CONTENTS. 



Determination of the Altitude of Great fVhernside : with Re- 

 marks on terrestrial Refraction. By A Correspondent 



209 



Supplementary Table for computing the Precession and Nu^ 



lotion of the Fixed Stars. By Francis Baily, Esq. 



F.R.S.andL.S 217 



Strictures on Dr. Young's and La Place'' s Theories of the 

 Tides. In a Letter to Dr. Young. By Capt. For man, 



R.J^f. ..(.... 219 



On Electro-Magnetism. By Mr. J. Tatvm . . . 241 

 Queries relative to the Mode of using M. Schumacher's Tables 



of Aberration and Nutation 248 



On the late Opposition of the Planet Vesta. By S. Groom- 

 bridge, Esq. F.R.S. Sfc 249 



Observations on the Experiments of Mr. Murray on the sup- 

 posed Relation between Caloric and Magnetism. By An 



Experimenter 251 



On the Cause of the Magnetic Power of the Poles of the Earth. 



/(y il/r. William Dobbie 252 



Description of the Methods employed in determining the Alti- 

 tudes of several of the principal Mountains and other re- 

 markable Objects visible from the Trigonometrical Station 

 on Rumbles Moor, Yorkshire. By A Correspondent. 



255 



Inquiry relative to the Catalogue of Zodiacal Stars . 265 



Announcement that a Discovery has been made which will 



render Pot- and Pearl-ashes no longer indispensable to 



Bleachers. By Gavin Inglis, Esq. .... 265 



Proposal for a new Method of determinifig a Fixed Unit of 



Measure, by deducing the same from the Curvature of the 



Earth. By J AMES IBoAz, Esq. of Glasgow . . . 266 



Abstract of an Essay by M. Girard " on the Resistance of 



Cast-iron in relation to its Use for Conduit Pipes, and the 



Boilers of Steam- Engines." Communicated by Mr. Tred- 



GOLD 270 



On Encke's Comet 275 



Sketch of a Course of Lectures on Metallurgy ; delivered at 

 the London Institution, February 1823. By J.Taylor 

 Fjsq. Treasurer of the Geological Society 283, 368, 448 

 On the Quantity of Rain collected in two Rain-gauges placed 

 at different Heights from the Ground, for a Period of Twelve 

 Months ; with Remarks on the probable Causes of the In- 

 crease in the lower Rain-gauge 321 



On Short-hand Writing. By H. Upington, Esq. 325 



On Electricity excited in Paper 330 



An alphabetical Arrangement of the Places from whence the 

 Fossil Shells have been obtained, which are engraved, co- 



