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Back MatterSource: Proceedings of the Royal Society of London. Series A, Containing Papers of aMathematical and Physical Character, Vol. 91, No. 633 (Sep. 1, 1915), pp. i-xviiPublished by: The Royal SocietyStable URL: http://www.jstor.org/stable/93587 .

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MINUTES OF MEETINGS.-SESSION 1914-15.

.November 5, 1914.

Sir WILLIAM CROOKES, O.M., D.Sc., President, in the Chair.

The following papers were read :-

I. " On Acquired Radioactivity." By Sir WIILIAM CROOiKES, O.M. P.R.S.

II. "Luminous Vapours distilled from the Arc, with Applications to the Study of Spectrum Series and their Origin.-II." By Hon. R. J. STRUTT, F.R.S.

III. "The Production of Neon and Helium by the Electrical Dis- charge." By Prof. J. N. COLLIE, F.R.S., H. S. PATTERSON, and I. MASSON.

IV. "On the Flow of Viscous Fluids through Smooth Circular Pipes." By Prof. C. H. LEES, F.R.S.

V. "Quantitative Measurements of the Absorption of Light. I.-- The Molecular Extinctions of the Saturated Aliphatic Ketones." By F. O. RICE. Communicated by Prof. E. C. C. BALY, F.R.S.

VI. "The Ignition of Gases by Condenser Discharge Sparks." By Prof. W. M. THORNTON. Communicated by Sir CHARLES PARSONS, F.R.S.

VII. "The Spark Spectrum of Nickel under Moderate Pressures." By E. G. BILHAM. Communicated by Prof. A. FOWLER, F.R.S.

November 12, 1914.

Sir WILLIAM CRlOOKES, O.M., D.Sc., President, in the Chair.

In pursuance of the Statutes, Mr. Dugald Clerk, Prof. A. Liversidge, and Prof. R. Meldola were elected Auditors of the Treasurer's Accounts on the part of the Society.

The following papers were read:-

I. "Analyses of Agricultural Yield. Part I.-The Spacing Experi- ment with Egyptian Cotton, 1912." By W. L. 3BALLS and F. S. HOLTON. Communicated by Dr. F. F. BLACKMAN, F.R.S.

II. "The Fixation of Arsenic by the Brain after Intravenous Injec- tions of Salvarsan." By J. MCINTOSH and P. FILDES. Com- municated by Prof. W. BuIJOCHu, F.R.S.



ii

III. " The Production of Anthocyanins and Anthocyanidins.--- Part II. By A. E. EVEREST. Communicated by Prof. F. KEEBLE, F.R.S.

IV. "Living Observations on the Life-cycle of a New Flagellate--- Helkesimasix fcecicola, together with Remarks on the Question of Syngamy in the Trypanosomes." By H. M. WOODCOCK and G. LAPAGE. Communicated by Prof. S. J. HICKSON, F.R.S.

V. "The Antagonistic Action of Carbon Dioxide and Adrenalin on the Heart." By S. W. PATTERSON. Communicated by Prof. E. H. STARLING, F.R.S.

ANovem.bcr 19, 19114.

Sir WILLIAM CROOKES, O.M., D.Sc., P'resident, in the Chair.

In pursuance of the Statutes, notice of the ensuing Anniversary Meeting was given from the Chair.

The following papers were read:-

I. "Note on the Circulation of the Atmosphere." By A. MALLOCK, F.R.S.

II. "On the Origin of the Indo-Gangetic Trough, commonly called the Himalayan Foredeep." By Col. Sir SIDNEY BURRARD, R.E., C.S.I., F.R.S.

III. "Approximately Permanent Electronic Orbits and the Origin of Spectral Series." By G. W. WALKER, F.R.S.

IV. "Spectroscopic Investigations in Connection with the Active Mpdification of Nitrogen. IV.-A Band Spectrum of Boron Nitride." By W. JEVONS. Communicated by Prof. A, FOWLER, F.R.S.

V. "An Additional Note on the Production of High Permeability in Iron." By Prof. E. WILSON. Communicated by Prof. J. A, FLEMING, F.R.S.

November 26, 1914.


In pursuance of the Statutes, notice of the ensuing Anniversary Meeting was given from the Chair, and the List of Officers and Council nominated for election was read as follows;--



iii

President.-Sir William Crookes, O.M., D.Sc. fTreasurer.--Sir Alfred Bray Kempe, M.A., D.C.L.

