INDEX t o VOL. L.

ABNEY (W. de W.) and Maj.-Gen. Festing, colour photometry. Part III, 369.

Adami (J. G.) and C. S. Roy, contributions to the physiology and pathology of the mammalian heart, 435.

Adams (W. G.) comparison of simultaneous magnetic disturbances at several observatories, and determination of the value of the Gaussian functions for those observatories, 129.

Address of the President, 219.Addresses of sympathy to the Queen

and the Prince and Princess of Wales, 318.

----- ----- letters of acknowledgmentfor, 318, 431.

Agassiz (Alexander) elected a foreign member, 194.

Air thermometer, on a compensated (Callendar), 247.

Aleock (A.) and J. Wood-Mason, further observations on the gestation of Indian rays ; being natural history notes from H.M. Indian Marine Survey steamer “ Investigator.” Series 2, No. II, 202.

Alloys, on certain ternary. Part Y. Determination of various critical curves, and their tie-lines and limiting points (Wright), 372.

—— on the melting points of the gold- . aluminium series of (Roberts-Austen),

367.----- of nickel and iron, note on the

density of (Hopkinson), 121. Alternating electric currents, repulsion

and rotation produced by (Walker), 255.

Aluminium-gold alloys, on the melting points of (Roberts-Austen), 367.

Anderson (William) elected, 1.----- admitted, 166.Anniversary meeting, 218.Apteryx, additional observations on the

development of (Parker), 340. Armstrong (H. E.) and G. H. Robert

son, a study of the Plante lead- sulphuric acid-lead peroxide cell, from a chemical standpoint. Part II. A discussion of the chemical changes occurring in the cell, 108.

Audibility of single sound waves, and the number of vibrations necessary to produce a tone, note on the (Herroun and Yeo), 318.

Auditors elected, 166.----- report of, 218.Auriga, on the new star in (Lockyer),

407, 466. (See also Nova Aurigse.) Ayrton (W. E.) and H. Kilgour, the

thermal emissivity of thin wires in air, 166.

----- J. Perry, and W. E. Sumpner,quadrant electrometers, 53.

Bayliss (1Y. M„) and E. H. Starling, on the electromotive phenomena of the mammalian heart, 211.

Biologic regions and tabulation areas,.on (Clarke), 472.

Blood, preliminary note on the behaviour of sugar in (Harley), 442.

Bonney (T. G.) note on some specimens of rock which have been exposed to high temperatures, 395.

Bower (Frederick Orpen) elected, 1. ----- admitted, 166.----- studies in the morphology of spore-

producing members. | Preliminary statement on the Lycopodinse and Ophioglossacese, 265.

Brady (Henry Bowman) obituary notice of, x.

Brennand (W.) on Hindoo astronomy, 254.

Brunton (T. L.) and S. Delepine, on some of the variations observed in the rabbit’s liver under certain physiological and pathological circumstances,209.

Burbury (S. H.) on the collision oi elastic bodies, 175.

Burch (G. J.) on the time-relations of the excursions of the capillary electrometer, with a description of the method of using it for the investigation of electrical changes of slior duration, 172.

Burton (C. I.) and W. Marshall, on the measurement of the heat produced by compressing liquids and solids, 130.

Caird (Sir James) obituary notice of, xiii.

f

x v ii i INDEX.

Callendar (H. L.) on a compensated air thermometer, 247.

Cannizzaro (Stanislao) awarded Copley medal, 229.

Capillary electrometer, on the time- relations of the excursions of the, with a description of the method of using it for the investigation of electrical changes of short duration (Burch), 172.

Carbonic acid, researches on the absorption of oxygen and formation of, in ordinary human respiration and in the respiration of air containing an excess of carbonic acid (Marcet), 58.

Cardew (Major) on a differential electrostatic method of measuring high electrical resistances, 340.

Charters of the Royal Society, summary of the second and third, 479.

Chlorophyll, contributions to the chemistry of. No. IV (Schunck), 143, 302.

Chromatin, on the demonstration of the presence of iron in, by micro-chemical methods (Macallum), 277.

Circulation and respiration, on the changes evoked in the, by electrical excitation of the floor of the 4th ventricle (Spencer), 142.

Clarence and Avondale, Duke of, announcement of his death, 318.

------------ meeting adjourned, 318.Clarke (C. B.) on biologic regions and

tabulation areas, 472.Clowes (F.) an apparatus for testing the

sensitiveness of safety-lamps, 122.Coal-measures, on the organisation of

the fossil plants of the. Part XIX (Williamson), 469.

