Front Matter

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PHILOSOPH ICAL

TRANSACTIONS

OF THE

ROYAL SOCIETY OF LONDON.

SERIES A

CONTAINING PAPERS OF A MATHEMATICAL OR PHYSICAL CHARACTER.

VOL. 191.

LONDON:

PRINTED BjY HARRISON AND SONS, ST. MARTIN S LANE, W.C.,

ixntts in~ 4@rbiunat to Box Alajesi.

I1898.



WORKS PUBLISHED BY THE ROYAL SOCIETY.

PHILOSOPHICAL TRANSACTIONS. For prices of the parts remaining in print see end of Volume. (The Memoirs are also published separately by Dulan and Co., Soho Square.)

INDEXES to the PHILOSOPHICAL TRANSACTIONS: from Vols. 1 to 120. Three Parts, 4to. Part I. 21s., Part II. 12s., and Part III. 5s.

ABSTRACTS of the PAPERS COAMM1UNICATED to the ROYAL SOCIETY. Vols. I to 4, 8vo, at 7s. 6d.; Vol. 5, 10s.; Vol. 6, 6s.

PROCEEDINGS of the ROYAL SOCIETY of LONDON, being a continuation of the Series entitled Abstracts of the Papers communicated to the Royal Society of London." Vols. 8, 11, 12, 13, 16 to 58,

21s. each, cloth. Vol. 59 in course of publication.

CATALOGUE OF THE SCIENTIFIC BOOKS IN THE LIBRARY OF THE ROYAL SOCIETY. PART 1.-Containing Transactions, Journals, Observations and Reports, Surveys, Museums. 5s. PART II.-General Science. 15s.

(This Catalogue is sold at a reduced price to Fellows of the Royal Society.)

CATALOGUES of the MISCELLANEOUS MANUSCRIPTS and of the MANUSCRIPT LETTERS in the possession of the ROYAL SOCIETY. 8vo. 2s.

CATALOGUE of the PORTRAITS in the possession of the ROYAL SOCIETY. 8vo, 1860. Price Is.

LIST of PORTRAITS and BUSTS, and CATALOGUE of MEDALS in the possession of the Royal Society. 8vo, 1892. Price is.

LIST of the FELLOWS of the ROYAL SOCIETY (Annual). 4to. 1s.

SIX DISCOURSES delivered at the Anniversary Meetings of the Royal Society on the Award of the Royal and Copley Medals: by Sir HIJMPHRY DAVY, Bart., President. 4to. 3s.

ASTRONOMICAL OBSERVATIONS made by the Rev. THOMAS CATTON, B.D., reduced and printed under

the superintendence of Sir GEORGE BIDDELL AIRY, Astronomer Royal. Price 2s., sewed.

MARKREE CATALOGUE OF ECLIPTIC STARS. Four volumes, roy. 8vo, cloth. 5s. each.

NVow Ready.-Demy Svo, pp. 172. Price 5s.

THE YEAIR-IBOOK OF THE ROYAL SOCIETY, 1897-8.

Containing an Account of the Chief Events and Arrangements of the Year.

N-ow Ready.-Deniny Svo, pp. 224. Price 7s. 6d.

THE RECORD OF TH1E ROYAL SOCIETY, 1897.

Containing an Account of the Foundation, History, &c., of the Society.

SOLD BY HARRISON AND SONS, ST. MARTIN'S LANCE,

AND ALL BOOKSELLERS.



[ iii I

CONTENTS.

(A)

VOL. 19 1.

Advertisement. page vii List of Institutions entitled to receive the Philosophical Transactions or Proceedings of the Royal

Society .. ix

I. Memioir on the Integration of Partial Diffierential Equations of the Second Order in Three Inclependent Variables whei an Intermediary Integral does not exist in general. By A. R. FORSYTH, F.R.S., Sadlerian Professor in the Univer- sity of Gambridge .page 1

II. On the Change of Absorption produced by Fluorescence. By JOHN BURKE,

M.A., Berkeley Fellow of the Owens College, Manchester Communicated by Professor ARTHTUR SCHUSTER, F.R. S. 87

III. On the OccIusion of IIydriogen and Oxygen by Palladium. By LUDwI(G MOND,

Ph.lD., F.JR.S, WILLIAM IRAMSAY, Ph.D., F.J?.S., and JOHN SHIELDS, D.Sc., Ph.D. 105

IV. Comparative Photographic Spi)ectra of Stars to the 3-l Magnitude. By FRANK MCCLEAN, F.R.S. 127

V. On the Alpplication of Harmonic Analysis to the Dynamical Theory of the Tides. -Part II. On the G*everal Integration of LAPLACE'S Dynamical Equations. By S. S. HOUoue, M.A., Fellow of St. John's College and Isaac Newton Student in th University of cambridge. co7mmnicated by Professor G. I. DARNSIN, F.I?1.S. O. .. 1 . ee*?o@ 39

a 2



[ iv ]

VI. Electrification of Air, of Vapour of Wa(dter, ai of (Oher GWases. By Lord KELVIN, G. .V.O., F.R.S., MIAGNUS MACLEAN, D. S., F.R.S.E., and ALEX-

