Back Matter

Back MatterSource: Proceedings of the Royal Society of London. Series A, Containing Papers of aMathematical and Physical Character, Vol. 94, No. 664 (Aug. 1, 1918), pp. i-xvPublished by: The Royal SocietyStable URL: http://www.jstor.org/stable/93622 .

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MINUTES OF MEETINGS.-SESSION 1917-18.

NYovember 1, 191.7.

Sil J. J. THOMSON, O.M., President, in the Chair.

The following Papers we-re read:

1. " On the Reflectiotl of Light from a Regularly Stratified Medilum." f13y LoRuD RAYLEIGH, O.M., F.R.S.

II. "Two Cases of Congienital Niglt-Blindness." By Sir WILLIAM ABNEY, K.C.B., F.R.S.

1I1. "Duration of Luminosity of Electric Discharge in GCases and VTapours.-Fuirther Studies." By the HEon. R. J. STRUTT, P.1R.I.

IV. "Surface Reflection. of Earthquake Waves." By G. W. WALKER,. F.R.IS.

V. "Characteristic Frequeincy and Atomic Number." By H. S. ALLEN, D.Se. Commulnicated by Prof. 0. W. RICHARDSON, F.R.S.

vI. "Historical Note oni a Relationi between the Gtavitabional Attraction Exercised and the Elastic Depressioni Caused by Load on the Plane Surface of an Isotropic Elastic Solid." By C. CH-REtil, F.R.S.

lNovembe1r)c 8, -1917.

Sir J. J. THOMSON, O.M., Presidenlt, in the Chair.

In pursuance of the Statutes, Prof. W. E. Dalby, Sir IMostyn Field, and Mr. R. D. Oldham were elected Auditors of the Treasurer's Accounts on the part of the Society.

The following Papers were read:

I. "The Galvanometric Measuremeint of ' Emotional' Phy siological Chian1ges." By Prof. A. D. WALLER, F.R.S.

II. "'T1he Structure, Evolution, and Origin of the Amphilbia. Part I.-The 'Orders' Rachitomit and Stereospond yii." By D. A. S. WATSON. Communicated by Prof. J. P. liiiH,, FRI'' S.



IN l The E zynies concerned in the Decomposition of Glucose and Mannitol by &ac ths colis consmo.s. Part II1:-Experimeuts of Short -Duration with- an - Emnlion f tof -the Organisms. Part 1IT.-Various Phases in the -Decomposition of Glucose by an EmulB ion of, the Organ.ism.s.` ByN p,B. C. (1REY. Com- muniicated by DIX4. A. HARDEJT, F.:R.S.

Sir J. 4. THC)MSOI , O.M, iPresieitl in the Char

I:n. pursuane* of the Statuteos, notice- of t-he ensting Anniversary 'Iccting was givern fron the Chair.

YPhe following Papers were read:

I. '1 On -a New Gyiroseopic Penomnenllon.' ByI &l . 0Tou RNAY RUHINE. Conamuci ated by Psof. . 7CAu`I 'ThE, SM. .S. (Prof. A. G-h iAY FP exhibited the cxoperil;nnt)

N1. IVtnvetgation iuto 0In, in ibibition e exhibit-d b3y, some Shellae Der vatives." Bv A. P. LTAPUE 11d (C -rNEiN. Coin- muncated by Prof. J. WALKER,3R F.R.

ITTL "Phenom ena Conneceted wibth Turbulen'ice in t:he Lowver Atmo- sphere." By > . L. T'AYLOR. ConmunicaIted by Sir NAPITE SHITAw, F.P.S.

1V. On the Relation. beetwee-t Barnometric Pressi re and the Water Leveli in a WVll at Kew Observatory." By E. G. tBILTIAM. Conmrnnni6at ed by Sir NAPIEl, SAwA, F.R.S.

Nev0 v -tn, b 22; 1917.

Sir J. J. THOMISON, 0M., President, in the-Chair.

A Special General. Meeting ofAthe Society was held to reecive the Annual Report of the Council.



iii

Yor le'beQ 22, 1 917.

