J O U R N A L O F THE CHEMICAL SOCIETY. TRANSACTIONS. H. E. ARMSTRONG, Ph.D., F.R.S. E. DIVERS, M.D., F.R.S. WYNDHAM R. DuNs'rAN, M.A., F.R.S. H. J. H. FENTON, M.A., F.R.S. P. F. FRANKLAKD, LL.D., F.R.S. H. MCLEOD, F.R.S. 1 Sir WILLIAM RAMSAY, K.C.B., LL. D., F.R.S. J. EMERSON REYNOLDS, Sc.D., F.R.S. A. SCOTT, D.Sc., F.R.S. T. E. THORPE, C.R., LL.D., F.R.S. W. A. TILDEN, D.Sc., F.R.S. &bitax : W. P. WYNNE, D.Sc., F.R.S. S;ub-@:bifor : A. J. GREESAWAY. 1902. Vol. LXXXI. LONDON: GURNEY & JACKSON, 1, PATERNOSTER ROW 1902.RICHARD CLAY 8 SONS, LIMITED, LONDON & BUNQAYJ O U R N A L OF THE CHEnilICAL SOCIETY. TRIANSACTIONS. H. E. ARMSTRONG, Ph. D., F.R.S. E. DIBERS, M.D., F.R.S. WYNDHAM R. DUNSTAN, M. A., F. R.S. H. J. H. FENTON, M.A., F.R.S. P. F. FRANKLAND, LL.D., F.R.S.H. MCLEOD, F.R.S. Sir WILLIAM RAMSAY, K. C. B., LL.D., J. EMERSON REYNOLDS, Sc. D., F. R.S. A. SCOTT, D.Sc., F.R.S. T. E. TIIoRm, C.B., LL.D., F.R.S. W. A. TILDEN, D.Sc., F.R.S. F. R. S. mifar : W. P. WYNNE, D.Sc., F.R.S. Snb- @:,bitor : A. J. GREENAWAY. 1902, Vol. LXXXI. Part I. _______ LONDON: GURNEY & JACKSON, 1, PATERNOSTER ROW. 1902.ILlCfiARD CLAY & SONS, LIMITED, LONDON & Buh-GAY.J O U R N A L O F THE CHEMICAL SOCIETY, TRANSACTIONS. dthrnmittte o f H. E. ARMSTRONG, Ph.D., F.R.S. E. DIVERS, M.D., P.R.S. WYNDHAM R. DUNSTAN, M.A., F.R.S. H. J. H. BENTON, M.A., F.R.S. P. F. PRANKLAND, LL.D., F.R.S. H. MCLEOD, F.R.S. gnXr1icwtion : Sir WILLIAM RAMSAT, K.C. R., LL.D., J. EMERSON REYNOLDS, S C . ~ . , F.R.S. A. SCOTT, D.Sc., F.R.S.T. E. THORPE, C.B., LL.D., F.R.S. W. A. TILDEN, D.Sc., F.R.S. F.R.S. @;bitox : W. P. WYNNE, D.Sc., F.R.S. 1902. Vol. LXXXI. Part 11. -I LONDON : GURNEY & JACKSON, 1, PATERNOSTER ROW. 1902.RICHARD CLAY 8s SONS, LIMITED, LONDOX & BUNGAY.RICHARD CLAY 8s SONS, LIMITED, LONDOX & BUNGAY.C O N T E N T S . PAPERS COMMUNICATED TO THE CHEMICAL SOCIETY. 1.-The Oxidation of Sulphurous Acid to Dithionic Acid by Metallic Oxides. By H. C. H. CARPENTER . 11.-The Production of hitherto unknown Metallic Borides. By SAMUEL AUCHMUTY TUCKER, Ph.B., and HERBERT R. MOODY, B.S., M.A. 111.-The Constitution of the *4cids obtained from a-Dibromo- camphor. By ARTHUR LAPWORTH and WALTER H. LENTON. 1V.-Note on the Reduction of Trinitrobenzene and Trinitrotolu- ene with Hydrogen Sulphide.By JULIUS B. COHEN and HENRY D. DAKIN . V.-The Synthesis of A1 kyltricarbnllylic Acids. BJ’ WILLIAN A. B o ~ and CHARLES H. G. SPRANKLING TI.-The Byomination of Trimetliylsuccinic Acid and the Inter- action of Ethyl Bromotrimethylsuccinate and Ethyl Sodio- cyanoacetate. By WILLIAM A. BONE and CHAHLEY H. G. SPRANKLING . VI1.-The Constituents of the Essential Oil of Asamma canudense. By FREDERICK 56. POWER and FREDERIC H. LEES VII1.-Derivatives of Gallic Acid. By FREDERICK B. POWER and FRANK SHEDDEN . 1X.-Thiocarbnmide Hydrochloride. By HENR 1’ P. STEVENS, M.A.,Ph.D. . X.