ANDER GALT, B.Sc., ]FKR.SS.E . page 187

VII. Mathematical Contributions to the Theory of Evolutior&.-IV. On the Probable Errors of Frequency C(onstan ts and on the Jluttence of JRanclom Selection 0o Variation and Correlation. By KA-111, PEARSOJ .'s-, F.R.8I , and L. N. G. FILON,

B.A., University College, London 229

VIII. A Compensated Inteftrence. Dilatomneter. By A. L. TUTTON, Assoc. R.C.S. Communicated by Capt. ABNEY, C.B., IKAR. ZS 3 1 3

T X. The Electric Conductivity Of Nitric Acid. By V. H. VELEY, 1. A., F.R. S., and J. J. MANLEY, Dcubeny curator, Mllfagdalen College, Oxford 365

X. On the Thermal Conductivities of Single and Mi ed Solids and Liquids and their Variation with Temqpercuature. By CITARLES H:. LEES, D.Sc., Assistant Lec- turer in Physics in the Owens College. Comm unicated by Professor ARTHUR

SCHUSTER, F. RS .S. . . . .. 6 399

XI. Experiments on Aneroid Barometers at Kew Ob Cservatory, and their Discussion.

By C. -CHREE, Se.D., LL.D., F .R.S., Superiintendeqit. Communicated by the Author at the Request of the Kew Observatory Committee . . . . 44 L

XII. On the Heat Dissipated by a Platinum Stiface at High Temperatures. By J. E. PETAVEL, 1851 Exhibition Scholar. Comm niunicated by Lord RAYLEIGH,

F. R. S . . * o s s * e e e * * v 50 1

index to Volume .52* . . a . . . . e 525



[v] Lv

LIST OF ILLUSTRATIONS.

Plates 1 to 1 7.--Mr. F. MCCLEAN on the Comparative Photographic Spectra of Stars to the 3 Magnitude.

Plates 18 to 23.-Mr. J. E. PETAVEL on the Heat Dissipated by a Platinum Surface at High Temperatures.



Svii1

ADVERTISEMENTO

THE Committee appointed by the Royal Society to direct the publication of the

Philosophical Transactions take this opportunity to acquaint the public that it fully

appears, as well from the Council-books and Journals of the Society as from repeated

declarations which have been made in several former Transactions, that the printing of

them was always, from time to time, the single act of the respective Secretaries till

the Forty-seventh Volume; the Society, as a Body, never interesting themselves any

further in their publication than by occasionally recommending the revival of them to

some of their Secretaries, when, from the particular circumstances of their affairs, the

Transactions had happened for any length of time to be intermitted. And this seems

principally to have been done with a view to satisfy the public that their usual

meetings were then continueLd, for the improvement of knowledge and benefit of

mankind: the great ends of their first institution by the Royal Charters, and which

they have ever since steadily pursued.

But the Society being of late years greatly enlarged, and their communications more

numerous, it was thought advisable that a Committee of their members should be

appointed to reconsider the papers read before them, and select out of them such as

they should judge most proper for publication in the future Transactions; which was

accordingly done upon the 26th of March, 1752. And the grounds of their choice are,

and will continue to be, the importance and singularity of the subjects, or the

advantageous manner of treating them; without pretending to answer for the

certainty of the facts, or propriety of the reasonings contained in the several papers

so published, which must still rest on the credit or judgment of their respective

authors.

It is likewise necessary on this occasion to remark, that it is an established rule of the Society, to which they will always adhere, never to give their opinion, as a Body,



E viii. upon any subject, either of Nature or Art, that co mes before them. And therefore the

thanks, which are frequently proposed from the, Clair, to be given to the authors of

such papers as are read at their accustomed meetings, or to the persons through whose

hands they received them, are to be considered in no other light than as a matter of

civility, in return for the respect shown to the Society by those communications. The

like also is to be said with regard to the several projects, inventions, and curiosities of

various kinds, which are often exhibited to the Society; the authors whereof, or those

who exhibit them, frequently take the liberty to report, and even to certify in the

public newspapers, that they have met with the highest applause and approbation.

And therefore it is hoped that no regard will hereafter be paid to such reports and

public notices; which in some instances have been too lightly credited, to the

dishonour of the Society.



F ix ]

1898.

I-AST OF INSTITUTIONS ENTITLED TO RECEIVE THE PHILOSOPHICAL TRANSACTIONS OR

PROCEEDINGS OF THE ROYAL SOCIETY.

Institutions marked A are entitled to receive Philosophical Transactions, Series A, and Proceedings.

B ,, ,, ,, ,, Series B, and Proceedings. AB , , ,, ,, Series A and B, and Proceedings.

Proceedings only.

America (Central). Mexico.

p. Sociedad Cientifica "Antonio Alzate." America(North). (See UNITED STATES and CANADA.)

America (South). Buenos Ayres.

AB. Museo Nacional. Caracas.

B. University Library. Cordova.

AB. Academia Nacional de Ciencias. Demerara.

p. Royal Agricultural and Commercial Society, British Guiana.

La Plata. B. Museo de La Plata.

Rio de Janeiro. p. Observatorio.

