SECTION III. CHEMISTRY AND PHOTOGRAPHY. LONDON. CHEMICAL SOCIETY, BURLINGTON HOUSE, PICCADILLY. Officers.-President: Prof. T. E. Reynolds, D.Sc., F.R.S. Secretaries: W. R. Assistant-Secretary: Meetings. First and third Thursdays in each month at 8 P.M., from November to June inclusive. The Anniversary Meeting takes place March 27th. Membership.-Entrance Fee, £4; Annual Subscription, £2; Life Composition, £30. Publications during 1900.-Proceedings, 7s. 6d.; Transactions, 40s.; General Index to Society's Publications, 1873–92. Papers communicated from January 1900 to June 1901. Abstracts of all appear in the "Proceedings." Benzeneorthodisulphonic June 21, 1900. Acid. and L. P. Wilson.-1: 2: 4Metaxylidine - 6 - Sulphonic Acid. Dec. 20, 1900. Aston, B. C. See Easterfield, T. H., and Hewitt, J. T. Abell, R. D., B.Sc.-The Condensa- | Armstrong, H. E., and S. S. Napper. -tion of Ethylphenylketone with Benzaldehyde. May 16, 1901. Ackroyd, W.-Researches on Moorland Waters. II.-On the Origin of the Combined Chlorine. Apr. 18, 1901. Adie, R. H., M.A., and T. B. Wood, M.A.-The Volumetric Estimation of Potassium. Feb. 1, 1901. Allison, J. R. See Perkin, A. G. Arbuckle, W. See Scott, A. Armstrong, H. E.-Note on Bach's Hydrogen Tetroxide. May 17, 1900. Phenylacetyl Chloramine and Analogous Compounds. June 21, 1900. and W. Berry.-Metasulphonation of Aniline. June 21, 1900. and P.C. C. Isherwood.-Bromination of Oxyazo-compounds. June 21, 1900. and E. W. Lewis.--Inhibiting Effect of Etherification on Substitution in Phenols. June 21, 1900. and T. M. Lowry.-Stereoisomeric a- and á-Sulphonic Derivatives of Camphor. June 20, 1901. Aston, F. W. See Frankland, P. F. 1900. Baker, J. L., and T. H. Pope.-Manno- Beddow, F. See Ruhemann, S. CHEMICAL SOCIETY-continued. Bone, W. A., and D. S. Jordan.-The | Chattaway, F. D., and K. J. P. Orton. Note on Neodymium. Mar. 21, 1900. On the Atomic Weight of Praseodymium. Mar. 21, 1901. Ön Praseodymium Tetroxide and Peroxide. Mar. 21, 1900. and F. Pavliček.-On the Atomic Weight of Lanthanum and on the Error of the Sulphate Method, for the Determination of the "Equivalent" of the Rare Earths. Mar. 21, 1901. Brown, H. See Dunstan, W. R. Derivatives of Ethyl, α- on Ortho Substituted Nitrogen Chlorides and Bromides, and the Entrance of Halogen into the Ortho Positions in the Transformation of Nitrogen Chlorides. May 17, 1900. Preparation of Acetylchloraminobenzene and Related Compounds. Dec. 20, 1900. Preparation of Orthochloroaniline. Replacement of Bromine by Chlorine in Anilines. May 16, 1901. Substituted Nitrogen Chlorides and Nitrogen Bromides derived from Ortho- and Para-AcetToluide. May 3, 1900. Sym Trichlorobromoanilines and Chloro- and BromoaminoDerivatives of Chlorobromoacetanilides. May 16, 1901. and Hurtley, W. H.-Nitrogen Chlorides derivable from Meta-Chloroacetanilide and their Transformations. May 17, 1900. Clarke, G. See Kipping, F. S. Cohen, J. B., and H. B. Dakin.