-A Method for Determining Small Quantities of Carbon- ates. By ALFRED DANIEL HALL and EDWARD Joim ~ J S S E L L XI.-Influence of Substitution on the Formation of Dimoarnines and Aminoazo-compounds.By GILBERTHOMAS MORGAN,D.SC. XI1.-Cyanohydroxypyridine Derivatives from Diacetonitrile. New Derivatives of $-Lutidostyril. By JAMES MOIR, M.A., B.Sc., 1851 Exhibition Scholar of Aberdeen University . XII1.-The Determination of Available Plant Food in Soils by the use of Weak Acid Solvents. By ALFRED DANIEL HALL and FRANCIS JOSEPH PLYMEN . X1V.-Corydalino. Part VII. The Constitution of Cory- daline. By JAMES J. DOBBIE, M.A., D.Sc., and ALEXANDER LAUDER, B.Sc. . Berberidic Acid. By JAMES J. DOBBIE, M.A., D.Sc., and ALEXANDER LAUDER, B.8c. . . . XV.-The Relationship of Corydaline to Berberine. PAGE 1 14 17 26 29 50 59 73 i 9 81 86 100 117 145 157iv CONTENTS. XV1.-Studies in the Camphane Series, Part VI. Stereo- isomeric Halogen Derivatives of a-Benzoylcamphor. By XVI1.-The Action of Phosphorus Thiocyanate on Alcohol.By AUGUSTUS EDWARD DISON, M.D. . XVII1.-The Relationship between the Orientation of Sub-' stituents in and the Constitution of Benzeneazo-a-naphthol. By JOHN THEODORE HEWITT and SAMUEL JAMES MANSON AULD XIX. -The Magnetic Rotation of some Polyhydric Alcohols, Hexoses, and Disaccbaroses. By W. H. PERKIN, sen., Ph.D., F.R.S. . XX.-The Constitution of Hydrocyanic, C:y%nic, and Cyanuric Acids, By F. D. CHATTAWAY and J. MELLO WADMORE . XX1.-Myricetin. Part 11. By ARTHUR GEORGE PERKIN, F.R.S.E. . . - . XXI1.-The Colouring Matters of Green Ebony. By ARTHUR GEORGE PERKIN, F.R.S.E., and SAMUEL HENRY CLIFFORD BRIGGS, B.Sc. . XXII1.-Qn Rrnzilic Acid and the Constitution of Brazilin.By W. H. PERKIN, jun. , XX1V.-Brazilin and Hamat oxylin. Part 111. The Consti- tution of Hzematoxylin. By W. H. PERKIN, jun., and J. YATES . XXV.-On uu-Dimethylglut,aconic Acid and the Synthesis of isoCamphoronic Acid. By W. H. PERKIN, jun. . XXV1.-Tetrazoline. Part 11. By SIEGFRIED RUHEMANN and H. E. STAPLETON XXVI1.-Studies in the Camphane Series, Part VII. Con- version of Hyd roxycamphene into ,&Halogen Derivatives of Camphor. By MARTIN ONSLOW FOMTER . X XVIII. -Resolution of Trimethylh y drindonium Hydroxide in to its Optically Active Components. By FREDERIC STANLEY KIPPING . XX1X.-The Action of Methylene Diiodide on Aryl- and Naphthyl-amines, Diarylmethylenediamines, Acridines, and Naphthacridines. By ALFRED SENIER and WILLIAM GOODWIN XXX.-The Polymerisation of Cyanic Acid : Cyanuric Acid, and Cyamelide.By ALFRED SENIER and THOMAS WALSH . XXX1.-Magnetic Rotation of Riiig Compounds. Camphor, Limonene, Carvene, Pinene, and some of their Derivatives. By W. H. PERKIN, sen., Ph.D., F.R.S. XXXI1.