January 23, 1879. I. Researches on Chemical Equivalence. Part I. Sodic and Potassic Sul- phates. By EDMUND J. MILLS, D.Sc., F.R.S., " Young" Professor of Technical Chemistry in Anderson's College, Glasgow, and T. U. 268 II. Researches on Chemical Equivalence. Part II. Hydric Chloride and Sulphate. By EDMUND J. MILIS, D.Sc., F.R.S., and JAMES HOGARTH 270 III. Researches on Lactin. By EDMUND J. MILLS, D.Sc., F.R.S., " Young" . 273 IV. On the Microrheometer. By J. B. HANNAY, F.R.S.E., F.C.S., lately Assistant Lecturer on Chemistry in Owens College, Manchester . 279 V. Limestone as an Index of Geological Time. By T. MELLARD READE, I. On the Effect of Heat on the Di-iodide of Mercury, HgI. By G. F. RODWELL, Science Master, and H. M. ELDER, a Pupil, in Marlborough II. A Comparison of the Variations of the Diurnal Range of Magnetic Declination as recorded at the Observatories of Kew and Trevandrum. By BALFOUR STEWART, F.R.S., Professor of Natural Philosophy in Owens College, Manchester, and MORISABRO HIRAOKA III. On the Determination of the Rate of Vibration of Tuning Forks. By HERBERT MCLEOD, F.C.S., and GEORGE SYDENHAM CLARKE, IV. On certain means of Measuring and Regulating Electric Currents. By . Part I (1878), price £1 16s., ready for delivery. Separate copies of Papers in the Philosophical Transactions, commencing with 1875, THE ROYAL SOCIETY. VOL. XXVIII. CONTENTS. No. 193. February 6, 1879. I. On certain Dimensional Properties of Matter in the Gaseous State. Part I. Experimental Researches on Thermal Transpiration of Gases through Porous Plates, and on the Laws of Transpiration and Impulsion, including an Experimental Proof that Gas is not a Continuous Plenum. Part II. On an Extension of the Dynamical Theory of Gas which includes the Stresses, Tangential and Normal, caused by a Varying Condition of the Gas, and affords an explanation of the Phenomena of Transpiration and Impulsion. By OSBORNE REYNOLDS, F.R.S., Professor of Engineering at Owens College, Manchester PAGE 304 II. Absorption of Gases by Charcoal. Part II. On a new Series of Equivalents or Molecules. By R. ANGUS SMITH, Ph.D., F.R.S. . 322 February 13, 1879. I. Note on the Development of the Olfactory Nerve and Olfactory Organ of Vertebrates. By A. MILNES MARSHALL, M.A., D.Sc., Fellow of St. II. On the Development of the Skull and its Nerves in the Green Turtle (Chelone midas), with Remarks on the Segmentation seen in the Skull of various types. By Professor W. K. PARKER, F.R.S. III. On an Extension of the Phenomena discovered by Dr. Kerr and described by him under the title of "A New Relation between Electricity and Light." By J. E. H. GORDON, B.A., Assistant Sec. of the British Asso For continuation of Contents see 4th page of the Wrapper. 324 . 329 346 Price Three Shillings. Reports, &c. (continued). Rome: Triplice Omaggio alla Santità di Papa Pio IX, nel suo giubileo episcopale offerto dalle tre Romane Accademie Pontificia di Archeologia, Insigne delle Belle Arti, Pontificia de' Nuovi Lincei. Scienze. 4to. Roma 1877. The Accademia Pontificia de' Nuovi Lincei. Arya Bhatta. The Elements of Plane Geometry in 48 propositions, The Author. The Author. Mourek (V. E.) A Dictionary of the English and Bohemian Languages. 12mo. Prague 1879. A Treatise on Roscoe (H. E.), F.R.S., and C. Schorlemmer, F.R.S. The Authors. February 6, 1879. W. SPOTTISWOODE, M.A., D.C.L., President, in the Chair. The Presents received were laid on the table, and thanks ordered for them. The following Papers were read : VOL. XXVIII. N |