Front MatterSource: Philosophical Transactions of the Royal Society of London. B, Vol. 181 (1890), pp. i-xviiPublished by: The Royal SocietyStable URL: http://www.jstor.org/stable/91722 .

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PHILOSOPHIC

TR A-N S A C T I O N

OF THE

ROYAL SOCIETY

OF

LONDON.

(B.)

FOR THE YEAR MDCCCXC.

VOL. 181.

LONDON:

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

mtetR mn ?yhanrg Xt @jer i R tgig.

MDCCCXCI.

s

AL

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ADVERTISEMENT.

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 ime to tieme, the single act of the respective Secretaries till

n the Forty-seventh Volume; the Society, as a Body, never interesting themselves any further in their inpublication than by occasionally recommending the revival of them to

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

Tra6sactions had happened for any length of time to be intermitted. And this seems

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

meetings were then continued, 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, a 2

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[ iv ]

upon any subject, either of Nature or Art, that comes before them. And therefore the

thanks, which are frequently proposed from the Chair, 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.

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LIST OF INSTITUTIONS ENTITLED TO RECEI VE THE PHILOSOPHICAL TRANSACTIONS OR

PROCEEDINGS OF THE ROYAL SOCIETY.

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

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

s, ,, ip

America (Central). Mexico.

p. Sociedad Cio3ntifica "Antonio Alzate."

America (North). (See UNITED STATES.)

America (South). Buenos Ayres.

AB. Museo Nacional. Caracas.

B. University Library. Cordova.

AB. Academia Nacional de Ciencias. 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. Linnean Society of New South Wales. AB. Royal Society of New South Wales. AB. University Library.

Austria.

Agram. p. Societas Historico-Naturalis Croatica.

Brinn. AB. Naturforschender Verein.

Gratz. AB. Naturwissenschaftlicher Verein fiir Steier-

mark. Hermannstadt.

p. Siebenbiirgischer Verein fur die Natur- wissenschaften.

, , ,Proceedings only.

Austria (continued). Innsbruck.

AB. Das Ferdinandeurm. p. Naturwissenschaftlich - Medicinischer

Verein.

Klausenburg. AB. Az Erdelyi Muzeum. Das Siebenbiirgische

Museum.

Prague. AB. Konigliche Bdhmische Gesellschaft der

Wissenschaften. Schemnitz.

p. K. Ungarische Berg- und Forst-Akademie, Trieste.

B. Museo di Storia Naturale.

p. Societa Adriatica di Scienze Naturali. Vienna.

p. Anthropologische Gesellschaft. AB. Kaiserliche Akademie der Wissenschaften. p. K.K. Geographische Gesellschaft. AB. K.K. Geologische Reichsanstalt. B. K.K. Zoologisch-Botanische Gesellschaft. B, Naturhistorisches Htof-Museum.

p. CEsterreichische Gesellschaft fur Meteoro-

Belgiun Brusse

B.

AB.

B.

logie. 1.

als. Academie Royale de Medecine, Academie Royale des Sciences. Musee Royal d'Histoire Naturelle de

Belgique. ......

p. Observatoire toyal. p. Societ6 Malacologique de Belgiqi

Ghent. AB. University.

Liege, AB. Societe des Sciences.

p. Societe Geologique de Belgique.

1e.

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Belgium (continued). Louvain.

AB. L'Universite. Canada.

Hamilton.

p. Scientific Association. MIontreal.

AB. McGill University. p. Natural History Society.

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

Toronto.

p. Canadian Institute. AB. University.

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

Ceylon. Colombo.

B. Museum. China.

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

Denmark.

Copenhagen. AB. Kongelige Danske Videnskabernes Selskab.

England and Wales.

Aberystwith. AB. University College.

Birmingham. AB. Free Central Library. AB. Mason College. p. Philosophical Society.

Bolton. p. Public Library.

Bristol.

p. MVerchant Venturers' School.

Cambridge. AB. Philosophical Society. p. Union Society.

Cooper's Hill. AB. Royal Indian Engineering College.

Dudley. p. Dudley and Midland Geological and

Scientific Society. Essex.

p. Essex Field Club. Greenwich.

A. Royal Observatory. Kew.

B. Royal Gardens. Leeds.

p. Philosophical Society.

vi ]

England and Wales (continued). Leeds (continued).

AB. Yo-rkshire College. Liverpool.

AB. Free Public Library. p, Literary and Philosophical Society. A. Observatory. AB. University College.