--A Modification of Zeisel's Method for the Estima- tion of Methoxyl Groups. By J. T. HEWITT and T. S. MOORE . . . . B'IARTIN ONSLOW FORSTEZ and FRANCES fix. G. MICKLETHWAIT . PAGE 160 168 171 177 191 203 210 321 335 246 26 1 264 2 75 2so 290 292 318CONTENTS. V PAGE XXXIII. -The Radioactivity oE Thorium Compounds. I. An Investigation of the Radioactive Emanation. By E. RUTHERFORD, M, A., D.Sc., Macdonald Professor of Physics, and FREDERICK SODDY, B, A. (Oxon.), Demonstrator in Chemistry, McGill University, Montreal .XXX1V.-Solubilities of the Calcium Salts of the Acids of the Acetic Series. By JOHN S. LUMSDEN, D.Sc., Ph.D. . XXXV.-The Equilibrium between a Solid and its Saturated Solution at Various Temperatures. By Jorrx S. LUMSDEN, D.Sc., Ph.D. . XXXVL-Enzyme Action. By ADRIAN J. BROWN . XXXVI1.-The Velocity of Hydrolysis of Starch by Diastase, with some Remarks on Enzyme Action. By HORACE T. BROWN, LL.D., F.R.S., and T. A. GLENDINNING, F.I.C. XXXVII1.-The Union of Hydrogen and Oxygen. By H. BRERETON BAKER, M.A. , XXX1X.-Studies in the Camphane Series. Part VIII. m-Nitro benzoylcamphor. By MARTIN ONEILOW FORSTER and FRANCES M. G. MICKLETHWAIT . XL.-On the Union of Hydrogen and Chlorine. Part IV. The Draper Effect. By J. W. MELLOR and W. R. ANDERSON XLL-Condensation of Phenols with Esters of Unsaturated Acids.Part VII. By SIEGFRIED RUHEMANN , XLI1.-Mesoxalic Semi- Aldehyde. By HENRY JOHN HORST- MAN FENTON, F.R.S., and JOHN HENRY RYFFEL, B.A., B.Sc. XLIII. - The Picriminothiocarbonic Esters. By JAMES CODRINGT~N CROCKER, B.A., Scholar of St. John’s College, Cambridge. . XL1V.-Isomeric Additive Compounds of Dibenzyl Ketone and Deoxybenzoin with Benzylidene-p-toluidine, m-Nitro- benzylideneaniline, and Benzylidene-m-nitraniline. Part 111. XLV.-The Bases contained in Scottish Shale Oil. Part I. By FREDERIC CHARLES GARRETT and JOHN ARMSTRONG SMYTHE . By B. D. STEELE, B.Sc., and R. B. DENISQN, B.Sc. (1851 Exhibition Scholars) . XLVII. -Rhamnazin and Rhamnetin. By ARTHUR GEORGE PERKIN, F.R.S.E., and JOHN RAYMOND ALLISON, B.Sc. . XLVII1.-Robinin, Violaquercetin, Myrticolorin, and Osyritrin.By ARTHUR GEORGE PERKIN, F.R.S.E. By FRANCIS E. FRANCIS, B.Sc., Ph.D. XLV1.-The Transport Number of very Dilute Solutions. -21 350 363 373 388 400 406 41 4 41 9 426 436 44 1 449 456 469 473vi CONTENTS. XL1X.--The Influence of Salts and other Substances on the By EDGAR L. -The Nitration of s-Trihalogen Anilines. By K. J. P. ORTON. L1.-Some s-Chlorobronionitroanilines and their Derivatives. By LI1.-The Nitration of s-Trihalogen Acetanilides. By K. J. P. ORTON . LIII.--Prepamtion of Sdphamide from Ammonium Amido- sulphite. L1V.-The Constitution of Limettin. By W. A. TILDEN and H. BURROWS . LV.-A Method of Determining the Ratio of Distribution of a Base between Two Acids. By H. M. DAWSON and F. E. GRANT .LV1.-The Molecular Complexity of Acetic Acid in Chloroform Solution. By H. M. DAWSON . LVI1.-The Existence of Polyiodides in Nitrobenzene Solution. I. By H. M. DAWSON and R. GAWLER . LVII1.