--The Aluminium-Mercury Couple. III. Chlorination of Aromatic Hydrocarbons in Presence of the Couple. The Constitution of the Dichlorotoluenes. Apr. 18, 1901. Collie, J. N., Ph.D. Dehydracetic Acid. June 21, 1900. On the Decomposition of Carbon Dioxide, when submitted to Electric Discharge at Low Pressures. June 20, 1901. and B. D. Steele, M.Sc. - On Dimethyldiacetylacetone, Tetramethylpyrone and Orcinol Derivatives from Diacetylacetone. June 21, 1900. On some Periodides of Substituted Oxonium Derivatives. See Garsed, W. Cormack, W.-The Estimation of Furfural. June 21, 1900. See Walker, J. Craven, R. M., B.Sc.-Organic Derivatives of Phosphoryl Chloride, and the Space Configuration of the Valencies of Phosphorus. Feb. 7, 1901. Crofts, J. M. See Morrell, P. S. Cross, C. F., and E. J. Bevan.-The 1900. Interaction and Ethyl Apr. 5, CHEMICAL SOCIETY-continued. Dakin, H. D. See Cohen, J. B. Dawson, H. M.-On the Nature of Polyiodides and their Dissociation in Aqueous Solutions. Dec. 6, 1900. and J. M'Crae.-On the Nature of Metal-Ammonia Compounds in Aqueous Solution. Metal-Ammonia Compounds in Aqueous Solution. II. The Absorptive Powers of Dilute Solutions of Salts of the Alkali Metals. Jan. 17, 1901. III.-Solutions of Salts of the Alkaline Earth Metals. June 20, 1901. IV. The Influence of Temperature on the Dissociation of Cupri-Ammonia Sulphate. June 20, 1901. Dickinson, C. See Patterson, T. S. Divers, E. - The Colour of Alkali Nitrites. Feb. 15, 1900. Products of the Action of Sulphur Dioxide on Ammonia. May 3, Dixon, A. E., M. A.-Interaction of See also Hartley, W. N. See also Sell, W. J. Doran, R. E.-The Action of Lead Thiocyanate on the Chlorocarbonates. II. Carboxymethyl- and Carboxyamyl-Thiocarbimides and their Derivatives. May 16, 1901.Dowyard, E.-A Modification of Yutzeit's Test for Arsenic. Apr. 18, 1901. Drugman, J., Ph.D., and W. Ramsay, F.R.S.-The Specific Gravities of the Halogens at their Boiling Points, and of Oxygen and Nitrogen. Vac. Dunstan, W. R., F.R.S., and H. Brown: -The Alkaloids of Hyoscyamus muticus and of Datura Stramonium grown in Egypt. Dec. 6, 1900. and E. Goulding, B.Sc.-Action of Alkalis on Nitro-Compounds of the Paraffin Series. II.-The Reactions and Constitution of Methazonic Acid, and the Formation of Isoxazoles. Nov. 1, 1900. Action of Alkyl Haloids on Aldoximes and Ketoximes, Alkylated Oximes and Isoximes, and the Constitution of Aliphatic Oximes. Apr. 18, 1901. The Supposed Existence of two Isomeric Triethyloxamines. Apr. 18, 1901. Easterfield, T. H., and B. C. Aston.Tutu. Part I. Dec. 6, 1900. Eynon, L. See Meldola, R. Eyre, W. See Young, G. Farmer, R. C., Ph.D.-A New Method for the Determination of Hydrolytic Dissociation. May 16, of and P. J. Hartog.-The Heat of Formation and Constitution Iron Nitride. Dec. 6, 1900. Fox, J. J. See Hewitt, J. T. Francis, F. E., Ph.D. Isomeric Dibenzylketone Benzalanilines and Deoxybenzoin benzalanilines. Frankland, P. F., and F. W. Aston. -Influence of a Heterocyclic Group on Optical Rotation; the Ethyl and Methyl Salts of Dipyromucyltartaric Acid. Feb. 21, 1901. F. M. Wharton, and H. Aston.The Amide, Anilide, and Toluidides (ortho- and para-) of Glyceric Acid. Jan. 17, 1901. Gardner, J. A.