Australia. Adelaide.

p. Royal Society of South Australia. Brisbane.

p. Royal Society of Queensland. Melbourne.

p. Observatory. p. Royal Society of Victoria. AB. University Library.

Sydney. p. Australian Museum. p. Geological Survey. p. Linnean Society of New South Wales. AB. Royal Society of New South Wales. AB. University Library.

Austria. Agram.

p. Jugoslavenska Akademija Znanosti i Um- jetnosti.

p. Societas Historico-Naturalis Croatica. VOL. CXCT.-A.

Austria (continued).

BrILin.

AB. Naturforschender Verein.

Gratz. AB. Naturwissenschaftlicher Verein Mur Steier-

mark.

Innsbruck. AB. Das Ferdinandeum. p. Naturwissenschaftlich - Medicinischer

Verein. Prague.

A.B. Kdnigliche Bohmische GeselIschaft der Wissenschaften.

Trieste. B. Museo di Storia Naturale. p. Society Adriatica di Scienze Naturali.

Vienna. p. Anthropologische Gesellsehaft. AB. Kaiserliche Akademie der Wissensebaften. p. K.K. Geocraphische Gesellschaft. AB. K.K. Geologische Reichsanstalt. Bs K.K. Naturhistorisches Eof-IMuseura. B. K.K. Zoologisch-Botanische Gesellsehaft. p. Oesterreichische Gesellsehaft fUr Meteoro-

logie. A. Von Kuffner'sche St-ernwarte.

Belgium.

Brussels. B. Academie Royale de Medecine. AB. Acaderaie Royale des Sciences. e. Musee Royal d'Histoire Natarelle de

Belgique. p. Observatoire Royal. p. Society Belge de Geologie, de Paleonto-

logie, et d'Hydrologie. p. Society Malacologique de Belgique.

Ghent. ABl. University.



Irx] Belgium. (continued).

Lie~gee Al. Societe des Sciences. p?. Societe Geologique de Belgiqse.

Louvain, B. Laboratoire de Microscopie et de Biologie

Cellulaire, AB. University.

C anada. Hamilton,

p. Hamilton Association. Montreal.

AS. McGill University. p. Natural History Society.

Ottawa. AB. - Geological Survey of Canada. ASB. Royal Society of Canada.

Toronto. p Astronomical and Physical Society. p Canadian Institute. AB. U diversity.

Cape of Good Hope. A. Observatory. AB. South African Library.

Ceylon. Colobnbo.

B. Museum. China.

Shanghai. p. China Branch of the Royal Asiatic Society.

Dcenmark. Copenhagen.

AS. Kongelige Danske Videnskab rnes Selskab.

Egypt.

Alexandria. AB. Bibliothecque iMunicipale.

England and Wales.

Abcrystwith. AS. University College.

Bangor. AS. University College of North Wales.

Birminghamn.

AB. Free Central Library.

AS. Mason College.

'. Philosophical Society. Bolton

Public Library. Bristol.

p. Merchant Venturers' School. AS. Uni'Versity College.

Cambridge. AB. Philosophical Society.

p. Union Society.

England and Wales (continued). Cooper's Hill

AB. Royal Indian Engi4neering College.

Dudley. p. Dudley and Midland Geological and

Scientific Society. Essex.

p. Essex Field Club.

Falmouth. p. Royal Cornwall Polytechnic Society.

Greenwich. A. Royal Observatory.

Kew.

B. Royal Gardens.

Leeds. p. Philosophical Society. AB. Yorkshire College.

Liverpool. A. Frec Public Library.

p. Litelary and Philosophical Society. A. Observatory. ABe University College.

London. AB. Admiralty. :. Anthropological Institute.

AB. British Museum (Nat. Hist.). ASB. Chemical Society. A. City Jnd Guilds of London Institute.

P. "Electrician," Editor of the. . Entomological Society.

AB. Geological Society. AB. Geological Survey of Great Britain.

Geologists' Association. AB. Guaildhall Library.

A. Institution of Civil Engineers.

p. Institution of Electrical Engineers. A. Institution of Mechanical Engineers. A. Institution of Naval Architects,

Iron and Steel Institute. AB. Kingos College. B. Linnean Society. AB. IiOBidon Institution.

p. London Library.

A. Mathematical Society. r c teoroiogical Office.

p. Odontological Society. p. Pharmaceutical Society. p. Physical Society. P. Qu ekett Microscopical Club,

-p. Royal Agricultural Society.

A. Royal Astronomical Society. B. Royal College of Physiciams. B. Royal College of Surgeonls.



F xi 1

England and Wales (continued). London (continued).

p. Royal Engineers (for Libraries abroad, six copies).

AB. Royal Engineers. Head Quarters Library. p. Royal Geographical Society.

. Royal Horticultural Society. p. Royal Institute of British Architects. AB. Royal Institution of Great Britain. B. Royal Medical and Chirurgical Society. p. Royal Meteorological Society. p. Royal Microscopical Society. p. Royal Statistical Society. A-B. Royal United Service Institution. AB. Society of Arts. p. Society of Biblical Archaology. p. Society of Chemical Industry (London

Section). p. Standard Weights and Measures Depart-

inent. AB. The Queen's Library. AB. The War Office. AB. University College. P. Victoria Institute. B. Zoological Society.