-The Slow Oxidation of Methane at Low Temperatures. By WILLIAM A. BONE and RICHARD V:WHEELER LIX.-Derivatives of a-Aminocnmphoroxime. By ARTHUR LAPWORTH and ALFRED WILLIAM HARVEY LX.-The Absorption Spectra of Metallic Nitrates. By v-ALTER NOEL HARTLEY, D.Sc., F.R.S.. . LX1.-The Resolution of Pheno-a-amin ocyclohep tane in t o its Optical Isomerides. Tartrates of Pheno-a-aminocycloheptane and of Hydrindamine. By FREDERIC S. KIPPING and ALBERT EDWARD HUNTER . LXI1.--Colouring Matter from the Flowers of Del’himhz Consolida. By ARTHUR GEORGE PERKIN, F,R.X.E., and EDWARD JOHN WILKINSON .LXII1.-Synthesis of Imino-ethers. J-Aryl Benzimino-etheys. By G. D. LANDER . LX1V.-Polymerisation Products from Diazoacetic Acid. By OSWALD SILBERRAD, Ph.D. . Annual General Meeting . Obituary Notices . LXV.-Nitrogen Chlorides containing the Propionyl Group. By F. D. CHATTAWAY . LXV1.-Dimercurammonium Nitrite and its Haloid Derivatives. By PRAFULLA CHANDRA RAY, D.Sc. (Edin.) LXVI1.-Influence of Substitution on the Reactivity of the Aromatic m-Diamines. By GILBERT THOMAS MORGAN, D.Sc*. . Vapour Pressure of Aqueous Ammonia Solution. PHILIP PERMAN * . -K. J. P. ORTON . By EDWARD DIVERS and MASATAKA OGAWA . . . . PAGE 4so 490 49 5 500 504 508 512 521 584 535 549 556 574 585 591 598 609 625 637 644 650CONTENTS. vii PAGE LXVII1.-The Influence of Certain Acidic Oxides on the Specific Rotations of Lactic Acid and Potassium Lactate.By GEORGE GERALD HENDERSON and DAVID PRENTICE, Ph.D. LX1X.-Oxonium Salts of Fluoran and its Derivatives. By J. T. HEWITT and J. N. TERVET . LXX.-Action of Hydrogen Peroxide on Carbohydrates in the Presence of Ferrous Sulphate. 111. By ROBERT SELBY MORRELL and JAMES MURRAY CROFTS . LXX1.-Preparation and Properties of 4-isoPropyldihydro- resorcin. By ARTHUR WILLIAM ,CROSSLEY . LXXII. -The Influence of Temperature on Association in Benzene Solution, and the Value of the Molecular Rise of Boiling Point €or Benzene at Different Temperatures. By WILLIAM Ross INNES, M.Sc. (Vict.), Ph.D. (Heidelberg) . LXXII1.-The Preparation of Absolute Alcohol from Strong Spirit. By SYDNEY YOUNG, D.Sc., F.R.S. .LXX1V.-The Properties of Mixtures of the Lower Alcohols with Water. By SYDNEYOUNG, D.Sc., F.R.S., and EMILY C. FORTEY, B.Sc. LXXV.-The Properties of Mixtures of the Lower Alcohols with Benzene and with Benzene and Water. By SYDNEY YOUNG, D.Sc., F.R.S., and EMILY C. FORTEY, B.Sc. . LXXV1.-Fractional Distillation as a Method of Quantitative Analysis. By SYDNEYOUNG, D.Sc., F.R.S., and EMILY C. FORTEY, B.Sc. LXXVI1.-The Vapour Pressures and Boiling Points of Mixed Liquids. Part I. By SYDNEY YOUNG, D.Sc., F.R.S. . LXXVIII. -Correction of the Boiling Points of Liquids from Observed t o Normal Pressure. By SYDNEY YOUNG, D.Sc., F.R.S. . LXX1X.-Vapour Pressures and Specific Volumes of isoPropyl isoButyrate. By SYDNEY YOUNG, D.Sc., F.R.S., and EMILY C. FORTEY, B.Sc. LXXX.