Sir J. J. THOM'[SON, O.-, President, ini the Chair.

In.4 pursuance of the Statutes, niotice of tihe ensuing Anniversary Meeting was giveni from the Chair, anfld thle list of Offic0seer, ancl Council nominaite fo election was rea d as follows:

Piesident.-Sir Joseph John Thomsoin, O.M., D.A., I).Sc., LL.).

[lieaszo ee.----Si k Alfred Briay Kempe, M.IA., (D.LC.

Sere7taies. f of. Arthur Schlnster, Sc.D., Ph.D. W \0Tilliamnl ]Bate 'Hardy, MT.A.

Foreign Secrelar y-PrI-of. 'William A.bbott H-IerdmcTaln, a D.Sc.

Othe'lle nr 1 rbes f 1the ('ontremi.--Hugh Ker,r Yinderson, MK.D. ; Sir Geor1>ge3 Thorn1as Tleilby -11rof. Gilbert Chbarles IBourne, ).Sc. ; Prof. Arthur ltoboirtsot Cu shyiy, MXI.D.; MAtartin Onslovw -liForster, D.Sc.; Prof. Percy Fartdry 1 rinklanrII, LL.D. ; Jam1ers Whitbreacd Lee Glaisher, Sc.D. Prof. Pei tralllm Hopkinson, M.Inst.C.E.; James Hopwood JeaiS; J rof. rtWilliamll H-e-Iniry Lang, D.Sc.; Major Henry C-eorge Lyons; Willian-i m falsE Rivers PLivers, TR.D; Prof. Charles Scott Sherrinigto-lS M I.D.; Prof. tthe lion. iltobert JohTn Strutt, MNLA. James Swinburne, M.ftC.E.; Prof. Willilam Whiteheaci Watts, LL.D).

The following Papers wereom read:--

1. " -Bactericidal Propertie-'s Conaferred on tlhe, B13lood by Intiravenlollns Injectio is of Diamino-acridine Sulphate." By C. H. 1BRowNN`G anld I . CULL-RA.NSEN. Communicated byr Prof. 1R. Mlumt F.R.S.

HI. " The Pelmatoporinar : Aiu E ssay on t;he Evolutioni of a Groulp of Cretaceous Polyzoa." By W. D. LANG. Commulnicated by Dr. F. A. BArmIER, F.Rt.S.



lv

l\OVbewer :302, 1917.

ANNIVERSARY ME1E1TING.

Sir J. J. THOMSON, O.M., President, in the Chair.

The Report of the Auiditors of the Treasurer's acconiits was read, anld the thanks of the Soeiety were given to the 'rreasurer andl to thie 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 (luring the past year, was, uponl the nmotion of the President, received.

The Presidentt delivered his Aniniversary Addrcess. On tjhe miotion] of Sir R. Glazebrook, seconded by Sir A. Evanis, the thauilis of the Society were voted to the President for his Address, and hie was requested to allow it to be printed.

The Awards of the Medals for the year were alnnounced as follows, and the Mledals were presenited fronm the Chair:-

The Copley Medal ............ To Prof. Emile Itoux. A Royal Medal ............... ,, Dr. John Aitken. A Royal Aledal ............... ,, Dr. A. Smith Woodward. The Davy Medal - .......... Prof. Albin Haller. The Buchanani Medal ...... Sir Ali-nroth Wright. The Hughes Medal ........ ,, Prof. C. (x. Barkla.

The Presidcent having, with the consent-of the Society, nominated Prof. J. B. Farmer and Prof. J. C. MeLennan as Serutators to examine tlhe balloting lists for the election of Ceuxncil and Officers, the votes of tie FEellows presenit were taken.

The Scrutators reported that the Council anid Officers nlominated at the preceding, meetinig had been duly elected.

The thanks of the Society were given to the Scrutators.



V

_Decemn,ber 6, 1917.

Sir J. J. TH-IOMSON, O.M., President, in the Chair.