Manchester. AB. Free Library. AB. Literary and Philosophical Society. P. Geological Society. AB. Owens College.

Netley. p. Royal Victoria Hospital.

Newcastle. .AB. Free Library. p. North of England Institute of Mining and

Mechanical Engineers. p. Society of Chemical Industry (Newcastle

Section). Norwich.

p. Norfolk and Norwich Literary Institution.

Nottingham. AB. Free Public Library.

Oxford. p. Ashmolean Society. AB. Radcliffe Library. A. Radcliffe Observatory.

Penzance. P. Geological Society of Cornwall.

Plymouth. B. Marine Biological Association, p. Plymouth Institution.

Richmond. A. " Kew " Obseiavrftory.

England and Wales (continued). Salford.

p. Royal Museum and Library. Stonyhurst.

p. The College. Swansea.

AB. Royal Institution. Woolwich.

AB. Royal Artillery Library. Finland.

Helsingfors. p. Societas pro Fauna et Flora Fennica. AB. Society des Sciences.

France.

Bordeaux.

.p. Acade'mie des Sciences. p. Facnilte des Sciences. p. Society. do Meidecine et cle Chirurgie. p. Society des Sciences Physiques et

Nat-urelles. CaeII.

p. Societe6 Linne'enne de Nornmandie. Cherbourg.

p. Societe des Sciences Naturelles. Dijon.

p. Academie des Sciences. Lille.

p. Fac-alte des Sciences. Lyons.

AB. Acadeinie des SciencesBelles-Lettres etArts. A.B. Ulliversit6.

Marseilles. All. Facualtf' des Sciences.

Montpellier. AB. Academie des Sciences et Lettres. B. Faculty de Adfedecine.

Nantes. . Societe des Sciences Naturelles de lF'Ouest

de la France. Paris.

A S. Acade'mie des Sciences de l'Institut. . Association Francaise pour l'Avancemient

des Sciences. p. Bureau des Longbiudes. A. Bureau International des Poids et AMesures. p. Commission des Annales des Ponts et

Chaussees. p. Conservatoire des Arts et Mfeftiers. p). COSMOS (I\I. L'ABrE1 VALETTI).

AB. Depot de la Marine. AB. Ecole des Mines. A S. 1,cole Normale Supe'rieure. AS. IRcole Polytechnique. AB. Faculte des Sciences de la Sorbon e. A p. Jardin des Plantes.

b 2



[ xi, ] France (continued).

Paris (continued). p. U'Vlectricien. A. L'Observatoire. p. Revue Scientifique (Moins. H. DE VARIGNY)

p. Society de Biologie. Al. Society cl'iEncouragement pour l'Indlustrie

Nationale. AC1. Soci ete de Geographie. p. Soci't6 de Physique. B. Socihte Entomologique. AB. Society Geologique. p. Socikte Mlathlematique. p. Society Meteorologique de France.

Toulouse. AC. Acade'mie cles Sciences. A. Faculte des Sciences.

Germany. Berlin.

A. Deuatlsche Chemische Gesellschaft. A. Die Sternwarte. p. Gesellsehaft fur Erdkunde. A-. K6nigliche Preussische Akademie der

Wissensehaften. A. Physikalisebe Gesellschaft.

Bonn. A-B. UniversitAt.

: lemen. p. NaturwissenschaftlicherL Verein.

Bresi au. p. Schlesische Gesellsehaft fur Vaterltindische

Kultur.

Brunswick. p. Verein fur Naturwissensebaft.

Carlsruhe. See Kailisrulhe. Charlottenburg.

A. Physikalisch-Technisc:e ic heicsarstalt. Dan1zig.

AB. Naturforschende Gesellsehaft. Dresden.

_p. Terein fur ErdkuLLnde. Emden.

p. Nat-urforsehende Gesellsehaft. Erlanoen.

AB. Physikalisch-Medicinische Societit. Franklurt-am-Main.

AB. Senckenbergische Naturforschende G-esell- schaft.

p. Zoologische Gesellsehaft. Frankfurt-am-Oder.

p. Naturwissenschaftlicher Verei-n. Fi-eihurg-im-Breisgau.

AB. Universitit. Giessen.

AB. Grossherzogliche Universit.t

Germany (continued). Girlitz.

p. Naturforschencde Gesellschaft.

G ottinoo,e, AB. K6niolicho Gesellsohaft der Wissenschafte-n.

HEalle. AB. Kaiserliche Leopoldino - Carolinische

Doeutsche Akademie der Naturfosecher. . Naturwissenschaftlicher VTerein fur Sach-

son und Thluringoen. Hanmburg.

p. Naturhistorisches Museunm. AB. Naturvwissensehaftlicher Verein.

Heidelberg,. p. Natul lrlistoriisch-]vlediziinischer Verein. Ak, Udiversitit.

Jena. AB. Med icinisch-Naturwissenselb aftliche Gesell

schaft. Karisruhe.