-Influence of the Methyl Group on Ring Formation.By A. W. GILBODY and C, H. G. SPRANKLING LXXX1.-The Preparation of Highly Substituted Nitroamino- LXXXI1.-Nitrogen Bromides containing the Propionyl Group. By F. D. CHATTAWAY . LXXXIII. -Substit uted Dihydrobenzenes. Part I. A2:4-Di- methyldihydrobenzene. By ARTHUR WILLIAM CROSSLEY and HENRY RONDEL LN SUEUR , . benzenes. By K. J. P. ORTON . . * 658 663 666 6 75 682 70 7 717 739 752 768 777 783 787 806 814 82 1... V l l l CO NTE N TS . LXXXIV. -The Radioactivity of Thorium Compounds. 11. The Cause and Nature of Radioactivity. By E. RUTHERFORD and FREDERICK SODDY . LXXXV.-The Radioactivity of Urrtniuin. By FREDERICK SODDY . LXXXV1.-Studies in the Camphane Series. Part 1X. Com- parison of Bromonitrocamphane with Bromonitrocnmphor.By MARTIN ONBLOW FORSTER . LXXXVII.--2 : 4-Dibromo-5-nitro- and 2 : 4-Dibromo-3 : 5-di- nitrotoluenes and their Behaviour on Reduction. By WILLIABI A. DAVIS . LXXXVTI1.-Taxine. By T. E. TIIOHPE, C.B., F.R.S., and GEORGE STUBBS . LXXX1X.-The Sampling of Soils. By JOHN WALTER LEATHER. XC.-Some Excessively Saline Indian Well Waters. By JOHN WALTER LEATHER . XCL-Bromonitro-derivatives of Fluorescein. By J. T. HEWITT and ALFRED WILLIAM GEORGE WOODFORDE . X.CI1.-Studies in the Tetrahydronaphthalene Series. I. The D iazoamino-compounds of w-Te trahy dro-/3-napht halene. By CLARENCE SMITH, B.Sc., A.R. C.S. XC1II.-The Variation with Temperature of the Surface Energies and Densities of Liquid Oxygen, Nitrogen, Argon, and Carbon Monoxide. By E. C. C. BALY and F.G. DONNAN . XC1V.-Phosphorus Tetroxide. By CHARLES A. WEST, B.Sc., A.R.C.S. . XCV.-The Absorption Spectra of Phloroglucinol and some of its Derivatives. By W. w. HARTLEY, L).sc., F.R.S., JAMES J. DOBBIE, D.Sc., M.A., and ALEXANDER LAUDER, B.Sc. XCV1.-The Colour Changes exhibited by the Chlorides of Cobalt and some other Metals, from the Standpoint of the Theory of Electroaffinity. By FREDERICK G. DOHNAN and HENRY BASSETT, jun., [and, in part, C. J. J. FOX] XCVI1.-Isomeric Additive Products of Methyl, ‘ Ethyl, and Propyl Benzyl Ketones with Benzylideneaniline. Part IV. By FRANCIS E. FRANCIS, B.Sc., Ph.D., and ERNEST BOWMAN LUDLAM, B.Sc. . XC!VIII.-The Stereochemical Formulae of Benzene. By JAMES E. MARSH . XC1X.-The Action of Chlbrine and Bromine on Nitroamino- benzenes.Part I. s-Trisubstituted C hloronitroamino- benzenes. By K. J. P. ORTON . Raoult Memorial Lecture. By J. H. VAN’T HOFF, Memberof the Prussian Academy of Science, and Professor in the Univer- sity of Berlin . . . . PAGE 83 7 860 865 8’70 874 883 887 893 900 907 923 929 939 956 961 965 969CONTENTS. ix PAGE C.- Substituted Nitrogen Chlorides containing the Azo-group. By F. D. CHATTAWAY . 982 C1.-Nitrogen Chlorides and Bromides derived from Ortho- substituted Anilides. By F. D. CHATTAWAY and J. MELLO WADMORE , . 