London. AB. Admiralty. p. Anthropological Institute. B. British Museum (Nat. Hist.). AB. Chemical Society. p. " Electrician," Editor of the. B. Entomological Society. AB. Geological Society. AB. Geological Survey of Great Britain.

p. Geologists' Association. AB. Guildhall Library. A. Institution of Civil Engineers. A. Institution of Mechanical Engineers. A. Institution of Naval Architects. p. Iron and Steel Institute. AB. King's College. B. Linnean Society. AB. London Institution.

p. London Library. A. Mathematical Society. p. Meteorological Office.

p. Odontological Society. p. Pharmaceutical Society. p. Physical Society. p. Quekett Microscopical Club.

p. Royal Agricultural Society. p. Royal Asiatic Society. A. Royal Astronomical Society. B. Royal College of Physicians. B. Royal College of Surgeons. p. Royal Engineers (for Libraries abroad, six

copies). AB. Royal Engineers. Head Quarters Library. p. Royal Geographical Society. p. 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. AB. Royal United Service Institution. AB. Society of Arts.

p. Society of Biblical Archaeology. p. Society of Chemical Industry (London

Section).

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[ vii. ] England and Wales (continued).

London (continued). p. Standard Weights and Measures Depart-

ment. 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. 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" Observatory.

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. Societe des Sciences.

France. Bordeaux.

p. Academie des Sciences. p. Faculte des Sciences.

p. Societe de Medecine et de Chirurgie. p. Societe des Sciences Physiques et

Naturelles.

France (continued). Cherbourg.

p. Societe des Sciences Naturelles.

Dijon. p. Acad6mie des Sciences.

Lille. p. Faculte des Sciences.

Lyons. AB. Academie des Sciences, Belles-Lettres etArts.

Marseilles.

p. Faculte des Sciences.

Montpellier. AB. Academie des Sciences et Lettres. B. Faculte de Medecine.

Paris. AB. Academie des Sciences de l'Institut. p. Association Frangaise pour l'Avancement

des Sciences.

p. Bureau des Longitudes. p. Bureau International des Poids et Mesures.

p. Commission des Annales des Ponts et Chaussees.

p. Conservatoire des Arts et Metiers. p. Cosmos (M. L'ABB: VALETTE). AB. Depot de la Marine. AB. ]icole des Mines. AB. Ecole Normale Superieure. AB. fcole Polytechnique. AB. Faculte des Sciences de la Sorbonne. AB. Jardin des Plantes. A. L'Observatoire.

p. Revue Internationale de 1'Electricite.

p. Revue Scientifique (Mons. H. DE VARIGNY).

p. Societe de Biologie. AB. Societe d'Encouragement pour l'Industrie

Nationale. AB. Societ6 de Geographie. p. Societe de Physique. B. Societe Entomologique. AB. Societe Geologique. p. Societe Mathematique. p. Societe Meteorologique de France.

Toulouse. AB. Academie des Sciences. A. Faculte des Sciences.

Germany. Berlin.

A. Deutsche Chemische Gesellschaft. A. Die Sternwarte.

p. Gesellschaft fiir Erdkunde. AB. Konigliche Preussische Akademie der

Wissenschaften. A. Physikalische Gesellschaft.

Bonn. AB. TUniversitiit.

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[ viii 3 Germany (continued).

Bremen. p. Naturwissenschaftlicher Yerein.

Breslau. p. Schlesische Gesellschaft fiir Vaterlandische

Kultur. Brunswick.

p. Verein fur Naturwissenschaft. Carlsruhe. See Karlsruhe. Danzig.

AB. Naturforschende Gesellschaft. Dresden.

p. Verein fur Erdkunde. Emden.

p. Naturforschende Gesellschaft. Erlangen.

AB. Physikalisch-Medicinische Societait. Frankfurt-am-Main.

AB. Senckenbergische Naturforschende Gesell- schaft.

p. Zoologische Gesellschaft. Frankfurt-am-Oder.

p. Naturwissenschaftlicher Verein. Freiburg-im-Breisgau.

AB. Universitat. Giessen.

AB. Grossherzogliche Universitat. Gorlitz.

p. Naturforschende Gesellschaft. Gottingen.

AB. Konigliche Gesellschaft der Wissen- schaften.

Halle. AB. Kaiserliche Leopoldino - Carolinische

Deutsche Akademie der Naturforscher. p. Naturwissenschaftlicher Verein fiir Sach-

sen und Thuringen. Hamburg.

p. Naturhistorisches Museum. AB. Naturwissenschaftlicher Verein.

