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MARCH, 1811.

Engravings of the following Subjects: 1. Diagrams to illustrate the Motion of
Rockets, by W. Moore, Esq. 2. Dissections of the Petals of various Flowers,
showing the Structure from which the Beauty of their Colour arises, by Mrs.
A. Ibbetson. 3. Parts of the Corollas of different Flowers delineated from Na-
ture, by the same Lady.

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APRIL, 1811.

Engravings of the following Subjects: 1. Two new Constructions of the Air Pump. 2. Dissections of Plants, showing the Growth of the Bud, by Mrs. A. Ibbetson.

I. Observations and Experiments on the Alkaline Metalloids: by J. Murray, Lecturer on Chemistry, &c., Edinburgh 241 II. Cheap and simple Construction of an Air Pump. In a Letter from a Correspondent

HI. On the Interior of Plants. Letter I. By Mrs. Agnes Ibbetson

241

254

IV. Observations on the Oxides of Iron, with a Discussion of their Nature, By Mr. J. H. Hassenfratz 266

V. On the Parts of Trees primarily impaired by Age. In a Letter from T. A. Knight, Esq. F. R. S. to the Right Hon. Sir Joseph Banks, Bart. K. B. P. R. S.

275

VI. Remarks on Mr. Dalton's Hypothesis of the Manner in which Bodies combine with each other. In a Letter from John Bostock, M. D. 280 VII. Effect of Changes in the State of the Atmosphere on Mr. De Luc's Electríc Column. Communicated by Thomas Forster, Esq.

293

VIII. On the Nature of Oximuriatic Acid, in Reply to Mr. J. Davy. By J. Murray, Lecturer on Chemistry, Edinburgh 294 IX. On the Production of the Hyperoximuriate of Potash, considered with respect to Mr. Davy's Ideas of the Nature of Oximuriatic Acid. In a Letter from a Correspondent

310

X. Observations respecting the Irritability of the Barberry, Berberis communis. By Mr. Robert Lyall, Surgeon, Member of the Royal Physical Society of Edinburgh, and corresponding Member of the Literary and Philosophical Society at Manchester. Communicated by the Author

314

XI. Extract of a Letter from the Rev. John Brinckley, D. D. F. R. S. Andrews Professor of Astronomy in the University of Dublin, to the Rev. Nevil Maskelyne, D. D. F. R. S. Astronomer Royal, on the annual Parallax of a Lyre

Scientific News.

Meteorological Journal

317

ibid.

320

SUPPLEMENT

SUPPLEMENT TO VOL. XXVIII.

Engravings of the following Subjects: 1. Dissections of Plants to illustrate the Growth of the Bud, by Mrs. Agnes Ibbetson. 2. A Machine for evaporating Liquids without Heat, by the late Mr. Joseph Montgolfier.

1. On the Gaseous Combinations of Hidrogen and Carbon. By Thomas Thomson, M. D. F. R. S. E.

321

II. On a new Compound resulting from the Union of Benzoic Acid with Camphor. In a Letter from F. R. Gowar, Esq.

336

III. Comparative Analysis of Gum-Resins: by Mr. Henry Braconnot, Professor of Natural History, &c.

344

IV. On the Mechanism of Respiration in Fishes: By Mr. C. Duméril, Professor at the Medical School, &c.

350

V. Farther Experiments on the alkaline Strength of the Product of the Oxigenation of Potassium, with Observations on the Nature of the alkaline Metalloids : By J. Murray, Lecturer on Chemistry, Edinburgh.

359

VI. On the Affinity of Muriatic Acid for different Bodies, considered with Regard to Mr. Davy's Ideas of its Nature. In a Letter from a Corres pondent.

369

VII. Description of an economical Process for Evaporation, invented by the late Mr. Joseph Montgolfier: by Messrs. Desormes and Clément

Scientific News.

373

379

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Nicholson's Philos. Journal, Vol. XXVII. Pl. 1 pl

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M.De Luis Machine for producing small quantities of Electricity.

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