Secretaies.( Sir John Rose Bradford, K.C.M.G., M.D., D.Sc. Prof. Arthur Schuster, Sc.D., Ph.D.

Foreign Secretary.-Dukinfield Henry Scott, M.A., Ph.D., LL.D.

Other Members of the Council.-Sir Thomas Clifford Allbutt, K.C.B.; Prof. William Maddock Bayliss, D.Sc.; Frederick Frost Blackman, D.Sc.; Henry John Horstman Fenton, Sc.D.; John Stanley Gardiner, M.A.; Archibald Edward Garrod, F.R.C.P.; William Bate Hardy, M.A.; James Hopwood Jeans, M.A.; George William Lamplugh; Prof. Augustus Edward 'Hough Love, D.Sc.; Prof. Laphael Meldola, D.Sc.; Sir John Thornycroft, LL.D.; Prof. John Sealy Townsend, M.A.; Alfred North Whitehead, Sc.D.; Charles Thomson Rees Wilson, B.Sc.; Arthur Smith Woodward, LL.D.

A Special General Meeting was held to receive the Annual Report of the Council.

November 30, 1914.

ANNIVERSARY MEETING.


The Report of the Auditors of the Treasurer's accounts was read, and the thanks of .the Society were given to the Treasurer and to the Auditors.

The List of Fellows deceased and the List of Fellows elected into the Society since the last Anniversary were read.

The Report to the Society from the Council, upon the work during the past year, was, upon the motion of the President, received.

The President delivered his Anniversary Address. On the motion of Sir Joseph Larmor, seconded by Prof. W. M. Bayliss, the thanks of the Society were given to the President for his Address and he was requested to allow it to be printed.

The Awards of the Medals for the year were announced as follows, and the Medals were presented from the Chair:-

The Copley Medal ........... To Prof. Sir J. J. Thomson. The Rumford Medal........ ,, Lord Rayleigh. A Royal Medal .............,, Prof. E. W. Brown. A Royal Medal .............,, Prof. W. J. Sollas. The Davy Medal ......... ,, Prof. W. J. Pope. The Darwin Medal ..........,, Prof. E. B. Poulton. The Hughes Medal ........., Prof. J. S. Townsend.



iv

The President having, with the consent of the Society, nominated Prof. A. Fowler and Major P. A. MacMahon as Scrutators, to assist the Secretaries in examining the balloting lists for the election of Council and Officers, the votes of the Fellows present were taken. The Scrutators reported that the Council and Officers nominated at the

preceding meeting had been duly elected, and their names were

accordingly announced from the Chair.

The following Fellows were present and voted:-

A. W. Alcock. Major P. A. MacMaholn. C. W. Andrews. T. Mather. W. Barlow. R. Meldola. W. M. Bayliss. . . Messel. F. E. Beddard. E. A. Minchin. R. H. Biffen. A. Muirhead. W. A. Bone. E. . TNewton. D. L. Chapman. Sir A. Pedler. Sir W. Christie. J. Perry. Sir W. Crookes. H. G. Plimnmer. F. W. Dyson. I. 1. Pocock. Sir D. Ferrier. W. J. Pope. L. Fletcher. BE.. Poulton. A. Fowler. G. TPrior. F. W. Gamble. Lord Rayleigh. A. E. Garrod. A. B. Rendle. E. J. Garwood. A. Schuster. Sir A. Geikie. A. Scott. F. D. Godmani. S. W. J. Smith. W. Gowland. E. H. Starling. A. Hardein. A. Strachan. J. A. Harker. J. J, H. Teall. J. T. Hewitt. Sir W. Tilden. A. R. Hinks. S. P. Thompson. J. H. Jeans. Sir J. J. Thomson. G. W. Lamplugh. H. H. Turner. Sir J. Larmor. W. C. Unwin. C. H. Lees. H. W. T. Wager. T. M. Lowry. A. D. Waller.

Capt. H. G. Lyons. W. W. Watts. A. Keith. A. . Whitehead. Sir A. Kempe. C. T. I. Wilson. E. W. MacBride. Sir J. Wolfe-Barry. H. McLeod. A. S. Woodward.

