CONTENTS. 



FEBRUARY, 1810. 



Engravings of the following Subjects: 1. Figs. 2 and 3, of Mn TrougUton's 

 Apparatus for dividing Astronomical Instriunents: 2. Diagrams illusti-atiivg 

 the Art of Aerial Navigation; by Sir Geo. Cayley, Bart. 3. Leaf of the 

 Mimosa Pudica; by Mr. Robert Lyall. 



I. On Aerial Navigation. By Sir George Cay ley, Bart. - - 81 



II. Farther Remarks on Respiration, in Answer to J. F. By Mr. Acton 88 



III. On the Dioncca Muscipiila. Read at the Literary and Philosophical Soci- 

 ety of Manchester, Oct. 6th, by Mr. Robert Lyall. Communicated by the 

 Author ...... 92 



IV. Questions on the Study of the Mosses. In a Letter from a Correspondent 



m 



V. Analysis of the compact Red Iron Ore in cubic Crystals from Toeschnitz in 

 Thuringia. By Mr. Bucholz - - - - 97 



VI. Extract of a Letter from Mr. Courtelle, Subinspector at Reviews, to Mr. 

 Guyton-Morveau, on the Parabolic Lens of Rpspini, purchased at Vienna for 

 the French Government - - • - Qi^ 



VII. An Account of a Method of dividing Astronomical and other Listrumenlsv 

 &c. By Mr. Edward Troughton - - - - lOO 



VIII. On the Origin and Formation of Roots. In a Letter from T. A. Knight, 

 Esq. F. R. S. to the Rt. Hon. Sir Joseph Banks, K. B. P. R. S. 118 



IX. Inquiries into the Limits of Single Vision, and the corresponding Points in 

 the Relina, &c. By Dr. Haldat, Secretary to the Academy of Nancy 122 



X. New analytical Researches on the Nature of certain Bodies, being an Ap- 

 pendix to the Bakerian Lecture for 1808. By Humphry Daw, Esq. Sec. 

 R.S, Prof. C hem. R.I. - - .' ' . 135 



XI. Notes to Dr. Henry's Paper on Ammonia. By the Author. Communi- 

 cated in a Letter to the Editor - - - - 152 



XII. Observations on Acetic Acid. By J. B. Mollerat - - lj5 



XIII. Extract of a Letter from Mr. W. Maclure, Member of the Philosophical 

 Society of Philadelphia, to J. C. Delametherie, on the Volcanoes of Allot in 

 Catalonia - - - - - - 138 



XIV. An Iris seen in the Dew, and a Lunar Iris. By a Correspondent 159 

 Meteorological Table - - - - • 160 



MARCIL 