A. Grossherzogliche Sternwarte. p. Technische Hochschule.

Kiel. p. Naturwissonschaftlicher VAereill flU

Schleswig-Holstein. A. Sternwarte.

ABS. Universitit. Kdinigsberg.

AB. Khnigliche Physikalisch - Okonomische Gesellsehaft.

Leipsic. p. Amialen der Physik und Chemie. A-B. K6ioigliche Slchsische Gesellschaft der

Wissenschaften. Magdeburg.

p. Naturwissenschaftlicher Verein.

Marburg. AS3. U nivorsitat,.

M-tinich. AS. K6nigliche Bayerische Akademie der

Wissensohaften. p. Zeitschrift f ur Biologie.

ABS. Kanigliche Theologische und Phi lo- sophische Akademie.

Potsdam. A. Astrophysikalisches Observatorium.

Rostock. AB. U niVorSitat,

Strasburg. AB. Universitat.

Tilbingen. AS3. Ulnuversitat,



I- xiii I

Germany (continued). WAUmzburg.

AB. Physikalisch-Medicinische Gesellschaft. Greece.

Athens. A. National Observatory,

Holland. (See NETHERLANDS.)

Hungary. Buda-pest.

p. Kdnigl. Ungarisehe Geologische Anstalt. AB. A Magyar Tudos Tairsasag. Die Ungarische

Akademie der Wissenschaften. llermannstadt.

p. Siebenbiirgischer VereiTl ffir die Natur- wissenschaften.

Klausenburg. AB. Az Erdelyi Muzeum.. Das Siebenbiirgisclhe

Museum.

Schemnitz. p. K. Ungarische Berg- und Forst-Akademie.

India. Bombay.

AB. Elphimistone College. p. Royal Asiatic Society (Bombay Branch).

Calcutta. AB. Asiatic Society of Bengal. AB. Geological Museum. p. Great Trigonometrical Survey of India. AB. Indian Muse m. p. The Meteorological Reporter to the

Government of India. Madras.

B. Central Museum. A. Observatory.

Roorkee. p. Roorkee College.

Ireland. Armagh.

A. Observatory. Belfast.

AB. Queen's College. Cork.

p. Philosophical Society. AB. Queen's College.

Dublin. A. Observatory. AB. National Library of Ireland. B. Royal College of Surgeons in Ireland, AB. Royal Dublin Society. AB. Royal Irish Academy.

Galway. AB. Qu-een's College.

Italy. Acireale.

p. Accademia di Scienze, Lettere ed Arti. Bologna.

AB. Accademia delle Scienze dell' Istitbto.

Catania. AB. Aceademia Gioe~nia di Scielnze Nattrali.

Florence. p. Biblioteca Nazionale Centrale. AB. Museo Botanico.

p. Reale Istituto di Studi Superiori.

Genoa. p. SocietaI Ligustica di Scienze Naturali e

Geografiche. Milan.

AB. Reale IstitAto Lombardo di Scieize, Lettere ed Arti.

AB. Society Italiana di Scienze Naturali. Modena.

p. Le Stazioni Sperimentali Agrarie Italiane.

Naples. p. Society di Naturalisti. AB. Society Reale, Accadeinia delle Scienze. B. Stazione Zoologica (Dr. DoHRN).

Padua. p. University.

Palermo. A. Circolo Matematico. AB. Consiglio di Perfezioiaanento (Soeieta di

Scienze Nat-urali ed Econoomiehe). A. Reale Osservatorio.

Pisa.

p. I1 Nuovo Cimento. p. Society Toscana di Scienze Naturali,

Rome. p. Accademia Pontificia de' Nuovi Lincei. p. Rassegna delle Sciense Geologiche in Italia. A. Reale Uffieio Centrale di Meteorologi-a e di

Geodinamica, Collegio Romano. AB. Reale Accademia dei Lineci. p. R. Comitato Geologico d' Italia. A. Specola Vaticana. AB3. Society Italiana delle Scienze.

Siena. p. Reale Accademia dci Fisiocritici.

Turin. p. Laboratorio di Fisiologia. AB. Reale Accademia delle Scienze.

Venice. p. Ateneo Veeneto. AB. Reale Istituto Veneto di Scienze, Lettere

ed Arti.



x iv I

Japan, 'Tok<io'.

A13. Imperial University.

p. Asiatic Society of Japan. Java.

Buitenzorg.

p. Jardin IBotanicl-e.

Luxembourg. Luxembourg.

p. Socie'Ut6 des Sciences Naturelles. Malta.

p. Public Library.

Mauritius,

p. Royal Society of Arts and Sciences.

Netherlands. Amnsterdam.

AB. Koninkli;jkc Akadem ievan Wetensebappen.

p. K. Zoologiscli Gcenootschap 'Natura Artis Magistra.'

Delft.

p. Ecole Polytechnique. Haarlem.

An. Hollandsche MVaatschappij der Weten-

schappen.

p. Muse'e Teyler. Leyden.

AB. University. Rotterdam.

AB. Bataafseh G-enootsehap der Proefonder-

vindelijke Wijsbegeerte. Utrecht.

AB. Provinciaal Genootschap van Kunsten en

Wetenschappen.