Heidelberg. p. Naturhistorisch-Medizinische Gesellschaft. AB. Universitat.

Jena. AB. Medicinisch-Naturwissenschaftliche Gesell-

schaft. Karlsruhe.

A. Grossherzogliche Sternwarte. Kiel.

A. Sternwarte.

AB. Universitat.

Kionigsberg. AB. Konigliche Physikalisch - Okonomische

Gesellschaft.

Germany (continued).

Leipsic. p. Annalen der Physik und Chemie. A. Astronomische Gesellschaft. AB. K6nigliche Sachsische Gesellschaft der

Wissenschaften.

Magdeburg. p. Naturwissenschaftlicher Verein.

Marburg. AB. Universitat.

Munich. AB. Konigliche Bayerische Akademie

Wissenschaften.

p. Zeitschrift fur Biologie.

der

Miinster. AB. Konigliche Theologische und Philo-

sophische Akademie. Potsdam.

A. Astrophysikalisches Observatorium. Rostock.

AB. Universitat.

Strasburg. AB. Universitat.

Tiibingen. AB. Universitat.

Wuirzburg. AB. Physikalisch-Medicinische Gesellschaft.

Holland. (See NETHERLANDS.)

Hungary. Pesth.

p. Konigl. Ungarische Geologische Anstalt. AB. _ Magyar Tudos Tarsasag. Die Ungarische

Akademie der Wissenschaften. India.

Bombay. AB. Elphinstone College.

Calcutta. AB. Asiatic Society of Bengal. AB. Geological Museum.

p. Great Trigonometrical Survey of India. AB. Indian Museum.

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.

I

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Ireland (continued). Cork.

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

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

Galway. AB. Queen's College.

Italy.

Bologna. AB. Accademia delle Scienze dell' Istituto.

Florence.

p. Biblioteca Nazionale Centrale. AB. Museo Botanico.

p. Reale Istituto di Studi Superiori. Milan.

AB. Reale Istituto Lombardo di Scienze, Lettere ed Arti.

AB. Societa Italiana di Scienze Naturali.

Naples. p. Societa di Naturalisti. AB. Societa Reale, Accademia delle Scienze. B. Stazione Zoologica (Dr. DOHRN).

Padua. p. University.

Pisa.

p. Societa Toscana di Scienze Naturali.

Rome.

p. Accademia Pontificia de' Nuovi Lincei. A. Osservatorio del Collegio Romano. AB. Reale Accademia dei Lincei,

p. R. Comitato Geologico d' Italia. AB. Societa Italiana delle Scienze.

Siena.

p. Reale Accademia dei Fisiocritici.

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

Venice.

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

ed Arti.

Japan, Tokio.

AB. Imperial University. Yokohama.

p. Asiatic Society of Japan. MDCCCXC.-B.

ix

Java. Batavia,

ABt. Bataviaasch Genootschap van Kunsten en

Wetenschappen. Buitenzorg.

p. Jardin Botanique. Luxembourg.

Luxembourg. p. Societe des Sciences Naturelles.

Malta.

p. Public Library. Mauritius,

p. Royal Society of Arts and Sciences. Netherlands.

Amsterdam. AB. Koninklijke Akademie van Wetenschappen. p. K. Zoologisch Genootschap 'Natura Artis

Magistra.' Delft.

p. :Ecole Polytechnique. Haarlem.

AB. Hollandsche Maatschappij der Weten-

schappen. p. Mus6e Teyler.

Leyden. AB. University..

Rotterdam. AB. Bataafsch Genootschap der Proefonder-

vindelijke Wijsbegeerte. Utrecht.

AB. Provinciaal Genootschap van Kunsten en

Wetelschappen. New Zealand.

Wellington, AB. New Zealand Institute.

Norway. Bergen.

AB. Bergenske Museum. Christiania.

AB. Kongelige Norske Frederiks Universitet. Tromsoe.

p. Museum.

Trondhjenm. AB. Kongelige Norske Videnskabers Selskab.

Nova Scotia. Halifax.

p. Institute of Natural Science. Windsor.

p. King's College Library. Portugal.

Coimbra. AB. Universidade.

Lisbon. AB. Academia Real das Sciencias.

b

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[ x ]

Portugal (continued). Lisbon (continued).

p. Secqao dosTrabalhos Geologicos de Portn gal. Russia.

Dorpat. AB. Universite.