The thanks of the Society were given to the Scrutators.



Decembegr 3, 1914.


The Duke of Devonshire was admitted into the Society. The following Papers were read:-

I. "On the Thermophone-a New Form of Telephone." By M. P. DE LANGE. Communicated by LORD RAYLEIGH, O.M., F.R.S,

II. " Hermann' Phenomenon." By G. S. WALPOLE. Communicated by Prof. F. G. DONNAN, F,R.S.

December 10, 1914.


The Presideint announced that he had appointed as Vice-Presi- dents:-

Sir A. B. Kempe (Treasurer). Sir T. C. Allbutt. Mr. W. B. Hardy. Prof. R. Meldola.

The following Papers were read:-

I. "The Measurement of Arterial Pressure in Man. I.-The Auditory Method. II.--A Schematic Investigation." By M. FLACK, Prof. L. HILL, F.R.S., and J. McQUEEN.

II. "The Electrical Conductivity of Echinoderm Eggs, and its Bearing on the Problems of Fertilisation and Artificial Partheno- genesis." By J. GRAY. Communicated by Prof. J. S. GARDINER, F.R.S.

III. "The Endemic Flora of Ceylon with reference to Geographical Distribution and Evolution in General." By J. C. WILLIS, Sc.D. Communicated by Dr. D. H. SCOTT, For. Sec. R.S.

The Society adjourned over the Christmas Recess to Thursday, January 21, 1915.



vi

January 21, 1915.


In pursuance of the Statutes, the names of Candidates for election into the Society were read as follows:-

Andrewes, Frederick William. Appleyard, Rollo. Arber, Edward Alexander Newell. Armstrong, Edward Frankland. Ashworth, James Hartley. Bainbridge, Francis Arthur. Bairstow, Leonard. Barton, Edwin Henry. Bedson, Peter Phillips. Bolton, Charles. Bose, Jagadis Chunder. Bousfield, William Robert. Broom, Robert. Brown, Sidney George. Bryce, Thomas Hastie. Buckmaster, George Alfred. Budge, Ernest A. Wallis. Carpenter, Henry Cort Harold. Carslaw, Horatio Scott. Coker, Ernest George. Conway, Arthur William. Conyngham, Gerald Ponsonby

Lenox. Dakin, Henry Drysdale. Davidson, Sir James Mackenzie. Dawson, Charles. Dixon, Augustus Edward. Dobell, Cecil Clifford. Doncaster, Leonard. Duckworth, Wynfrid Laurence

Henry. Edkins, John Sydney. Evershed, John. Ewart, Alfred James. Fletcher, Walter Morley. Forbes, Henry Ogg. Fowler, George Herbert. Gardner, John Addyman. Gray, Albert Alexander.

Green, Arthur George. Groom, Percy. Guppy, Henry Brougharm. Halm, Jacob Karl Ernst. Harmer, Frederic William. Hartog, Marcus. Hayden, Henry Hubert. Henderson, George Gerald. Henry, Augustine. Hewlett, Richard Tanner. Horrocks, William Heaton. Houston, Alexander Cruikshank. Hoyle, William Evans. Hutchinson, Arthur. Jenkinson, John Wilfrid. Jordan, Karl. Kennedy, Robert. Kitchin, Finlay Lorimer. Lake, Philip. Laurie, Arthur Pillans. Lewes, Vivian B. Lewis, Thomas. Locke, Frank Spiller. Macdonald, John Smythe. McFadyean, Sir John. McKenzie, Alexander. Mackenzie, James. McLennan, John Cunningham. MacWilliam, John Alexander. Maiden, Joseph Henry. Marshall, Francis Hugh Adam. Masterman, Arthur Thomas. Matthews, Sir Thomas. Maw, William Henry. Morgan, Gilbert Thomas. Murphy, Sir Shirley Forster. Myers, Charles Samuel. Newsholme, Arthur. Nicholson, John William.



vii 4rl

Ogilvie-Grant, William Robert. Orton, Kennedy Joseph Previte. Parsons, Hon. Richard Clere. Pearson, Henry Harold Welch. Peddie, William. Pembrey, Marcus Seymour. Perkins, Robert Cyril Layton. Pickard, Robert Howson. Pollock, James Arthur. Purey-Cust, Herbert Edward. Ray, Prafulla Chandra. Read, Sir Charles Hercules. Redwood, Sir Boverton. Reed, Frederick Richard Cowper. Reynolds, Sidney Hugh. Rogers, Sir Leonard. Rose, Sir Thomas Kirke. Rosenheim, Otto. Russell, Alexander. Seligmann, Charles Gabriel. Shattock, Samuel George. Shearer, Cresswell.

