Notice relative to the form of the Blood.particles of the Ornitharhgnchus hystriz. By John Davy, M.D. page 232
Researches on Electra—chemical equivalents, and on a. supposed dis- crepancy between some of them and the atomic weight of the same
bodies, as deduced from the theory of isomorphism. By Lieut.- Colonel P. Yorke .. . 232
Second series of Apprommate Deductions made from about 50,000 observations taken during the years 1836, 1837, and 1838, at the P. Louis Observatory, Mauritius, {our times each day; namely, at 8 11.14., at noon, and at 4 and 8 P.M. By J. A. Lloyd, Esq. F.R.S. 232
On the Solubility of Silica by Steam ; with an account of an experi- ment on the subject, conducted in the East Indies, by Julius Jef- freys, late of the Hon. East India Company’s Medical Establishment 233
Contributions to the Chemical History of Archil and of Litmus. By Robert Kane, M.D. M.R.I.A. .. 233
On the Corpuscles of the Blood. By Martin Barry, M.D. F.R.S. .. 234
Letter from G. G. Anson, Esq. addressed to the President, enclosing a specimen of a deposit with which nine acres of land near Exeter, belonging to Lord Radnor, had been covered after the subsidence of a flood, and which was sent by H.R.H. Prince Albert, 238
Description of the Specimen referred to in the preceding letter. By John Lindley, Ph. D. F.R.S ................... 238
An Account of Experiments on the Reflecting Telescope. By the Right Hon. Lord Oxmantown,
On the theoretical explanation of an apparently new Polarity in Light. By G. B. Airy, Esq. M.A. F.R.S. Astronomer Royal 239
On the Ferrosesquicyanuret of Potassium. By Alfred Smee, Esq. 239
On the influence of Iodine in rendering several argentine compounds, spread on paper, sensitive to light -, and on a new Method of pro-
ducing, with greater distinctness, the Photogenic Image. By Mr. Robezt Hunt ........................................ 239
Hourly Observations of the Barometer and Thermometer at sea, on the 2lst ofMarch, 1840. By Major—GeneralA. Lindsay, H.E.I.C.S. 239
On the Constitution of Pigotite, and on the Mudesous and Mudesic Acids. By James F. W. Johnston Esq. F.R.S ........ .......... .. 239
On the Constitution of the Resins—Part V. By James F. W. Johnston, Esq. M.A. .. 241
Researches on the Tides.—Twelfth Series. On the Laws of the Rise and Fall of the Sea’s surface during each tide. By the Rev. W. \Nhewell, B.D. F.R.S. Fellow of Trinity College, Cambridge 242
Researches in Embryology. Third Saies Additional Observations. By Martin Barry, M.D. F.R.S. 243
Description of a. Calculating Machine invented by Mr. Thomas Fow- ler, of Torrington in Devonshire. By Augustus De hiorgan, Esq. 243
On the Minute Structure and Movements of Voluntary Muscles, in a letter addressed to R. B. Todd, M.D. F.R.S. 8m. By “William Bowman, Esq. Demonstrator of Anatomy in King's College, Lon- don, and Assistant Surgeon to King’s College Hospital .......... 244
Supplement to a. paper ‘On the Theroetical Explanations of an appas