Kazan. AB. Imperatorsky Kazansky Universitet.

Kharkoff.

2p. Section Mledicale de la Societe des Sciences

Experimentales, Universite de Kharlkow Kieff.

1). Societe des Naturalistes. Moscow.

AB. Le Mus6e Public. B. Societe Imperiale des Naturalistes.

Odessa.

p. Societe des Naturalistes de la Nonuvelle-

Russie. Pulkowa.

A. Nikolai Haupt-Sternwarte. St. Petersburg.

AB. Academie Imperiale des Sciences. AB. Comite Geologique. p. Compass Observatory. A. L'Observatoire Physique Central.

Scotland. Aberdeen.

AB. University.

Edinburgh. p. Geological Society. p. Royal College of Physicians (Research

Laboratory). p. Royal Medical Society. A. Royal Observatory. p. Royal Physical Society. p. Royal Scottish Society of Arts AB. Royal Society.

Glasgow. AB. Mitchell Free Library. p. Philosophical Society.

Servia. Belgrade.

p. Academie Royale de Serbie.

Sicily. Acireale.

p. Societa Italiana dei Microscopisti. Catania.

AB. Accademia Gioenia di Scienze Natf,.rali. Palermo.

A. Circolo Matematico. AB. Consiglio di Perfezionamento (Societa di

Scienze Naturali ed Ecnoromiche). A. Reale Osservatorio.

Spain. Cadiz.

A. Observatorio de San Fernando. Madrid.

p. Comisidn del Mapa Geologico de Espania. AB. Real Academia de Ciencias.

Sweden. Gottenburg.

AB. Kongl. Vetenskaps och Vitterhets Sam- halle.

Lund. AB. Universitet.

Stockholm. A. Acta Mathematica. AB. Kongliga Svenska Vetenskaps-Akadenlie. AB. Sveriges Geologiska Undersokning.

Upsala. AB. Universitet.

Switzerland. Basel.

p. Naturforschende Gesellschaft. Bern.

AB. Allg. Schweizerische Gesellschaft.

p. Naturforschende Gesellschaft. Geneva.

A.B. Soci6te de Physique et d'Histoire Naturelle. AB. Institut National Genevois.

Lausanne.

p. Societe Vaudoise des Sciences Naturellcs. Neuchatel.

p. Astronomische Mittheilungen (Professor R.

W'OLF). p. Societe des Sciences Naturelles.

Ziirich. AB. Das Schweizerische Polytechnikum. p. Naturforschende Gesellschaft.

Tasmania. Hobart.

p. Royal Society of Tasmania. United States.

Albany. AB. New York State Library.

Annapolis. AB. Naval Academy.

Baltimore. AB. Johns Hopkins University.

Berkeley. p. University of California.

Boston. AB. American Academy of Sciences. B. Boston Society of Natural History. A. Technological Institute.

Brooklyn. An. Brooklyn Library.

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[ xi ] United States (continued).

Cambridge. AB. Harvard University. B. Museum of Comparative 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.

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

Madison.

p. Wisconsin Academy of Sciences. Mount Hamilton (California).

A. Lick Observatory. New Haven (Conn.).

AB. American Journal of Science. AB. Connecticut Academy of Arts and Sciences.

New York.

p. American Geographical Society. p. American Museum of Natural History. p. New York Academy of Sciences.

p. New York Medical Journal.

p. School of Mines, Columbia College,

United States (continued). Philadelphia.

AB. Academy of Natural Sciences. AB. American Philosophical Society. p. Franklin Institute.

p. Wagner Free Institute of Science. St. Louis.

p. Academy of Science. Salem (Mass.).

p. Essex Institute. AB. Peabody Academy of Science.

San Francisco. AB. California Academy of Sciences.

Washington. p, Department of Agriculture. A. Office of the Chief Signal Officer. AB. Patent Office. AB. Smithsonian Institution. AB. United States Coast Survey. p. United States Commission of Fish and

Fisheries. AB. United States Geological Survey. AB. United States Naval Observatory.

West Point (N,Y.) 4B, United States Military Academy.

1MDCCCXC.- --B. C

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ADJUDICATION of the MEDALS of the ROYAL SOCIETY for the year 1890,

by the PRESIDENT and COUNCIL.

The COPLEY MEDAL to SIMON NEWCOMB, For. Mem.R.S., for his Contributions to the Progress of Gravitational Astronomy.

The RUMFORD MEDAL to HEINRICH HERTZ, for his work in Electro-magnetic Radiation.