The President anniounced that he had appointed the following Vice-Presideents :

Sir Alfred Keimpe (Treasur er). Prof. P. F. Franklanld. Dr. J. W. L. Glaisher. P'rof. C. S. sherrin gtoul.

'The followingg Papers were read

1. "On the Series of Legendre." B3y Pr-of. WT. H. YouNm4, FELS.5.

1H. " The Diiscb-arge of Gases nu:des- I1igbi 'Pressui-es." By 1L. HABETSHORN. Communicated by the HoTn. R1. o. STr'UTiT

}1. R" S.

::[1. "ilternal LBallistie;S." By Lieut.--Col. A. G. HimcocK. Corn- municateci by Sir G EORGE G!R EENHILL, F.R. S.

IV. " The Electrostatic Problem of a Conductinig Sphere in a. Spherical Cavity." 3y Ai NANDER RUSISELL, D).Sc. Commniunicated by Dr. C. CHREE, F.R.S.

V. 1"The Zeros of Bessel Funetions." By Prof. U. N. WATSONN. Coommunicated by 1'rof. J. WV. NICIHoLsoN, FELS.

Decembe,r 13'D, 19917.

Sir J. J. THOMSON, O.iM., President, in tbe Chair.

The following Papers were read

I. "Trhe Formation of Nitrites from Nitrates in Aqueous Solution by the Action of Sunlight andI the Assimilation of the Nitrites by Green Leaves inu S-unlight." B3y iProf. B. AO0ORE, F.R.S.

Il. " The ,lTransitions froil Rostrocarinate Flirnt Implements to the Tongjue-sbaped Implemients of River--terrace C ravels." By J. R. Mow,[(- CoI mrnnnicated by Sir IRAY LANKESTER, K.C.B., F.R1.S.

Trhe Society adjourned over the Christmas Recess to '1'hursday, Janiuary 24, l98.



vi.

Jatnuary 24, 1918.


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

Abell, Westcott Stile. A2kgar, Wilfred Eade. Andersoni, Alexander. Annandale, Nelson. Appleyard, Rollo. Bainbridge, Fraincis Arthur. Barger, George. Berry, Arthulr. Bolton, Charles. Borradaile, Lancelot Alexander. Bose, Sir Jagadis Chunder. Bryce, Thomas Hastie. Buckmaster, George Alfred. Burnside, William Snow. Calnmani, Willianm Thomas. Campbell, Albert. Carpenter, Charles. Carpenter, HEenry Cort Harold. Cathcart, Edward Provan. Chapmian, Alfred Chastoil. Chapman, Thomas Algerioii. Close, Sir Charles Frederick. Cole, Frank Joseph. Conyngham, Gerald Ponsoniby

Lennox. Davidsoni, Sir James Mackenizie. Dobell, Cecil Clifford. Dreyer, Georges. Duckworth, Wynfrid Lauirence

Henry. Eccles, William Henry. Edridge-Green, Frederick William. Farmer, Robert Crosbie. Forbes, Henry Hogg. Gardner, John Addymayi. Gemmell, James Fairlie. Gold, Ernest. Graham-Smith, George Stuart. Greenwood, Major. Gregory, Reginald Philip. Guppy, Henry Brougham.

Hadeock, Albert G-eorge. Hendersoni, James B. Henry, Augustinie. Heron-Allen, Edward. Hewlett, Richard Tanner. Hill, Archibald Vivian. Hill, Arthuir William. Ihiltoii, Harold. Horrocks, William Heatont. Hoyle, William Evans. Huime, W\illiam Frazer. Hutchinson, Arthur. Irvinie, Jamnes Colquhouii. Jackson, Louis Charles. Kitchiin, Finlay Lorinmer. Laurie, Arthur Pillans. Lawson, A bercrombie Anstruther. Leathem, John Gaston. Lefroy, Harold Miaxwell. Lewis, Thomas. Locke, Frank Spiller. MAarshall, Franicis Hugh Aclam. Matthew, William Diller. Maw, William H:enry. Mellor, Joseph William. Mertonl, Thomas Ralph. Mill, Hugh Robert. Aloss, Charles Edward. Mummery, John Howarrd. Ogilvie-Grant, William Robert.. Orton, Kennedy Joseph Previte. Parsonis, Hon. Richard Clere. Perkinis, Robert Cyril Layton. Philip, James Charles. Plunmmer, Heinry Crozier. Rvamanujan, Srinivasa. Ray, Prafulla Chandra. Redwood, Sir Bovertoni. Reed, Frederick Richard Cowper. Ritchie, James. Rogers, Arthur William.