New Brunswick.

St. John.

p. Natural History Society.

New Zealand. Wellington.

AB. New Zealand Institute.

Norway. Bergen.

AB. Bergenske Miuseum.

Christiania.

AB. Kongelige Norske Frederiks Universitet.

Tromsoe. p. Museum.

rTrondhjem. AB. KCoongelige Norske Videnskabers Selskab.

Nova Scotia. Halifax.

p. Nova Scotian Institute of Science.

Windsor.

KP. KinTgos College Library.

Portugal. Coimbra.

AB. Universidade. Lisbon.

A-B. Academia Real clas Sciencias. p. Sec~io dos Trabalhos Geologicos de Portuigal

Oporto. p. Annaes de Scieicias Naturaes.

Russia, Dorpat.

AB. University. Irkutsk.

p. Socike? Imp6ricale Russo de Geograpbie (Section de la Sibe'rio Orientale).

Kazan. A 13. Lupersato-rsky Kazau- sky Un iversitet. p. Soci't' Physico-Mtath'inatique.

Kharkoff. p. Section Mledicale de la Societe6 dos Sciences

Experinentales, Universite de Kharkow. Kieff.

p). Society des Naturalistes. Moscow.

A. -.Le Musee Public. B. Socieet Imperiale des Naturalistes.

Odessa. p. Societe des Naturalistes de la Nouvelle-

Russie. Pulkowa.

A. Nikolai Haupt-Sternwarte. St. Petersburg.

AB. Acadc'mie Inmperiale des Sciences. B. Archives des Sciences Biologiques. AB. Conlite Geologique. p. Compass Observatory. A. Observatoire Physique Central.

Scotland. Aberdeen.

AB. University. Edinburgh.

p, Geological Society. Royal College of Physicians (Researchl

Laboratory). p. Royal Medical Society. A. Royal Observatory. p. Royal Physical Society.

. Royal Scottish Society of Arts A13 Royal Society.

Glasgow. AIAS Mitchell Free Library. p. Natural History Society P. Philosophical Society

Servia. Belggrade.

p. cadeamie Royale de Serbie.



r xv -1 Sicily. (See ITALY.)

Spain. Cadiz.

A. Instituto y Observatorio de Marina de San Fernando.

Madrid. p. Comision del Mapa Geol6gico de Espana. AB. Real Academia de Ciencitas.

Sweden. Gotten burg.

AB. Kong]. Vetenskaps och Vitterhets Samhalle.

Lund. AB. Universitet.

Stockholm. A. Acta Mathematica. AB. Kongliga Svenska Vetenskaps-Akademuie. AB. Sveriges Geologiska Unders6kning.

Upsala. AB. UlliVerSitet.

Switzerland. Basel.

p. Naturforschende Gesellsehaft.

Bern. AB. Allg. Schweizerische Gesellscbaft. p. Naturforschende GeselIschaft.

Geneva. AB. Society de Physique et d'Histoire Naturelle. AB. Institut National Genevois.

Liausanne. p. Society Vaudoise des Sciences Naturelles.

Neuchatel. p. Society des Sciences Naturelles.

Zurich. AB. Das Schweizerische Polytechnikum. p. Naturforschende G-eselIschaft. p. Sternwarte.

Tasmania. Hobart.

p. Royal Society of Tasmania.

United States. Albany.

AB. New York State Library. Annapolis.

AB. Naval Academy. Austin.

p. Texas Academy of Sciences.

Baltimore. AB. Johns Hopkins University.

Berkeley. p. University of California.

United States (continued). Boston.

AB. American Academy of Sciences. 13. Boston Society of Natural History. A. Techlnological Institute.

Brooklyn. AB, Brooklyn Library.

Cambridge. AB. Harvard University. B. Museum of Comp.arative Zoology.

Chapel Hill (N.C.). p. Elisha Mitchell Scientific Society.

Charleston. p. Elliott Society of Science and Art of South

Carolina. Chicago.

AB. Academy of Sciences. p. Field Columbian Museum. p. Journal of Comparative Neurology.

Davenport (Iowa). p. Academy of Natural Scienees.

Ithaca (N.Y.). p. Physical Review (Cornell University).

Madison. p. Wisconsin Academy of Sciences.

Mount Hamilton (California). A. Lick Observatory.

New Haven (Conn.). AB. American Journal of Science. AB. Connectidut Academy of Arts and Sciences.

Ne,-w Yorlk. p. Ainerican Geographical Society. p, American. Mathematical Society. p. American Muse-ma of Natural History. p. New York Academy of Sciences. p. New York Medical Journal. P. School of Mines, Columbia College.

Philadelphia. AB. Academy of Natural Sciences. M&B. American Philosophical Society. p. Franklin Institute. P. Wagner Free Institute of Science.

Rochester (N.Y.). p. Academy of Science.

St. Louis. p. Academy of Science.

Salem (Mass.). p. American Association for the AdvaInce-

ment of Science. AB. Essex Institute.

San Francisco. Ar.. California Academy of Sciences.



r Rvi ] United States continuedd).

Washington. AB. Patent Office. AB. Smithy sonian TIlstitutioll.

