Vol. 34. 



PhilosopKical Magazine. 



July 1809, 



CONTENTS of NUMBER CXXXV. 



Page\ 



I. On Deal Pendulum Rods. By Mr. E. Walker - 3 



II. The Eakerian Lecture. An Account of some new 

 ^ analytical Researches on the Nature of certain Bodic-s, parti- 

 cularly the Alkalies. Phosphorus, Sulphur, Carbonaceous 

 Matter, and the Acids hitherto undecomposed ; with some 



[general Ob^e^vations on Chemical Theory. By Humphry 

 'Davy, Esq., Sec. R.S., F.R.S. Edin.,and M.R.I.A. 



III. An Inquiry into the Terrestrial Phaenomena produced 

 1 by the Action of the Ocean. By John Caur, Esq,, of Man- 



^^^ Chester. — No. I. - . . - . 



IV. An Account of some Experiments, performed with a 

 View to ascertain the most- advantageous Method of construct- 



,ing a Voltaic Apparatus, for the Purposes of Chemical Re- 

 isearch. By JoHv George Children, Esq., F.R.S. 



V. On the Origin and Formation of Roots. In a Letter 

 |from T. A. Knight, Esq., F.R.S., to the Right Hon. Sir 

 'Joseph Banks, K.B., P.R.S. 



VI. Analysis of the Mec.inique Celeste of M. La Place, 

 Member of the French Institute, &c. By M. Biot 



VII. Account of the Dissection of a Human Fcetus, in 

 /which the Circulation of the Blood wafi carried on without a 



Heart. By Mr. B. C. Brodie. Communicated by Everakd 

 iHoME, Esq., F.R.S. - - - . . 



VII r. Geological Observations on the Excavations of 

 J'^^^^ Valleys, the supposed Existence of numerous Lakes at former 

 I'jl Periods where Valleys now exist, which tlie Streams flowing 

 through them are said to have broken down, &c.: in Reply to 

 [Mr. John Carr's Letter in the last Number, p. 452. By 

 'Mr. John Fakey - - - - - 49 



IX. A numerical Table of elective Attractions; with Re- 

 Imarks on the Sequences of double Decompositions. By 



Thomas Young, M.D. For. Sec. R.S. - - ^^ 



X. On Ctysfallography. By M. Hauy. Translated from 

 ' the last Paris Edition of his Traitc de Mmhalogie - 64 



XI. Proceedings of Learned tiocielics - - 70 



XII. Intelligence and Miscellaneous Articles— Meteoro- 

 logical Table _ . . - . y~ — go 



-»# 



26 j 



31 



36 



43 



*^* Communicalions for this Work, addressed to the Editor, at 

 [No. I, Carey-street, Lincoln's Inn, will meet with every attention 



TAYLOR AOO t.O. FHINTERg, 9H0S LANe» FLEET STJtECT, LO.NSOX 