vi i

Rose, Sir Thomas Kirke. Russell, Alexander. Seligman, Charles Gabriel. Senier, Alfrted. Shaw, Philip Egerton. Sidgwick, Nevil Vincent. Skeats, Ernest Willington. Smiles, Samuel. Smith, AMajor-Genieral F'rederick. Smith, Franik Edward. Spencer, Leonard James. Steele, Bertrain Dillon.

Stephenls, John William Watsoi Thornton, Williamn Miundell. Vernoni, Horace Middleton. Vickers, Albert. Watson, David Meredith S. Watson, George Neville. Wheeler, Richard Vernon. Whytlaw-Gray, Robert. Willcox, William Henry. Willis, John Christopher. Wilsoni, Erniest. 'Wood, Thomas Barlowv.

The following Papers were read : I. "Graphical Solution for hI;gigh-angle 'Fire." By Prof. A. N.

WHITEIIEAD, F. R. S.

II. "On Floccullation." By SPENCEC PICKERING, F.R.S.

III. "Revolving, Fluid in the Atmosphere." By Dr. J. AITREN, F.R.S.

IV. " Ultra-violet Transparency of the 1Lower Atmosphere and its Relative Poverty in Ozone." -By the Honi. R. J. STRUTT, F.R.S.

V. "Trhe Presence in the Solar Spectrum of the Water-vapour Band X 3064." 13y Prof. A. F'OWLER, F.R.S.

VjI. " The Ultra-violet Ba.nd of Amimonia aind its Oceurrence in the Solar Spectrum." By Prof. A. FowLERn, F.R.S., and C. C. L. GREGORY.

e;fam'aar(GIy 3:1, 191l8. Sir J. J. THOMAISON, O.M., Presidernt, followed by Sir DAVID

BRUCE, in the Chlair.

The following Papers were read:- I. "Growth of Trrees, with a Note on Interferencer Bands formed by

Rays at Small Angles." By A.. MALLOCK, F.R.S.

II. "Actioni of Light Rays ont Organic Comnpounds and the Photo- synthesis of Organic fromn Inorganiic Compounds in Presence of Inorganic Colloids." By Professor B. MOORE, FIR.S., and T. A. WEBSTER.

III. "The Isolation and Serological Differentiation of Bacillus teln i.Z By Captaini W. J. TIULLOCH, R.A.M.C. Commuinicated by Sir DAVID BRUCE, F.R:.S.

IV. "An Investigatio:n into the Periodicity of Measles Epidemics in the Different Districts of London for the Years 1890-- 1912." By J. BROWNLEE, M.D. Communicated by Sir AVALTER FLETCHER, F.R.S.



Vill

February 7, 1918.


The following Papers were read -

1. " The Photo-electric Action of X-Rays." By Prof. 0. V. RICHARDSON, -F.R.S.

II. "The Parent of Actinium." By Prof. F. SODDY, F.R.S., and J. A. CRANSTON.

III. " Some Problems in the Theory of Radiation." By Prof. ARTHURC SCHUSTER, Sec. R.S.

IV. "The Absorption of the Radiation emitted by a Palladium Anti- cathode in Rhodium, Palladiunm, and Silver." By E. A. OWEN. Communicated by Prof. A. W. PORTER, P.R.S.

Februairy 14, 1918.


The following Papers were read:-

I. " The Artificial Production of Echinoderm Larv.- with Tiwo Water-vascular Systems, and also of Larva3 Devoid of a Water-vascular System." By Prof. E. W. MAcBRIDE, F.R.S.