A ROYAL MEDAL to DAVID FERRIER, F.R.S., for his Researches on the Localisation of Cerebral Functions.

A ROYAL MEDAL to JOHN HOPKINSON, F.R.S., for his Researches in Magnetism and Electricity.

The DAVY MEDAL to EMIL FIscHER, for his Discoveries in Organic Chemistry, and

especially for his Researches on the Carbo-hydrates.

The DARWIN MEDAL to ALFRED RTUSSEL WALLACE, for his Independent Origination of the Theory of the Origin of Species by Natural Selection.

The Bakerian Lecture, "The Discharge of Electricity through Gases (Preliminary Communication)," was delivered by Professor A. SCHUSTER, F.R.S.

The Croonian Lecture, " On some Relations between Host and Parasite in certain

Epidemic Diseases of Plants," was delivered by Professor H. M. WARD, F.R.S.

c 2

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CONTENTS.

(B.)

VOL. 181.

I. A Chemical Inquiry into the Phenomena of Iltman Respiration. By WILLTAM

MARCET, M.D., F.R.S. ...... .. page 1

II. On Out-lying Nerve-cells in the Mammalian Spinal-Cord. By CH. S. SHER-

RINGTON, M.A., M. B., &c., Fellow of Gonville and Caius College, Cambridge. Communicated by Professor M. FOSTER, Sec. R.S. 33

III, An Experimental Investigation into the Arrangement of the Excitable Fibres of the Internal Capsule of the Bonnet Monkey (Macacus sinicus). By CHARLES

E. BEEVOR, M.D. F.R.C.P., and VICTOR HORSLEY, B.S., F.R.S. (From the

Laboratory of the Brown Institution) ..... 49

IV. On the. Organisation of the Fossil Plants of the Coal-Measares.-Part XVII. By WM. C. WILLIAMSON, LL.D., F.R.S., Professor of Botany in the Owens College, Manchester ....... .. 89

V. The Nitrifying Process and its Specific Ferment.--Part I. By PERCY F. FRANK-

LAND, Ph.D., B.Sc. (Lond.), A.R.S.M., F.I.C., Professor of Chemistry in

University College, Dundee, and GRACE C. FRANKLAND. Communicated by Professor THORPE, F.R . . .. .... ....... 107

VI. A Record of the Restults obtained by Electrical Excitatioin of the so-called Motor Cortex and Internal Capsule in an Orang-Outang (Simia satyrus). By CHARLES E. BEEVOR, M.D., F.R.C.P., and VICTOR HORSLEY, B.S., F.R.S.

(From the Laboratory of the Brown Institution). .129

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xvi ]

VII. Development of the Sympathetic Nervous System in Mammals. By A. M. PATERSON, I .D., Professor of Anatomy in University College, Dundee. Communicated by A. MILNES MARSHALL, F.R.S. ..... page 159

VIII. An Experimental Investigation of the Central lMotor Innervation of the

Larynx. By FELIX SEMON, M.D., F.R.C.P., and VICTOR HORSLEY, B.S., F.R.S. (From the Laboratory of the Brown Instit.ttion) . . 187

Index . . . . . . . . . . . . . .. 213

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LIST OF ILLUSTRATIONS.

Plates 1 and 2.-Dr. W. MARCET on a Chemical Inquiry into the Phenomena of Human Respiration.

Plates 3 and 4.-Mr. C. S. SHERRINGTON on Out-lying Nerve-cells in the Mammalian

Spinal-Cord.

Plates 5 to 11.-Dr. C. E. BEEVOR and Mr. V. IIORSLEY on an Experimental Investi-

gation into the Arrangement of the Excitable Fibres of the Internal Capsule of the Bonnet Monkey (Macacus sinicus).

Plates 12 to 15.-Professor W. C. WILLIAMSON on the Organisation of the Fossil Plants of the Coal-Measures.-Part XVII.

Plates 16 to 21.-Dr. C. E. BEEVOR and Mr. V. HOIsRLEY on a iRecord of the RTesults

obtained by Electrical Excitation of the so-called Motor Cortex and Internal

Capsule in an Orang-Outang (Simina satyrrs).

Plates 22 to 30.-Professor A. M. PATERSON on the Development of the Sympathetic Nervous System in Mammals.

Plates 31 and 32.-Dr. F. SEMON and Mr. V. HORSLEY on an Experimental Investi-

gation of the Central Motor Innervation of the Larynx.

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