ots ee ICRC Lose ce oly 
Charles;Naudin: Byslvha Been. cp)... eens 
The New Buildings at South Kensington ..... 59 
INOtESaem- tii olny ioe Bech OMeMMeME 0 0) 1 ol CS) 
Our Astronomical Column :— 
Partial Eclipse of the Sun, June7 .... ..- + 63 
Gomet 1898\a(Switt)ie seen |. een OS 
Mempel’s Comet (1873) We) eeu ees- ie) =)’ eee CS 
Return of Holmes’ Comet (1892 III.) ...... . 63 
Rotation Period of Mars titer etn, (Ls. Saeeeman Od: 
An Improved Resistance-Box. (Jé//ustrated.)... . 64 
Transparency and Opacity. (Wzth Diagram.) By 
Izord Rayleigh, RaR3S See ei ei ce) Smeniemrenr nn OF 
University and EducationallIntelligence ..... 65 
Scientific Serials alte Pept cs no 66 
Societies and Academies (Zllustrated.) . : 2... . 67 
Diary of Societies. . ae 
Books, Pamphlets, and Serials Received. 8 oo owe 