Cockle (Sir J.) elected an auditor, 166.Collision of elastic bodies, on the (Bur-

bury), 175.Colour photometry. Part I I I (Abney

and Resting), 369.Common (A. A.) note on the necessity of

using well-annealed and homogeneous glass for the mirrors of telescopes, 252.

Conroy (Sir John) elected, 1.----- admitted, 79.Council, nomination of, 194.----- election of, 231.Crookes (W.) on electrical evaporation,

88 .Crossley (A. W.) and A. Schuster, on

the electrolysis of silver nitrate in vacuo, 344.

Crustacea, on some histological features and physiological properties of the postoesophageal nerve cord of the (Hardy), 144.

Crystals, on the thermal conductivities

of, and other bad conductors (Lees) 421.

Cunningham (Daniel John) elected, 1.----- admitted, 120.Cyclones, the origin and progressive

motions of, in the Western India region (Dallas), 121.

Dallas (W. L.) the origin and progressive motions of cyclones in the Western India region, 121.

Dawson (Q-eorge Mercer) elected, 1.Delepine (S.) and T. L. Brunton, on

some of the variations observed in the rabbit’s liver under certain physiological and pathological circumstances, 209.

Dewar (J.) his experiment with liquid oxygen and the magnet, 247, 261.

----- his experiment with liquid ozoneand the magnet, 261.

Dines (W. H.) on the pressure of wind on curved vanes, 42.

Donation Fund, grants from the, 246.Duncan (Peter Martin) obituary notice

of, iv.

Earth, on a determination of the mean density of the, and the gravitation constant, by means of the common balance (Poynting), 40.

Elastic bodies, on the collision of (Bur- bury), 175.

Election of Council and Officers, 231.----- of Fellows, 1, 318.Electric currents, repulsion and rota

tion produced by alternating (Walker), 255.

----- organ of the skate, the (Ewart),474.

Electrical changes of short duration, on the time-relations of the excursions of the capillary electrometer, with a description of the method of using it for the investigation of (Burch), 172.

-----evaporation, on (Crookes), 88.----- excitation of the floor of the 4th

ventricle, on the changes evoked in the circulation and respiration by (Spencer), 142.

----- resistances, on a differential electrostatic method of measuring high (Cardew), 340.

Electrolysis of silver nitrate in vacuo, on the (Schuster and Crossley), 344.

Electromagnetic field, on the forces, stresses, and fluxes of energy in the (Heaviside), 126.

Electrometer, on the time-relations of the excursions of the capillary, with a description of the method of using it for the investigation of electrical

INDEX. XI X

changes of short duration (Burch), 172.

Electrometers, quadrant (Ayrton, Perry, and Sumpner), 53.

Electromotive phenomena of the mammalian heart, on the (Bayliss and Starling), 211.

Electrostatic method of measuring high electrical resistances, on a differential (Cardew), 340.

Elliott (Edwin Bailey) elected, 1.----- admitted, 79.Ethyl alcohol, on the mechanical

stretching of liquids : an experimental determination of the volume-extensibility of (Worthington), 423.

Evaporation, on electrical (Crookes), 88. Ewart (J. C.) the electric organ of the

skate : observations on the structure, relations, progressive development, and growth of the electric organ of the skate, 474.

Fellows admitted, 79, 120, 166.----- deceased, 219.----- elected, 1, 219, 318.----- number of, 242, 515.Festing (Maj.-Gen.) and W. de W.

Abney, colour photometry. Part III, 369.

Financial statement, 233.Flesh, on the bases (organic) in the

juice of. Part I (Johnson), 287. Foreign members, election of, 194.Fossil plants of the coal-measures, on

the organisation of the. Part XIX (Williamson), 469.

Foster (M.) note on the history of the statutes of the Royal Society, 501.

Frankland (Percy laraday) elected, 1. ----- admitted, 120.Friction in the bores of rifled guns,

note on the energy absorbed by (Noble), 409.

Galton (F.) elected an auditor, 166. Gaussian functions, determination of

the value of the, and comparison of simultaneous magnetic disturbances at several observatories (Adams), 129.

Gestation of Indian rays, further observations on th e ; being natural history notes from H.M. Indian Marine Survey steamer “ Investigator.” Series 2, No. II (Wood-Mason and Alcock), 202.

Gilchrist (Percy C.) elected, 1.----- admitted, 79.“ Ginger-beer plant ” and the organisms

composing i t : a contribution to the study of fermentation-yeasts and bacteria (Ward), 261, 358.

Gold-aluminium series of alloys, on the melting points of the (Roberts-Austen), 367.

Gould (Benjamin Aptliorp) elected a foreign member, 194.