984 Dinitro- p-Anisidine and Derivatives. By RAPHAEL MELDOIA, F.R.S., and JOHN VARGAS EYRE . . 988 (2111.-Tribromophenol Bromide (Dibromobenzene Ketodibrom- ide. By EDWARD W. LEWIS (Salters’ Research Fellow) . 1001: CIV. -Some Hydroxypyrone Derivatives.By T. TICKLE (former Salters’ Company’s Research Fellow in the Research Labor- atory of the Pharmaceutical Society of Great Britain) and J. NORMAN COLLIE, F.R.S. . . 1004 CV.-Brazilin and Hzmatoxylin. Part IV. On Dimethoxy- carboxybenzoylformic Acid, Brazilinic Acid, &c. By W. H. PERKIN, jun. . 1008 CV1.-Brazilin and Hsmatoxylin. Part V. The Oxidation of Trimethylbrazilin with Chromic Acid. By A. W. GILBODY and W. H. PERKIN, jun. . . 1040 CVI1.-Brazilin and Hzmatoxylin. Part TI. The Oxidation of Tetramethylhzmatoxylin with Chromic Acid. By W. H. PERKIN, jun. . . 1057 CVII1.-The Decomposition of Chlorates. Part V. Potassium Chlornte in presence of Oxides of Manganese, and the Theory of Perchlorate Formation. By WILLIAM H. SODEAU, B.Sc. . 1066 C1X.-An Accurate Method of Measuring the Compressibilities of Vapours.By B. D. STEELE, D.Sc. (1851 Exhibition Scholar) . . 1076 CX.-The Solvent Properties of Mixed Liquids in Relation to the Chemical Characters and Solvent Properties of their Components. By HARRY MEDFORTH DAWSON . . 1086 CX1.-The Influence of Solvents on the Rotation of Optically Active Compounds. Part 111. Influence of Benzene, Toluene, 0-X ylene, m-Xylene, p-X ylene, and Mesitylene on the Rotation of Ethyl Tartrate. CXI1.-The Influence of Solvents on the Rotation of Optically Active Compounds. Part IV. Influence of Naphthalene on the Rotation of Ethyl Tartrate. CXIIL-The Decomposition of Oxalacetic Acid Phenylhydrazone in Aqueous and Acid Solutions, and a New Method of Determining the Concentration of Hydrogen Ions.By HUMPHREY OWEN JONES, B.A., B.Sc., Jacksonian Demon- strator in the University of Cambridge, and OWEN WILLANS RICHARDSON, B.A., B.Sc., Coutts Trotter Student of Trinity College, Cambridge . . 1140 CI1.-Elimination of a Nitro-group on Diazotisation. By T. S. PATTERSON . 1097 By T. S. PATTERSON . 1134X CONTENTS. PAGE CX1V.-The Dissociation Constants of Oxalacetic Acid and its Phenylhydrazone. By HUMPHREY OWEN JONES, B.A., B.Sc., Jacksonian Demonstrator in the University of Cambridge, and OWEN WILLANS RICHARDSON, B.A., B.Sc., Coutts Trotter etudent, Trinity College, Cambridge . . 1158 CXV.-Constituents of Acacia and Garnbier C'atechus. Part 1'. By ARTHUR GEORGE PERKIN, F.R.S.E., and E. YOSHITASE . 1160 CXVI.--Notes on Luteolin and Apigenin.By ARTHUR GEORGE PERKIN, F.R.S.E. . . 1174 CXVI1.-The Action of Ungerminated Barley Diastase on Starch. Part I. By JULIAN LEVETT BAKER . . 1177 CXVII1.-The Preparation of Mixed Ketones by Heating the Mixed Calcium Salts of Organic Acids, By ERNEST BOWMAN LUDLAM, B.Sc. (Vict.) . . . . , 2185 CX1X.