Sidgwick, Nevil Vincent. Simpson, George Clarke. Smiles, Samuel. Smith, Frank Edward. Smith, Geoffrey Watkin. Steele, Bertram Dillon. Stephens, John William Watson. Swinton, Alan Archibald Campbell. Tansley, Arthur George. Vaughan, Arthur. Vaughan, David T. Gwynne. Walker, Ernest William Ainley. Walker, James. Warren, William Henry. Weizmann, Charles. Wheeler, Richard Vernon. Whytlaw-Gray, Robert. Willis, John Christopher. Wilson, Ernest. Woods, Henry. Yarrow, Alfred Fernandez.


I. " Atmospheric Electricity Potential Gradient at Kew Observatory, 1898--1912." By Dr. C. CHREE, FR.S.

II. "The Transmission of Electric Waves over the Surface of the Earth." By Prof. A. E. H. LOVE, F.R.S.

III. "Electromagnetic Waves in a Perfectly Conducting Tube." By L. SILBERSTEIN. Communicated by Prof. A. W. PORTER, F.R.S.

IV. "An Electrically Heated Full Radiator." By H. B. KEENE. Communicated by Sir O. LODGE, F.R.S.

Jansua;ry 28, 1915.


The following Papers were read :-

I. "The Influence of Salt-concentration on Heemolysis." By W. W. C. TOPLEY. Communicated by Prof. F. W. MOTT, F.R.S.



viii

II. "The Life-cycle of Cladocera, with Remarks on the Physiology of Growth and Reproduction in Crustacea." By G. SMITT. Communicated by E. S. GOODRICH, F.R.S.

III. "Investigations on Protozoa in Relation to the Factor limiting Bacterial Activity in Soil." By T. GOODreY. Communicated by Prof. F. W. GAMBLE, F.R.S.

IV. "On the Mesodermic Origin and the Fate of the so-called Mesectoderm in Petromyzon." By S.. HATTA. Communi- cated by Prof. E. W. MAcBRIDE, F.R.S.

V. "The Influence of Homodromous and Heterodromous Electric Currents on Transmission of Excitation in Plant and Animal." By Prof. J. C. BOSE. Communicated by Prof. S. H. VINES, F.R.S.



ix

February 4, 1915.



I. "Discontinuous Fluid Motion past a Bent Plane, with Special Reference to Aeroplane Problems." By Prof. G. H. BRYAN, F.R.S., and R. JONES.

II. "A New Type of Series in the Band Spectrum associated with Helium." By Prof. A. FOWLER, F.R.S.

[II. "On the Spectra of Ordinary Lead and Lead of Radioactive Origin." By T. R. MERTON. Communicated by Prof. A. FOWLER, F.R.S.

IV. " On the Viscosity of the Vapour of Iodine." By A. O. RANKINE. Communicated by Prof. A. W. PORTER, F.R.S.

February 11, 1915.



I. "c Lepidostrobus Kentuckiensis, formerly Lepidostrobus Fiseheri, Scott and Jeffrey.--A Correction." By Dr. D. H. SCOTT, For. Sec. R.S.

II. "The Excitatory Process in the Dog's Heart. Part II.-The Ventricles." By T. LEWIS and M. A. ROTHSCHILD. Com- mrunicated by Prof. E. H. STARLING, F.R.S.

III. "On the Variation in the Growth of Mammalian Tissue in vitro according to the Age of the Animal." By A. J. WALTON. Communicated by Prof. W. BULLOCH, F.R.S.

February 18, 1915.



I. "Gaseous Combustion at High Pressures." By Prof. W. A. BONE, F.R.S., and others.

II. "The Orbits of a Charged Particle round an Electric and Magnetic Nucleus." By Prof. W. M. HICKS, F.R.S.



x

III. "The Lunar Diurnal Magnetic Variation and its Change with Lunar Distance." By S. CHAPMAN. Communicated by Sir F. W. DYSON, F.R.S.