Government Grant of 4,000Z., account of the appropriation of the, 242.

Grant (James Augustus), obituary notice of, xiv.

Gravitation constant and mean density of the earth, on a determination of the, by means of the common balance (Poynting), 40.

Guns, note on the energy absorbed by friction in the bores of rifled (Noble), 409.

Halliburton (William Dobinson) elected,1 .

----- admitted, 79.Hardy (W. B.) on some histological

features and physiological properties of the postcesophageal nerve cord of the Crustacea, 144.

Harley (V.) the role played by sugar in the animal economy. Preliminary note on the behaviour of sugar in blood, 442.

Hawkshaw (Sir John) obituary notice of, i.

Heart, contributions to the physiology and pathology of the mammalian (Roy and Adami), 435.

-----on the electromotive phenomenaof the mammalian (Bayliss and Starling), 211.

Heat produced by compressing liquids and solids, on the measurement of the (Burton and Marshall), 130.

Ileatlicote (F. G.) See F. G. Sinclair.Heaviside (Oliver) elected, 1.-----on the forces, stresses, and fluxes

of energy in the electromagnetic tie.d, 126.

Hemisection of the spinal cord in monkeys, results of (Mott), 120.

Herroun (E. F.) and G. F. Yeo, note on the audibility of single sound waves, and the number of vibrations necessary to produce a tone, 318.

Herschell (Lord) elected, 318.----- admitted, 407.Hill (M. J. M.) on the locus of singular

points and lines which occur in connexion with the theory of the locus of ultimate intersections of a system of surfaces, 180.

Hindoo astronomy, on (Brennand), 254.Hopkinson (J.) note on the density of

alloys of nickel and iron, 121.Huggins (W.) and Mrs. Huggins, pre

liminary note on Nova Auriga;, 465.

XX INDEX.

Hydrogen and oxygen, on the relative densities of, II "(Rayleigh), 448.

Instability of periodic motion, on (Thomson), 194.

Iron and nickel, note on the density of alloys of (Hopkinson), 121*

----- and other magnetic substances, onthe influence of temperature upon the magnetisation of (Wilde), 109.

----- in chromatin, on the demonstration of the presence of, by microchemical methods (Maeallum), 277.

Jeffery (Henry Martyn) obituary notice of, vii.

Johnson (Gr. S.) on the bases (organic) in the juice of flesh. Part I, 287.

Kew Committee, appendix to report for 1890, 155.

Kilgour (H.) and W. E. Ayrton, the thermal emissivity of thin wires in air, 166.

Langley (J. N.) on the origin from the spinal cord of the cervical and upper thoracic sympathetic fibres, with some observations on white and grey rami communicantes, 446.

Lapworth (Charles) awarded Royal medal, 229.

Larynx, on the mechanism of the closure of the. Preliminary communication (Stuart), 323.

Lees (C. H.) on the thermal conductivities of crystals and other bad con-

on the dis-

Liquids, on the mechanical stretching of, an experimental determination of the volume - extensibility of ethyl alcohol (Worthington), 423.

Liver, on some of the variations observed in the rabbit’s, under certain physiological and pathological circumstances (Brunton and Delepine), 209.

Lockyer (J. N.) note on the spectrum of Nova Aurigse, 431.

-----on the new star in Auriga, 407,466.

Locus of singular points and lines which occur in connexion with the theory of the locus of ultimate intersections of a system of surfaces, on the (Hill), 180.

Lodge (O. J.) experiments on the discharge of Leyden jars, 2.

ductors, 421.Leyden jars, experiments

charge of (Lodge), 2.

lion of the presence of iron in chromatin by micro-chemical methods, 277.

Magnetic disturbances at several observatories, comparison of simultaneous, and determination of the value of the Gaussian functions for those observatories (Adams), 129.

Magnetisation of iron and other magnetic substances, on the influence of temperature upon the (Wilde), 109.

Mammalian heart, contributions to the physiology and pathology of the (Roy and Adami), 435.

------------ on the electromotive phenomena of the (Bayliss and Starling),211.

Marcet (W.) researches on the absorption of oxygen and formation of* carbonic acid in ordinary human respiration, and in the respiration of air containing an excess of carbonic acid, 58.

Marr (John Edward) elected, 1.----- admitted, 79.Marshall (W.) and C. I. Burton, on

the measurement of the heat produced by compressing liquids and solids, 130.

Maxwell-Boltzmann doctrine regarding distribution of energy, on some test cases for the (Thomson), 79.

Mean density of the earth and the gravitation constant, on a determination of the, by means of the common balance (Poynting), 40.