-A Simple form of Landsberger's Apparatus for Deter- mining the Boiling Points of Solutions. By ERNEST BOWMAN LUDLAM, M.Sc. . . 1193 CXX.--The Action of Substituting Agents on Benzoneazo-P- CXX1.-The Condensation of Dimethylaminobenzaldeliyde with By JOHN THEODORE HEWITT, ALFRED JOHN CXXIL-The Action of Ethyl Chlorofumarate on Monoalkyl- CXXII1.-The Solubility of Mannitol, Picric Acid, and CXX1V.-Di-sec.-Octyl Tart rate and Di-sec.-Octyl Di benzoyl- CXXV.-Glycogen from Yeast.By ARTHUR HARDEN and w. J. YOUNG . . 1224 CXXVL-Atomic and Molecular Heats of Fusion. By P. W. ROBERTSON . 1233 CXXVI1.-Revision of the Atomic Weight of Lanthanum. By BOHUSLAV BRAUNER, Ph.D., and FRANTI~EK PAVL~~EK, Bohemian University, Prague. (Communicated by Pro- fessor Bohuslav Brauner) . 1243 CXXVIIL-The Action of Acetylene on the Acetates of Mer- cury. By EMIL BURKARD, Ph.D., and MORRIS W. TRAVERS, D.Sc. . 1270 CXX1X.-The Preparation of Pure Chlorine and its Behaviour towards Hydrogen. By J. W. MELLOR and EDWARD JOHN KUSSELL . . 1272 CXXX.-The Union of Hydrogen and Chlorine. V. The Action of Light on Chlorine Gas. . 1280 naphthol, By J. T. HEWITT and 8. J. M. AULD . . . 1202 P-Naphthol. TURNER, B.Sc., and SIDNEY WALLACE BRADLEY . . 1207 malonic Esters.By SIEGFRIED RUHEMANN . . 1212 Anthracene. By ALEXANDER FINDLAY . . 1217 tartrate. By JOHN MCCRAE , . 1221 By J. W. MELLOR .CONTENTS. x1 PACE CXXX1.-The Union of Hydrogen and Chlorine. VI. The CXXXI1.-The Decomposition of Water Vapour by the Electric Spark. By D. L. CHAPMAN and F. AUSTIN LIDBURY . . 1301 CXXXII1.-Derivatives of Dibenzoylmesitylene. By WILLIAM HOBSON MILLS, Fellow of Jesus College, Cambridge, and THOMAS HILL EASTERFIELD . CXXX1V.-The Chlorination of the Dichlorotoluenes in Presence of the Aluminium-Mercury Couple, The Constitution of the Trichlorotoluenes. Ey JULIUS B. COREN and HENRY D. DAKIN . . 1324 CXXXV.-The Constitution of the Nitro- and Dinitro-derivatives of the Dichlorotoluenes. By JULIUS €3. COHEN and HENRY D. DAKIN, The Yorkshire College .. 1344 CXXXV1.-Iodonium Compounds of the Type IR’R’”’’‘ and the Configuration of the Iodine Atom. By HAROLD PETERS, A.I.C. 1350 CXXXVI I .-T he Molec rilar Configuration of P hosphoryl Chloride and its Derivatives. By ROBERT MARTIN CAVEN, D.Sc., F.I.C. . . 1362 CXXXVIIL-Influence of Substitution on the Formation of Diazoamines and Aminoazo-Compounds. Part 11. By GILBERT THOMAS B~ORGAN, D.Sc., [and, in part, with GEORGE M. NORMAN] . . 1376 CXXX1X.-Observations on the Phenomena and Products of Decomposition when Normal Cupric Acetate is Heated. By ANDREANGEL, B.A., Dixon Scholar, and A. VERNON HARCOURT, M.A., F.R.S., Lee’s Reader in Chemistry, of Christ Church, Oxford . . 1385 CXL. -The Resolution of P-Hydroxybntyric Acid into its Optically Active Components.By ALEX. MCKENZIE . 