CONTENTS 



OF THE 



TWENTY-EIGHTH VOLUME. 



I. The Bakerian Lecftire. on some Chemical Jlgencies of 

 Ehctricitij. B// Humphry Daw, Esq. F. R. S. 

 M. R.I.J. ..3 



II. On the Hindoo For mules for cornpnting Eclipses, 

 Tables of Sines, and various Astronomical Problems. 

 By M". Delambre 13 



II r. Problems on the Reduction of Angles. By T. S. 

 Evans, F.L.S., of the Royal Military Acadeyny, IFool- 

 ii'ich 25 



IV. On the Formation of the Bark of Trees. In a Letter 

 from T. A. Knight, Esq. F. R. S. to the Right Hono7/r- 



ot/e Sir Joseph Banks, K.B. P. R. S. <5#c. .. 33 



V. Observations upon the crystallized Bodies contained in 

 Lava. By M. G. A. Dk Luc 43 



VJ. Account of some additional Experiments made by the 

 Galvaiiic Society of Paris. Co)nmunicated by M. Rif- 



FAULT .'J5 



VII. Account of an Experiment made by the Galvanic So- 

 ciety of Paris, upon the Formation of the Orymuriatic 

 Acid, and the Separation of Soda from the Muriate qfSoda, 

 by means of the Pile of Folta. Cojnmunicated on the ! .'j'/i 

 of Dec. 180G, to the Galvanic Society of iha French Na- 

 tional Inslitute. By M. Choupre 59 



VIII. On a new Mode of equally Tempering the Musical 

 Scale. % A/r. John Fahev ., G5 



IX. Bcscriplion of the Opligraph {invented by the late 

 Mr. Kamsden) as improved and made by jV//-. Thomas 

 .loNES, Mathematical, Optical, and Philo<!Ophiral Instru- 

 ment Maker, No. 124, Mount- street, Berkley- square 63 



X. History of yhtronomy for the Year 1806. By Jerome 

 DE Lalande Q9 



XI. Notices reipecthify Nt to Books 79 



XII. Proceedings (f Learned Societies By 



XIII. IiiteUigence and Miscellaneous Articles .. .. 92 



XIV. Theory of Galvanic Electricity, fi'ivled on Expe- 

 rience. By M. I. A. H KIDMAN, Physician in Vienna. 

 Abridged ty M. Guvton • • 91 



Vol.28. No. 112. Sept. 1807. a ^V. The 