AB. U-nited States Coast Survey. B. United States Commission of Fish and

Fisheries. AB. United States Geological Survey.

United States (continued). Washington (continued).

ti). United States Naval Observatory. p. United States Department of Agricultnure. A. United States Department of Agriculture

(XWeatlher Bunreau). West Point (N.Y.)

AB. United States Military Academy.



IN-DiS SLIP.

Fo0SYT, A. R--Meinoir oil the lntegrrationi of Partial Di erential lsteattoells of the Second Order in Three independent Yarieblcs, whe an lntercietcdiary Inteci"al does not exist in general.

Phil. Trans., A, 1898, vol. 191, pp. 1-86.

Characteristic Invariant of Partial Differential Equations. FO'RSYTH, A. it. Phil. Trans., A, 1898, vol. 191, pp. 1-86.

Some new Solutions of Laplace's Equation and other Equations in Mathe- inatical Physics.

FORtsYvli, A. R. Phil. Trans., A, 1898, vol. 191, lp). 1-86.



INDEX SLIP.

BURKE, John.-On the Change of Absorption produced by Fluorescence. Phil. Trans., A, 1898, vol. 191, pp. 87-104.

Absorption, Change of, produced by Fluorescence. BU:RKE, John. Phil. Trans., A, 1898, vol. 191, pp. 87-104.

Fluorescence, Change of Absorption produced by. BURKE, John. Phil. Trans., A, 1898, vol. 191, pp. 87-104.

Photometry, Photographic Method in. BURKE, John. Phil. Trans., A, 1898, vol. 191, pp. 87-104.



INDEX SLIP.

MOND, Ludwig, 1 AMSAY, William, SHIELDS, John.-On. the Occlusion of Hydrogen and Oxygen by Palladium.


RAMSAY, William, SHIELDS, John, MOND, Ludwig-On the Occlusion of Hydrogen and Oxygen by Palladium.

Phil. Trans., A, 1898, vol. 19)1, pp. 105-126.

SHIELDS, John., MOND, Ludwig, RAMSAY, William.-On the Occlusion of Hydrogen and Oxygen by Palladium.


Density of Palladium. MOND, Ludwig, RAlSAY, William, and SHIELDS, Jo1hn1.


Occlusion of Hydrogen and Oxygen by Palladium-Nature of, Heat of, Effects of Pressure on.

MOND, Ludwig, RAMSAY, William, and SHIELDS, John. Phil, Trans., A, 1898, vol. 191, pp. 105-126.



INDEX SLIP.

MoCCLEAN, Franik.- -Comparative Photographic Spectre of Stars to the 31 Mag'nitude.

Phil. Trans., A, 1898, vol. 191, pp. 127-138,

Classification of Stars. MCCLEAN, Frank. Phil. Tr-ans., A, 1898, vol. 191, pp. 127-138.

DistribUtioll of Starls and Nebuli. MCCLEAN\, Frank. Phil. Trans., A, 1898, vol. 191, pp. 127-138.

Helium Stars, Condensation of, in Galactic Zones. MCCLEAN, Frank. Phil. Trans., A, 1898, vol. 191, pp. 127-138.

Oxygen, possible Presence in Spectra of Helium Stars. MCCLEAIN, Frank. Phil. Trans., A, 1898, vol. 191, pp. 127-138.

Spectra of Stars. MCCLEAAN, Franik. Phil. Trians., A, 1898, vol. 191, pp. 127-138.



:INThJiX SI~P.

HouCmH, S. S.--On theo Application of Harmonic Analysis to tlie Dynamical Theory of the Tides.-- P9art 1I. On the General Integration of [aAI'jACi'S llynamlical Equl aionls.


H1-armonic Analysis, applied to Tidal Theory. HOUGH, S. S. PhiL Trans., A, 1898, vol. 191, pp. 1'3.9-185.

Ocean, F'ree Oscillations of the. HOUGH, S. S. Phil. Trans., A, 1898, vol. 191, pp. 139--185.

Tides, DlynainiCal TheOry of; LAPLACIB's Theory of. Hou(.-nir, IS. S. Phil. Trans., A, 189)8, vol. 191, p)p. 130-185.



N1)IN- X -'SlP.

X tLVIN (Lord), MACLIAN. Magnus, and GALT, Al xander.z -li1ectriaioo of Air, of Vapour of Water, and of other (Gases.

Phil. Trans., A,, 1898, vol, 1.9 t1, pp 187-228.

NI C&LEAN, Mag-nas, GALT, Alexa der, and KEVWIN (Lord)-.-lectrilication of Air, of Vapour of Water, and of other Gasexs

Phil, Trnns., A, 1898, vol. 191, pp. 187-228.

GALT, Alexander, KEvIJvi (Lord), and MACLE'AN, MagIus.-Electrification of Air, of Vapour of Water, and of other Gases.

Phil. Trans., A, 1898, vol. 191, pp. i7A'28.

Electric Filters; testing Efficiency of; Diselectrifying power of, KELVIN (Lord), MIACLEAN, M., and GALT, A.

Phil. Irans., A, 1898, vol. 191, pp. 187-228.