1402 CXLI. -The Rate of Decomposition of Diazo-compounds. Part I. Diazo-compounds of the Benzene Series. By JOHN UANNELL CAIN and FRANK NICOLL . . 1412 CXLI1.-Studies of the Terpenes and Allied Compounds. Sulphonic Derivatives of Camphor. I. Camphorsulphonic Acid (Reychler) : the Formation of Anhydramides. HENRY E. ARMSTRONG and T. MARTIN LOWRY The Sulphonation of Camphor. 11. P-Bromocamphor and its Derivatives. P-Bromocamphoric Acid. By HENRY E. ARMSTRONG and T. MARTIN LOWRY . . 1462 The Sulphonation of Camphor. 111. The Optical Inversion of Camphor and the Mechanism of Hetero- and Meso-sulphon- ation, of Homo- and Hetero-bromination, and of Dehydr- ation. Period of Induction. By J. W. MELLOR . . 1292 . 1311 . ’ y 1441 . CXLIIL-Studies of the Terpenes and Allied Compounds.CXL1V.-Studies of the Terpenes and Allied Compounds. By HENRY E. ARMSTRONG and T. MARTIN LOWRY . 1469xii CONTENTS. PAG1 CXLV.-The Action of Nitric Acid on’ Bromophenolic Com- CXLV1.-Derivati ves of Normal- and iso-Butyrylpyruvic Acids. By ARTHUR LAFWORTR and A. C. OSBORN HANN . CXLVIL--Optically Active Esters of /I-Ketonic and /I-Aldehydic Acids. Part I. Menthyl Formylphenylacetate. By ARTHUR LAPWORTH and A. C. OSBORN HANN . . 1491 CXLVII1.-Optically Active Esters of @Ketonic and /I-Alde- hydic Acids. Part 11. Menthyl Acetoacetate. By A. LAPWORTH and A. C. OSBORN HANN . * 1495 UXL1X.-The Mutarotation of Camphorquinonehydrazone and Mechanism of Simple Desmotropic Change. By ARTHUR LAPWORTH and A. C. OSBORN HANN . . 150E CL. --The Action of Sodamide and Acyl-substituted Sodamides on Organic Esters. By ARTHUR WALSH TITHERLEY, D.Sc., PkD. . 152C CL1.-3 : 5-Dichloro-o-xylene and 3 : 5-Dichloro-o-phthalic Acid. By ARTHUR WILLIAM CROSSLEY and HENRY RONDEL LE SUEUR . . 1533 CLI1.--Non-existence of the Gaseous Sulphide of Carbon described by Deninger. By EDWARD JOHN RUSSELL and NORMAS SMITH . . 1538 CLII1.-Note on the Localisation of Phosphates in the Sugar CL1V.--Isometric Anhydrous Sulphates of the Form M”S0,,R’2S0,. By FREDERIC R. MALLET . . 1546 CLV.-Asymmetric Optically Active Selenium Compounds and the Sexavalency of Selenium and Sulphur. d- and I-Phenyl- methylselenetine Salts. By WILLIAM JACKSON POPE, F.R.S., and ALLEN NEVILLE, B.Sc. CLV1.--Hydroxyoxamides. Part 11. By ROBERT HOWSON PICKABD, CHARLES ALLEN, WILLIAM AUDLEY BOWDLER and WILLIAM CARTER . . 1563 CLVI1.--The Constituents of Commercial Chrysarobin. By HOOFER ALBERT DICKINSON JOWETT and CHARLES ETTY POTTER . 1575 CLVII1.-The Constituents of an Essential Oil of Rue. By FREDERICK B. POWER and FREDERIC H. LEES . . 1586 CL1X.-Methyl /3-Methylhexyl Ketone. By FREDERIC HERBERT LEES . . 1594 CLX.--The Constitution of the Metallic Cyanides as Deduced from their Synthetic Interactions. The Constitution of Hydrogen Cyanide. By JOHN WADE, D.Sc. . 1596 pounds. By WILLIAM ROBERTSON, A.R.C.S. . 147! . 148: Cane. By CHAS. HENRY GRAHAM SP~~ANKLINU . . 1543 . 1552