II. "Oi the Quantitative Differences in the Water-conductivity of the Wood in Trees and Shrubs." By Prof. J. B. FARMER, P.R.S.

III. "On the Efficiency of Muscular Work." By Capt. M. GREEN- WOOD. Communicated by Prof. L. HILL, F.R.S.

Febr-uary 21, 1918.



I. " On the Scattering of Light by Spherical Shells, and by Com- plete Spheres of Periodic Structure, when the Refractivity is Small." By LORD RAYLEIGH, O.M., FP..S.

II. "t On the Nature of Heat as Directly Deducible from the Postulate of Carnot." By Sir JOSE.PH LARMOR, FP..S.



III. "Cur-ved Beams." By J. J. GUEST. Commi-nicated by Prof. W. E. DALPY, F.R.S,

IV. "On Monioclinic Double Selenates of the Iron Group." By Dr. A. E. H. TUTTON, F.R.S.

V. "Selenic Acid and Iron.-Reductionl of Selenic Acid by Nascent Hydrogen and Hydrogen Sulphide.-Preparation of Ferrous Selenate and Double Selernates of Iron Group."- By Dr. A. E. H. TUTTON, F.R.S.

Febrmta'ry 28, 191.8.

Sir J. J. THOMSON, O.M., President, inl the (Chair.

Prof. WTilliam Wallace Campbell, Dr. Grove Karl Gilbert, Prof. Luigi Luciani, Prof. Jean Perrin, and Prof. Patul Sabatier were elected Foreign Members of the Society.

In pursuance of the Statutes the names of the Candidates recommended for election into the Society were read from the Chair as follows

Boiton, Charles. Carpenter, Henry Cort Harold. Chapmani, Thomas Algernon. Conynghanm, Gerald Ponsonbby

Lenox. Dobell, Cecil Clifford. Gold, Ernest. Guppy, Hellry Br oughamn.

Hadeock, Albert George. Hill, Archibald Vivian. Irvine, James Golquhoun. Lewis, Thomas. Ranlanujan, Srinivasa. RIogers, Arthur William. Smiles, Samuiel. Sniith, Frank Edward.

The following Papers were read:- I. "Scattering of Light by Dust-free Air, with Artificial Repro

duction of Blue Sky.-Prelimiinary Note." By the Hon. R. J. STRUTT, F.R.S.

II. "The Lommel-Weber Uu Fuiction and its Application to the Problem of Electric Waves on a Thin Ailchor Ring." By J. XI. AIrEY, I).Sc. Communicated by Prof. J. W. NICHOLSON, F.R.S.

Ill. 'Investigatioins on Textile Fibres." By W. HARRISON. Conl- municated by Prof. W. H. B XAGG, F.R.S.

IV. "Critical Loading of Strutts and Structures." By W. L. COWLEY arnd H. LEVY. Com:.municated by Sir -RICHARD GLAZEBROOK, F.R.S.



x

March 7, 19,18.

Sir J. J. THOMSON, O.M., Presidenit, in the Chair. The following Papers were read: 1. "On the Numerical Solution of Integral Equiations." By Prof.

E. T. WHITTAKER, F.R.S. II. "Or the Cesairo Conivergence of Rtestricted Fourier Series." FPy

Prof. W. H. YOTNG, F.R.S. :III. "On Non-Harmonic Trigonometrical Series." Bv Prof. W. H.

YOUNG, F.R.S. IV. "The Electromagnetic Inertia of the LoIent,z Electroni." By

Prof. G. A. SCJ:OTT. Communicated by Prof. J. W. NICHOLSON, F.R.S.

V. "Researches on Growth and Movement in Planits by Meatns of the High Magnificationi Crescograph." By Sir J. C. BOSE. Communicated by Prof. S. H. VINES, 1F.R.S.

Mctrch 14, 1918.