IV. "Some Temperature Refraction Coefficients of Optical Glass." By Lt.-Col. J. W. GIFFORD. Communicated by Prof. S. P. THOMPSON, F.R.S.

February 25, 1915.


The following Papers were read :

I. "The Effect of the Depth of Pulmonary Ventilation on the Oxygen in the Venous Blood of Man." By Prof. L. HILL, F.R.S., and J. F. TWORT.

II. "The Effect of Functional Activity upon the Metabolism, Blood Flow and Exudation in Organs." By J. BARCROFT, F.R.S., and TOYOJIRO KATO.

III. "The Osmotic Balance of Skeletal Muscle." By Miss D. JORDAN LLOYD. Communicated by W. B. HARDY, F.R.S.

IV. "On the Function of Chlorophyll." By A. J. EWART, D.Sc. Communicated by Prof. A. C. SEWARD, F.R.S.

V. " The Influence of the Hydrogen Concentration upon the Optimum Temperature of a Ferment." By A. COMPTON. Com- municated by Prof. W. BULLOCH, F.R.S.

VI. "Functional (Edema in Frog's Muscle." By M. BACK, K. M. COGAN, and A. E. TOWERS. Communicated by J. BARCROFT, F.R.S.

March 4, 1915.


In pursuance of the Statutes, the names of the Candidates recom- mended for election into the Society were read as follows:-

Andrewes, Frederick William. McLennan, John Cunningham. Conway, Arthur William. Masterman, Arthur Thomas. Doncaster, Leonard. Morgan, Gilbert Thomas. Evershed, John. Myers, Charles Samuel. Fletcher, Walter Morley. Simpson, George Clarke. Green, Arthur George. Swinton, Alan Archibald Campbell. Hayden, Henry Hubert. Tansley, Arthur George. Mackenzie, James.



xi

The following Papers were read:

I. "A Bolometric Method of Determining the Efficiency of Radiating Bodies." By Prof. W. A. BONE, F.R.S., Prof. . L. CALLENDAR, F.R.S., and H. J. YATES.

II. "The Simplification of the Arithmetical Processes of Involution and Evolution." By E. CHAPPELL. Communicated by Prof. W. E. DALBY, F.R.S.

III. "The Elastic Properties of Steel at Moderately High Tempera- tures." By F. E. ROWETT. Communicated by Prof. B. HOPKINSON, F.R.S.

IV. "The Laws of Series Spectra." By Prof. J. W. NICHOLSON. Communicated by Prof. A. FOWLER, F.R.S.

March 11, 1915.

Sir WILLIAM CROOKES, O.M., D.Sc., President, followed by Mr. W. B. HARDY, Vice-President, in the Chair.


I. " Contributions to the Study of the Bionomics and Reproductive Processes of the Foraminifera." By E. HERON-ALLEN. Communicated by Prof. W. A. HERDMAN, F.R.S.

II. "On the Occurrence of an Intracranial Ganglion upon the Oculo- motor Nerve in ScyIlium canicutla, with a Suggestion as to its Bearing upon the Question of the Segmental Value of Certain of the Cranial Nerves." By G. E. NICHOLLS. Communi- cated by Prof. A. DENDY, F.R.S.

III". Experiments on the Restoration of Paralysed Muscles by Means of Nerve Anastomosis. Part III.-Anastomosis of the Brachial Plexus, with a Consideration of the Distribution of its Roots." By Prof. R. KENNEDY. Communicated by Prof. J. G. MCKENDRICK, F.R.S.

IV. " On the Mechanism of the Cardiac Valves.-A Preliminary Com- munication." By A. F. S. KENT. Communicated by Prof. C. S. SHERRINGTON, F.R.S.

March 18, 1915.


The Bakerian Lecture was delivered by Prof. W. H. BRAGG, F.R.S., on " X-rays and Crystals."



xii

March 25, 1915.



I. "The Production of Growths or Deposits in Metastable Inorganic Hydrosols." By Prof. B. MOORE, F.R.S.

II. "On Forms of Growth resembling Living Organisms and their Products slowly deposited from Metastable Solutions of In- organic Colloids." By Prof. B. MOORE, F.R.S., and W. G. EVANS.