Electrification communicated to a large quantity of Air and other" Gas~es by Water Jet; 'by electrified Needle Points; by electrified Flame by shaking with Water and with solutions of different substances.

KELVIN (Lord), MACLE AN, M., and GALT, A, Phil Trans., A, . 898, vol. 191? pp. 187-228.

Electrification $}f Air at different air-pessures; at' different electrifyirg potential; loss of electriifcation.

KELVIN (Lord), MACLIEAN, M., and GALT, A. Phil, Trans., A, LT98,'vol, I91, pp. 187-,228,

Electrified and non-electrifled Air; electrical effect of heated solids KE LVIN (Lord), MACLEAN, M., and. GALr, A.

Phil. Trans., A, 1898, vol. 191, pp. 187 -228,

Electricity, Diffusion of, from Carbonic Acid gas into Air; communication of, from electrified Steam to Air.

KELVIN (Lord), MIACLEANT M., and GALT, A. Phil. Trans., A, 1898, vol. 191, pp. 187-228.

Electric Current, measurement of, through Air, by a high resistance Mirror Galvanometer.

KELVIN (Lord), MACLEAN, M., and GALT, A. Phil. Trans., A, 1898, vol. L91, pp. 18722 8.



INI)EX SLIP.

PEARSON, Karl, and FILON, L. N. G.-Mathematical Contributions to the Theory of Evolution.-IV. On the Probable Errors of Frequency Constants and on the Influence of Random Selection on Variation and Correlation.

Phil. Trans., A, vol. 191, 1898, pp. 229-311.

FILON, L. N. G., and PEARSON, Karl.-Mathematical Contributions to the Theory of Evolution.-LI. On the Probable Errors of Frequency Constants and on the Influence of Random Selection on Variation and Correlation.

Phil. Trans., A, vol. 191, 1898, pp 229-311.

Correlation and Variation, Influence of Random Selection on. PEARSON, Karl, and FILON, L. N. G.


Evolution, Mathematical Contributions to Theory of; Influence of Random Selection on the Differentiation of Local Rlaces.

PEARSON, Karl, and FILON, L. N. G. Phil. Trans., A, vol. 191, 1898, pp. 229-311.

Probability, Theory of Errors in Frequency. PEARSON, Karl, and FILON, L. N. G.


Races, Local, Influence of Random Selection on Differentiation of. PEARSON, Karl, and FILON, L. N. G.

Phil. Trans., A, vol. 191, 1898, pp. 2294311.



INDEX SLIP.

TL TTON, A, E. --A Compensated Interference Dilatometer. Phil. Trans., A, vol. 191, 1898, pp. 313-364.

Coefficients of Thermal Expansion of Platinum, Iridium, Aluminium, and small Crystals.

TUTTON, A. E. Phil. Trans., A, vol. 191, 1898, pp. 313-364.

crystals, Coefficients of Thermal Expansion of, by an Interference Method. TUTTON, A. E. Phil. Trans., A, vol. 191, 1898, pp. 313-364.



INDEX SLIP.

Vnu jiy, V. H., and MANLEY, J. J.-The Electric Conductivity of Nitric Acid.

Phil. Trans., A, vol. 191,1898, pp. 365-398.

MANLLY, J. J., and VELEY, V. H.-The Electric Conductivity of Nitric Acid.


Electrolytic Cells, construction and calibration of. VELEY, V. H., and MANLEY, j. J.


Nitric Acid-preparation and. purification, properties of anhydrous acid, hydrates of, specific resistances, conductivities and temperature coefficients. VELEY, V. H., and MANLEY, J. J.




INDEX SLIP.

LEES, Charles HU--On the Thermal Conductivities of Single and Mixed Solids and Ijiquids and their Variation with Temperature.


Thermial Conduetivity, of Solids, Liquids, and Mixtures. Variation with Temperature.

LEES, Charles H. Phil. Trans., A, 1898, vol. 191, pp. 399-440.



lND)EX SLIP.

C iwli~, C.-Experiments on Aneroid Barometers at Kew Observatory, and their Discussion.


Aneroid Barometers, Experiments on.-Elastic After-effect; Secular Change; Influeence of Temperature.

C}IInI?i, C. Phil. Trans., A, 1898, vol. 191, pp. 441-499.



INDEX SLIP.

PETAVEL, J. i.-On the Heat Dissipated by a Platinum Surface at Hligh Temperatures.


Bolometer (surface), Construction of. PETAVEL, J.. Phil, Trans., A, 1898, vol. 191, pp. 501--524.

Emissivity of Platinum in Air and other Gases. PETAVEL, J. E. Phil. Trar s., A, 1898, vol. 191, pp. 501-524.

Intrinisic Brilliancy, Law of Variation with Temperature. PETAVEL, J. KE Phil. Trans., A, 1898, vol. 191, pp. 501-524.

Specific Resistance of Platin-um at its Melting Point. PETAVE L, J. E. Phil. Trans., A, 18.98, vol. 191, pp. 501524.

Thermal Radiation, Law of. PETAVEL, J. EB Phil. Trans., A, 1898, vol. 191, pp. 501 524.



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