Sir J. J. THOMSON, O.M., Presidenit, in the Chair. The following Papers weie read:

I. " Oni an Expansion of the Point-Potential." B3y A. W. CONWAY, F.R.S.

II. "The Lunar and Solar Diurnial Variations of Water Level in a Well at Kew Observatory, Richmond. Communicated bv Sir NAPIER SHIAW, F.1:.S.

Mal-ch 21, 1_918. Sir J. J. THOMSON, O.m., Presidenit, in the Chair.

Dr. Charles S. Myers was admitted into the Society. The following papers were read:

I. "The Magnetic Storm of December 16--17, 1917, as recorded aIt Kew and Eskdalemiiir Observatories." By C. CmI1EEI, F.R.S.

II. "The Absorption of X-Rays." By E. A. OWEN. Communicatedl by Prof. A. 7. PORTER, F.P.S.

The Society adjourrned over the Easter Recess to Thursday, April 25.



xi

April 25, 1918.


The Bakerian Lecture was delivered by the Hon. Sir CHARLES

PARSONS, K.C.B., F.R.S., on "Experiments on the Production of Diamond."

May 2, 1918.

Annual Meeting for the Election of Fellows.


The Statutes relating to the Election of Fellows having been'read, Sir Henry Jackson and Prof. John Perry were, with the consent of the Society, nominated Scrutators, to assist the Secretaries in the examination of the balloting lists.

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

Bolton, Charles. Carpenter, Henry Cort Harold. Chapman, Thomas Algernon. Conyngham, Gerald Ponsonby

Lenox. Dobell, Cecil Clifford. Gold, Ernest. Guppy, Henry Brougham.

Hadeock, Albert George. Hill, Archibald Vivian. Irvine, James Colquhoun. Lewis, Thomas. Ramanujan, Srinivasa. Rogers, Arthur William. Smiles, Samuel. Smith, Frank Edward.

May 2, 1918.



I. "On Nerve End Cells in the Dental Pulp." By J. H. MUMMERY, D.Sc. Communicated by Sir ERNEST SCHAFJER, F.R.S.

II. " The Nature of Growths in Colloidal Silica Solutions." By H. ONSLOW. Communicated by Dr. F. G. HOPKINS, F.R.S.



xii

JKay 9, 1 918.


Dr. C. Bolton, Dr. T. A. Chapman I Mr. A. V. Hill, Prof. J. C. Ir-vine, Dr. T. Lewis, Dr. S. Smiles, and Mr. F. E. Smith, were admitted into the Society.

The following Papers were read:- I. "Contribution to the Theory of Attraction when the Force varies

as arny Power of the Distance." - By AMajor P. A. MACMAHON, *F.R.S., and H. B. C. DARLING.

II. "Electromagnetic Integrals." Sir GEORGE GREENHILL, F.R.S. III. "On Intensity Relations in the Spectruin of Helium." By T. R.

MERTON, D.Sc., aInd J. W. NICH-IOLSON, F.R.S.

IV. "An Outline of a Theory of Magnetic Storms." By S. CHAPMAN, D.Sc. Commuinicated by Sir F. DYSON, F.L.S.

Lfay 16, 1918.

Sir J. J. THOMSONT, O.M., President, in the Chair.

Mr. C. Dobell, Major E. Gold, Colonel A. G. Hadeock, and Prof. H. C. H. Carpenter, were admnitted into the Society.

The following Papers were read;- I. "Note on Certain Coloured Interferenice Bands and the Colours

of Tempered Steel." By A. MALLOCK, F.R.S.

II. "4On General Factors in Mental Aleasurements."' By J. C. MA. GARNETT. Communicated by Prof. A. N. WHITEHEAD, F.IR.S.

III. " On the Absorption of X-Rays in Copper and Aluminium." By C. M. WILLIAMS. Commuunicated by Prof. E. H. GRIFFITHS, F.R.S.

IV. " On the Electrical Resolution and Broadening of Helium Lines." By T. R. MERTON, D.Sc. Coianiunicated by Prof. A. FOWLER, F.R.S.