III. "A Contribution to our Knowledge of the Chemistry of Coat- colour in Animals and of Dominant and Recessive Whiteness." By the Hon. H. ONSLOW. Communicated by Dr. F. G. HOPKINS, F.R.S.



xiii

April 22, 1915.



I. " Deep Water Waves, Progressive or Stationary, to the Third Order of Approximation." By Lord RAYLEIGH, O.M., F.R.S.

II. "A Chemically Active Modification of Nitrogen, produced by the Electric Discharge.-VI." By the Hon. R. J. STRUTT, F.R.S.

III. "The Difference between the Magnetic Diurnal Variations on Ordinary and Quiet Days at Kew Observatory." By Dr. C. CHREE, F.R.S.

IV. "The Effects of Different Gases on the Electron Emission from Glowing Solids." By F. HORTON. Communicated by Sir J. J. THOMSON, F.R.S.

V. "Heats of Dilution of Concentrated Solutions." By W. S. TUCKER. Communicated by Prof. H. L. CALLENDAR, F.R.S.

VI. "On the Origin of the '4686' Series." By T. R. MERTON. Com- municated by Prof. A. FOWLER, F.R.P

pril 29, 1915.



I. " The Transmission of Infra-red Rays by the Media of the Eye, the Transmission of Radiant Energy by Crookes and other Glasses." By H. HARTRIDGE and A. V. HILL. Com- municated by W. B. HARDY, F.R.S.

II. "Surface Tension and Ferment Action." By E. BEARD and W. CRAMER. Communicated by Sir E. SOHiFER, F.R.S.

III. "Surface Tension as a Factor controlling Cell Metabolism." By W. CR(AMER. Communicated by Sir E. SCHiAFER, F.R.S.



xiv

May 6, 1915.

Sir ALFRED KEMPE, Vice-President and Treasurer, in the Chair.


I. "Some Problems Illustrating the Forms of Nebulse." By G. W. WALKER, F.R.S.

II. "Observations on the Resonance Radiation of Sodium Vapour." By the Hon. R. J, STRUTT, F.R.S.

III. "Local Differences of Pressure near an Obstacle in Oscillating Water." By HERTHA AYRTON. Communicated by Lord

RAYLEIGH, O.M., F.R.S.

May 13, 1915.

Annual Meeting for the Election of Fellows.


The Statutes relating to the Election of Fellows having been read, Mr. W. Barlow and Prof. H. F. Newall were, with the consent of the Society, nominated Scrutators, to assist the Secretaries in the examina- tion of the balloting lists.

The votes of the Fellows present were collected, and the following Candidates were declared duly elected into the Society :-

Andrewes, Frederick William. M\cLennan, John Cunningham. Conway, Arthur 'William. MAastermlan, Arthur Thomas. Doncaster, Leonard. Morgan, Gilbert Thomas. Evershed, John. Myers, Charles Samuel. Fletcher, Walter Morley. Simpson, George Clarke. Green, Arthur George. Swinton, Alan Archibald Campbell. Hayden, Henry Hubert. Tansley, Arthur George. Mackenzie, James.

Ma,y 1 3, 1915.


M. H. L. Le Chatelier, Foreign Member (elected 1913), was admitted into the Society.


I. "The Development of the Thymus, Epithelial Bodies, and Thyroid in the Vulpine Phalanger (Trichosurns vulpecula)." By ELIZABETH A. FRASER and Prof. J. P. HILL, F.R.S.



XV

II. "Some Observations on the Development of the Thymus, Epithelial Bodies, and Thyroid in Phascolarctos, Phascolomys, and Perameles." By ELIZABETH A. FRASER. Communicated

by Prof. J. P. HILL, F.R.S.

III. "Measurement of the Specific Heat of Steam at Atmospheric Pressure and 104 5? C." By J. H. BRINKWORTH. Com- municated by Prof. H. L. CALLENDAR, F.R.S.

IV. "Thermal Properties of Carbonic Acid at Low Temperatures.- II." By C. F. JENKIN and D. R. PYE. Communicated by Sir A. EWING, F.R.S.

May 20, 1915.


Prof. F. W. Andrewes, Mr. L. Doncaster, Dr. W. M. Fletcher, Dr. James Mackenzie, and Mr. A. G. Tansley were admitted into the Society.