Medals in the possession of the Royal Society, catalogue of the, 524.

Medals, presentation of the, 229.Meyer (Victor) awarded Davy medal,

231.Mirrors of telescopes, note on the

necessity of using well-annealed and homogeneous glass for the (Common), 252.

Mond (Ludwig) elected, 1.----- admitted, 79.Mott (F. W.) results of hemisection of

the spinal cord in monkeys, 120.Myriapod a, a new mode of respiration

in the (Sinclair), 200, 358.

Nickel and iron, note on the density of alloys of (Hopkinson), 121.

Noble (A.) note on the energy absorbed by friction in the bores of rifled guns, 409.

Nova Aurigge, note on the spectrum of (Lockyer), 431. (See Auriga.)

------------ preliminary note on (Huggins and Huggins), 465.Macallum (A. B.) on the demonstra-

INDEX. X X 1

Obituary notices of Fellows deceased : Brady, Henry Bowman, x.Caird, Sir James, xiii.Duncan, Peter Martin, iv.Grant, James Augustus, xiv.Hawksliaw, Sir John, i.Jeffery, Henry Martyn, vii.Paget, Sir George Edward, xiii.

Officers, nomination of, 194.----- election of, 231.Oxygen, experiment on magnetism of

liquid, 247, 261.----- researches on the absorption of,

and formation of carbonic acid, in ordinary human respiration and in the respiration of air containing^ an excess of carbonic acid (Marcet), 08.

----- and hydrogen, on the relativedensities of, No. IT (Rayleigh), 448.

Ozone, experiment with liquid, 261.

Paget (Sir George Edward) obituary notice of, xiii.

Parker (T. J.) additional observations on the development of Apteryx, 340.

Periodic motion, on instability of (Thomson), 194.

Perry (J.), "W. E. Sumpner, and XV. E.Ayrton, quadrant electrometers, 53.

Photometry, colour. Part I I I (Abney and Festing), 369.

Plante lead-sulphuric acid-lead peroxide cell, a study of the, from a chemical standpoint. Part I (Robertson), 105.

------------Part II. A discussion of thechemical changes occurring in the cell (Armstrong and Robertson), 108.

Portraits and busts in the apartments of the Royal Society, list of, 516.

Postcesophageal nerve cord of the Crustacea, on some histological features and physiological properties of the (Hardy), 144.

Poynting (J. H.) on a determination of the mean density of the earth and the gravitation constant by means of the common balance, 40.

Presents, lists of, 76, 118, 144, 187, 214, 257, 274, 359, 403, 425, 443, 463, 476.

President, address of the, 219.----- congratulations of Society offered

to, on his elevation to the peerage, 318.

Quadrant electrometers (Ayrton, Perry, and Sumpner), 53.

Queen, address of sympathy to the, 318.

------------letter of acknowledgment for,431.

Rami communicantes, some observations on white and grey (Langley), 416.

Ramsay (W.) and S. Young, on some of the properties of wrater and of steam,254.

Rayleigh (Lord) on the relative densities of hydrogen and oxygen. No. II, 448.

Rays, further observations on the gestation of Indian; being natural history notes from 1I.M. Indian Marine Survey steamer “ Investigator.” Series II, No. 2 (Wood-Mason and Alcock), 202.

Repulsion and rotation produced by alternating electric currents ( Walker),255.

Respiration, researches on the absorption of oxygen and formation of carbonic acid in ordinary human, and in the respiration of air containing an excess of carbonic acid (Marcet), 58.

----- and circulation, on the changesevoked in the, by electrical excitation of the floor of the 4th ventricle (Spencer), 142.

----- in the Mvriapoda, a new mode of(Sinclair), 200, 358.

Roberts-Austen (W. C.) on the melting points of the gold-aluminium series of alloys, 367.

Robertson (G. II.) a study of the Plante lead-sulphuric acid-lead peroxide cell from a chemical standpoint. Part I, 105.

----- and H. E. Armstrong, a study ofthe Plants lead-sulphuric acid-lead peroxide cell from a chemical standpoint. Part II. A discussion of the chemical changes occurring in the cell, 108.

Rock, note on some specimens of, which have been exposed to high temperatures (Bonney), 395.

Roy (C. S.) and J. G. Adami, contributions to the physiology and pathology of the mammalian heart, 435.

Rucker (Arthur W.) awarded Royal medal, 230.

Safety-lamps, an apparatus for testing the sensitiveness of (Clowes), 122.

Sauropterygia, the nature of the shoulder girdle and clavicular arch in (Seeley), 446.

Schunck (E.) contributions to the chemistry of chlorophyll. No. I \ , 143, 302."