The Society adjourned over the Whitsun Recess to Thursday, May 30.



xiii

May 30, 1918.


Mr. H. B. Guppy was admitted into the Society.

The following Papers were read: I. "A Method of Avoiding Collision at Sea." By Prof. J. JOLY,

F.R.S. II. "A Statistical Survey of Colour Vision." By R. A.: HOUSTOUN,

D.Sc. Communicated by Prof. A. GRAY, F.R.S.

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



xiv

June 6, 1918.

Sir J. J. THOMSON, O.M., Presidenit, in the Chair.

The following Paper was read:

I. " Brevity, Frequence of Rhythm, and Amount of Reflex Nervous Discharge, as Indicated by Reflex Contractioni." By N. B. DREYER and Prof. C. S. SHERRINGTON, F.R.S.

June 13, 1918.



1. "Experiments on the Effect of the Vibration of a Stretched Wire forming Part of a Closed Electric Circuit." By Admiral Sir HENRY JACKSON, G.C.B., F.R.S.

II. "Note on the Effect of Wind Pressure on the Pitch of Organ Pipes." By A. MALLOCK, F.R.S.

III. "The Diamagnetism of Hydrogen and the Value of the Magneton." By A. E. OXLEY, D.Sc. Communicated by Prof. J. W. NICHOLSON, F.R.S.

June 20, 1918.


THE CROONIAN LECTURE-"; The Physiological Basis of Thirst " was delivered by Major W. B. CANNON, M.R.C., U.S. Army.



June 27, 1918.


The followinig Papers were read.-

I. "Periodic Irrotationial Waves of F?iuite Height." By Prof. T. H. HAVELOCKI, P..S.

II "The Diffraction of Electric W aves 'by the Earth." By G. N.\VATSON, D.Sc. Coim nunicated by Piof. J. W. NICHOLSON, 1F.R. S.

iII, Concerning Emotive Phenomenia. Part II.-Periodic Varia- tioans of Couiductance of the Palm of the Hunian Hand." By Dr. A. D. WALLiE,R F.R.S.

1T " The MAechanism a'id Co:ntrol of Fibrillation in the Mammalian Heart.' By Prof. J, A. MACWILLIAM, F.R.S.

V. " The Development of tdae Sea A- nem-one.), Atinoloba dianlhws grl(9 .andc Adam palliate. 3 y 4.- GEMMILL,

' D.Se, Com- municated by Prof. E, W, MA't; iB EDL _F.R.S.

'VI. A; Oin the Occurrence of V_I,UJbitnucleate Cells in Vegetative TissuLes."' By P.t BEMn, a-nd AGNFEs, A _.Ra ea.ER Co .i lt-rnmlicated

by Prof. J. . FARME1P,t, FJKo eS V11i. "T-he Epithelial Sherthl of H-1ertwiuig iu tjhe Teeth. of Alan, with

:Notes out the, Follicle a( N asimyth's Meirbra nec" I y J. H. Mum i-mY5 D.Sce. Cormiunicated by Sir E. SCImFERv, F.R.S.

VIlI. "The Periiods of Latera9; Vibtion fi Loaded Slyafts.--Tr1he Rational Derivati,tiont of tI)lnkeriey's Empirical- Rule for Deter- mi.1ing, WXhirlirng Speeds." By H. 1L JEFFCOTL. Coin- mnunicated by Prof. WV. Mc K Oun, 7R.S.

IX. ' On the Spectrum of Cadmiuni in the Inactive Gases." By Prof. NORnAN COLLIE, F.R.S., ariid H. E. WATSON, D.Sc,

X. "Further Experiments on Spontaneous Generation of Heat in Recently Hardened Steel." 13y C. F. BnjsiJi, Sir ROBERT HADFI ELD, FR.S., and S. A. MA1N.

xI. "The Slow Contraction of Hardened Carbeon Steel.s." By T. MATSUSHITA. Comrnuinicatcd by Sir ROBERT HADFIELD, F.R.S.

The Society adjourned over the Lonig Vacation to Thursday, November 7.



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