-Note on the Bromoderivatives of Camphopyric Acid. Feb. 15, 1900. Garrett, F. C., M.Sc., and J. A. Smythe, B.Sc. The Basis contained in Scottish Shale Oil. Nov. 15, 1900. Garsed, W., and J. N. Collie, F.R.S.On the Estimation of Cocaine and on Di-iodo-cocaine Hydriodide. Apr. 18, 1901. Gilbody, A. W., and C. H. G. Sprank ling. The Influence of the Methyl and J. H. Lindfield.-The Nitration of the Three Tolueneazophenols. Dec. 6, 1900. and B. W. Perkins.-Contributions to the Knowledge of Fluorescent Substances. I.-The nitro Derivatives of Fluorescein. Nov. 1, 1900. and H. A. Phillips.-The Bromination of the Ortho-oxyazo Compounds and its Bearing on their Constitution. Dec. 20, 1900. and J. N. Tervet. - Action of Bromine on the Three Toluene Azophenols. June 20, 1901. Hibbert, H. Sec Millington, J. P. Hill, A. C., M.A.-A Method of Isolating Maltose when mixed with Glucose. Mar. 7, 1901. Taka-diastase and Reversed Ferment Action. June 20, 1901. Horsfall, L. H. See Perkin, A. G. Howles, F. H., J. F. Thorpe, and W. Udall.-B-Isopropylglutaric Acid and the cis- and trans-methylisopropylglutaric Acid. May 17, 1900. Hunter, A. E. See Kipping, F. S. Hurtley, W. H. See Chattaway, F. D. Innes, W. R.-On the use of Pyridine for Molecular Weight Determinations by the Ebullioscopic Method. Dec. 20, 1900. Irvine, J. C., B.Sc.-Preparation of Orthodimethoxybenzoin, and a New Method of preparing Salicylaldehyde Methyl Ether. Apr. 18, 1901. Isherwood, P. C. C. See Armstrong, H. E. Japp, J. R., F.R.S., and W. Maitland, B.Sc.-Formation of Carbazoles: a Preliminary Note. June 20, 1901. and A. N. Meldrum, B.Sc. Homologues of Anhydracetonebenzil. June 20, 1901. Japp, J. R., F.R.S., and A. C. Mitchie, B.Sc.-Reduction of ay-Dibenzoyl propane and Dibenzoyldiphenylbutadiene. June 20, 1901. and J. Moir, M. A.-Isoamarine. Feb. 13, 1900. Jerdan, D. S. See Bone, A. W. Jollyman, W. H. See Pakes, W. C. C. Jones, H. O. See Fenton, H. J. H. Jowett, H. A. D., D.Sc. - A new Glucoside from Willow Bark. Apr. 5, 1900. The Constitution of Pilocarpine. May 17, 1900. The Constitution of Pilocarpine. Part II. Mar. 21, 1901. On Pilocarpine and the Alkaloids of Jaborandi Leaves. Mar. 1, 1900. Kinch, E.-The Amount of Rain-water collected at Cirencester. Nov. 1, 1900. Kipping, F. S., F.R.S.-Experiments on the Production of Optically Active Compounds from Inactive Substances. Dec. 20, 1900. Isomeric Hydrindamine CamphorT-Sulphonates. Racemisation of a-Bromocamphor. Feb. 17, 1901. Isometric partially Racemic Salts containing Quinquevalent Nitrogen. Hydrindamine Bromocamphorsulphonates, Chlorocamphorsulphonates and cis-T-camphanates. Mar. 1, 1900. Note on the Decomposition of Semicarbazones. Mar. 1, 1900. and G. Clarke. — a-amido-Bmethylhydrindene. June 20, 1901. and H. Hall.-Isomeric Hydrindamine Mandelates and Phenylchloroacethydrindamides. Feb. 21, 1901. Isomeric Benzylhydrin damine Bromocamphorsulphonates, and some Salts of d-l-hydrindamine. Feb. 21, 1901. New Syntheses of Indene. Mar. 1, 1900. and A. E. Hunter.-Pheno-a-ketoheptamethylene and its Derivatives. Mar. 21, 1901. and L. L. Lloyd.-Organic Derivatives of Silicon. Feb. 17, 1901. and H. Peters.-Iodonium Compounds of the type IR'R"R" and the Configuration of the Iodine Atom. Mar. 1, 1900. Lander, G. D., D.Sc.-Action of Dry Silver Oxide and Ethyl Iodide on |