Schuster (A.) and A. W. Crossley, on the electrolysis of silver nitrate in vacuo, 341.

x x ii INDEX. .

{Seeley (H. G.) the nature of theshoulder girdle and clavicular arch in Sauropterygia, 446.

Shaw (William Napier) elected, 1.----- admitted, 120.Silver nitrate in vacuo, on the electro

lysis of (Schuster and Crossley), 344.

Sinclair (F. G.) a new mode of respiration in the Myriapoda, 200, 358.

Skate, observations on the structure, relations, progressive development, and growth of the electric organ of the (Ewart), 474.

Sound-waves, note on the audibility of single, and the number of vibrations necessary to produce a tone (Herroun and Yeo), 318.

Spectrum of Nova Aurigse, note on the (Lockyer), 431. (See also 407, 466.)

Spencer (W. G.) on the changes evoked in the circulation and respiration by electrical excitation of the floor of the 4th ventricle, 142.

Spinal cord in monkeys, results of hemi- section of the (Mott), 120.

Spore-producing members, studies in the morphology of. Preliminary statement on the Lycopodinse and Opliio- glossaceae (Bower), 265.

Stainton (H. T.) elected an auditor, 166.

Starling (E.H.) and W. M. Bayliss, on the electromotive phenomena of the mammalian heart, 211.

Statutes of the Boyal Society (1891), 483.

----- a note on the history of the (Foster),501.

Steam and water, on some of the properties of (Ramsay), 254.

Strasburger (Eduard) elected a foreign member, 194.

Stuart (T. P. A) on the mechanism of the closure of the larynx. Preliminary communication, 323.

Sugar in the animal economy, the role played by. Preliminary note on the behaviour of sugar in blood (Harley), 442.

Sumpner (W. E.), W. E. Ayrton, and J. Perry, quadrant electrometers, 53.

Surfaces, on the locus of singular points and lines which occur in connexion with the theory of the locus of ultimate intersections of a system of (Hill), 180.

Sympathetic fibres, on the origin from the spinal cord of the cervical and upper thoracic (Langley), 446.

Tabulation areas and biologic regions, on (Clarke), 472.

Tacchini (Pietro) elected a foreign member, 194.

Ternary alloys, on certain. Part Y. Determination of various critical curves and their tie-lines and limiting points (Wright), 372.

Thermal conductivities of crystals and other bad conductors, on the (Lees), 421.

Thermal emissivity of thin wires in air (Ayrton and Kilgour), 166.

Thermometer, on a compensated air (Callendar), 247.

Thompson (Silvanus Phillips) elected, 1.----- admitted, 79.Thomson (Sir W.), offered congratula

tions of Society on his elevation to the peerage, 318.

----- on instability of periodic motion,194.

----- on some test> cases for the Max well-Boltzmann doctrine regarding distribution of energy, 79.

Tizard (Thomas Henry) elected, 1.----- admitted, 79.Trust funds, 237.

Yanes, on the pressure of wind on curved (Dines), 42.

Yice-Presidents, appointment of, 247.

Wales, Prince and Princess of, address of sympathy to the, 318. ^

------------ letter of acknowledgmentfor, 318.

Walker (G. T.) repulsion and rotation produced by alternating electric currents, 255.

Ward (H. M.) the “ ginger-beer plant ” and the organisms composing i t : a contribution to the study of fermentation-yeasts and bacteria, 261, 358.

Water and steam, on some of the properties of (Ramsay and Young), 254.

Wilde (H.) on the influence of temperature upon the magnetisation of iron and other magnetic substances, 109.

Williamson (W. C.) on the organisation of the fossil plants of the coal- measures. Part XIX, 469.

Wind, on the pressure of, on curved vanes (Dines), 42.

Wood-Mason (J.) and A. Alcock, further observations on the gestation of Indian rays; being natural history notes from H.M. Indian Marine Survey steamer u Investigator. Series 2, No. 11, 202.

Worthington (A. M.) on the mechanical stretching of liquids : an experi-

INDEX. x x iii

menial determination of tbe volume- extensibility of ethyl alcohol, 423.

Wright (C. R. A.) on certain ternary alloys. Part V. Determination of various critical curves, and their tielines and limiting points, 372.

Yeo (G. F.) and E. F. Herroun,note on the audibility of single sound waves, and the number of variations necessary to produce a tone, 318.

Young' (S.) and W. Ramsay, on some of the properties of water and of steam, 254.

END OF FIFTIETH VOLUME.

HARRISON AND SONS, PRINTERS IN ORDINARY TO HER MAJESTY, ST. M A R TIN ?S LANE.