I. "On the Corpuscular Radiation Liberated in Vapours by Homo- geneous X-radiation." By H. MOORE. Communicated by Prof. O. W. RICHARDSON, F.R.S.

II. "The Absorption in Lead of y-Rays emitted by Radium B and Radium C." By H. RICHARDSON. Communicated by Sir E.

RUTHERFORD, F.R.S.

III. "On the Application of Interference Methods to the Study of the Origin of Certain Spectrum Lines." By T. R. MERTON. Communicated by Prof. A. FOWLER, F.R.S.

The Society adjourned over the Whitsun Recess to Thursday, June 3.



xvi

June 3, 1915.


Prof. G. T. Morgan and Mr. Campbell Swinton were admitted into the Society.

The following Papers were read :-

I. "On the Shapes of the Equipotential Surfaces in the Air near Long Walls or Buildings and on their Effect on the Measure- ment of Atmospheric Potential Gradients." By Prof. C. H. LEES, F.R.S.

II. "The Influence of Gases on the Emission of Electrons and Ions from Hot Metals." By Prof. O. W. PICHARDSON, F.R.S.

III. "The Band Spectrum associated with Helium." By J. W. NICHOLSON. Communicated by Prof. A. FOWLER, F.R.S.

IV. "The Chromosome Cycle in Coccidia and Gregarines." By C. DOBELL and A. P. JAMESON. Communicated by Prof. J. B. FARnMER, F.R.S.

The Society adjourned to June 17.

h?June 17, 1915.


Prof. A. W. Conway, Prof. A. G. Green, and Dr. A. T. Masterman were admitted into the Society.


I. "Soil Protozoa and Soil Bacteria." By E. J. RUSSELL. Com- municated by H. T. BROWN, F.R.S.

II. "On the Enhanced Series of Lines in Spectra of the Alkaline Earths." By Prof. W. M. HICKS, F.R.S.

III. "On Certain Linear Differential Equations of Astronomical Interest." By Prof. H. F. BAKER, F.R.S.

IV. "On the Partial Correlation-Ratio." By Prof. KARL PEARSON, F. I.S.



xvii

V. "The Effect of Temperature on the Hissing of Water when

Flowing through a Constricted Tube." By S. SKINNER and F. ENTWISTLE. Communicated by Sir NAPIER SHTAW, F.R.S.

VI. " onisation Potentials of Mercury, Cadmium, and Zinc, and the

Single and Many-lined Spectra of these Elements." By J. C. MCLENNAN, F.R.S., and J. P. HENDERSON.

VII. "The Monoclinic Sulphates containing Ammonium.-Completion of the Double Sulphate Series." By A. E. H. TUTTON, F.R.S.

VIII. "General Equations for the Neutralisation of Dibasic Acids, and their Use to Calculate the Acidity of Dilute Carbonate Solutions." By E. B. R. PRIDEaAUX. Communicated by Prof. F. G. DONNAN, F.R.S.

IX. "The Electrical Conductivity and Luminosity of Flames con-

taining Salt Vapours." By Prof. H. A. WILSON, F.R.S.

X. On a Spectrum associated with Carbon in Relation to the Wolf-Rayet Stars." By T. R. MERTON. Communicated by Prof. A. FOWLER, F.R.S.

XI. "'The Threshold of Vision for Different Coloured Lights." By Sir WM. ABNEY, F.R.S., and Prof. W. WATSON, F.R.S.

XII. "Hydrodynamical Problems suggested by Pitot's Tubes." By LORD RAYLEIGH, O.M., F.R.S.

XIII. "Electrical Effects accompanying the Decomposition of Organic Compounds. II.-Ionisation of the Gases produced during Fermentation." By M. C. POTTER. Communicated by Dr. A. D. WALLER, F.R.S.

XIV. "The Inheritance of Colour in the Stick-Insect (Caarausi,.s morosms)." By Prof. E. W. MACBRIDE, F.R.S., and A. JACKSON.

XV. " On the Relation between Transpiration and Stomatal

Aperture." By Sir FRANCIS DARWIN, F.R.S.

XVI. " The Monotreme Skull-a Contribution to Mammalian Morpho- genesis." By D . S. W. ATSON. Communicated by Prof. J. P. HILL, F.R.S.

The Society adjourned over the Long Vacation to Thulrsday, November 4.



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