CONTENTS. v 



OCTOBER, 1809. 



Engravings of the following Subjects: 1. The Sting of the Nettle, highly magni- 

 fied, in its natural State, emitting its Poison, and when broken : 2. The Awn 

 of the Indian Grass, used in Captain Rater's Hygrometer: 3. The Leaf and 

 Stem of the Sensitive Plant, showing their Structure: 4. The Spiral Wire and 

 its Case greatly magnified. 



I. Farther Application of a Series to the Correction of th e Height of the Ba- 

 rometer - - - • - - 81 



II. On the Action of the Metal of Potash on Metallic Salts and Oxides, and on 

 Alkaline and Earthy Salts. By Messrs. Thenard and Gay-Lussac. 92 



III. The Bakerian Lecture. An Account of some new analytical Researches on 

 the Nature ot certain Bodies, &c. By Humphry Davy, Esq. Sec. R. S. 

 F. R. S. Ed. and M. R. LA. - - - - 95 



IV. Extract of a Letter from Mr. J. B. van Mons, Member of the Institutes of 

 France and Holland, to the Editor, on Atmospheric Phenomena - 106 



V. Remaining Proof of the Cause of Motion in Plants explained ; and what is 

 called the Sleep of Plants shown to be Relaxation only. By Mrs. Agnes 

 Ibbetson. - -.- - - -114 



VI. A curious Property of Single Repetends. In a Letter from W. Saint, Esq. 



124 



VII. On the Use of Iron for Stairs, and instead of the Timbers of Houses, as a 

 Security against Fire. In a Letter from Mr. Benjamin Cook. - 126 



VIII. On Respiration. By Mr. J. Acton. In a Letter from the Author 130 



IX. On the Camera Lucida. In a Letter from Mr. R. B. Bate - 146 



X. Account of some Experiments performed wilii a View to ascertain the most 

 advantageous Method of constructing a Voltaic Apparatus, for tbe Purposes 

 of Chemical Research. By John George Children* Esq. F. R. S. 150 



XI. Report of a Memoir of Mr. Hassenfratz respecting the Alterations that the 

 Light of the Sim undergoes in traversing the Atmosphere. By Mr. Hauy. 



155 



Scientific News - - - - -158 



Meteorological Table - * - - - 160 



NOVEMBER, 



