Vi CONTENTS. 



Page 

 Mr. Tredgold's New Theory of the Resistance of Fluids, com- 

 pared with the best Experiments. 249 



a(3on Mr. Herapath's Second Attack on Lagrange's Method 262 

 Mr. Bicheno on Systems and Methods in Natural History . . . 265 

 Dr. Brandes's Examination of a gelatinous Substance found in 

 a damp Meadow ; — as a Contribution to the Knowledge of 



the Meteors called Shooting- Stars 271 



Lieut.-Col. Miller's Description of a Percussion Rifle, igniting 



by a Spring instead of a Lock 277 



Mr. Younge's Account of an improved Form of Apparatus for 

 exhibiting M. Clement Desormes's Experiments on Currents 



of Air, &c 282 



Mr. Bracy Clark on the Insect called Oistros by the Ancients, 

 and of the true Species intended by them under this Appel- 

 lation: in reply to the Observations ofW. S. MacLeay, Esq, 

 and the French Naturalists. To which is added, A Descrip- 

 tion of a new Species of Cuterebra 283 



New Books: — Bakewell's Introduction to Geology 289 



Proceedings of the Linnaean Society 290 



■i Geological Society 291 



1 at the Friday Evening Meetings of the Royal In- 

 stitution of Great Britain . . 304? 



Royal Academy of Sciences of Paris. . . . 305 



Obituary :— Sir J. E. Smith 307 



Analysis of Alcohol, iEther, &c 309 



New Patents 311 



Meteorological Journal for 1827, kept at Gosport, Hants. By 



Dr.Burney 312 



Observations , 317 



made at the Garden of the Hor- 

 ticultural Society at Chiswick, near London ; by Mr. Giddy 

 at Penzance, Dr. Bumey at Gosport, and Mr. Veall at Boston 320 



NUMBER XVII.— MAY. 



Mr. Galbraith on the Ellipticity of the Earth, as deduced from 

 Experiments with the Pendulum ; and on the Formulae em- 

 ployed for obtaining it .... . 321 



Account of a Paper by Prof. Gauss, intitled " Disquisitiones 



f enemies circa Superficies Curvas:" communicated to the 

 Loyal Society of Gdttingen on the 8th of October 1827 . . 331 

 Dr. Weber on Savart's Experiments on the Motions of medi- 

 ately agitated Membranes 336 



Supplement : — On the Employment of a resounding Mem- 

 brane for the Observation of the Interference of the 



Undulations of Sound 342 



Mr. Ivory on the Figure of the Earth, as deduced from Mea- 

 surements of different Portions of the Meridian 343 



Dr.Wackenroder's Mineralogical and Chemical Examination of 



the Diopside of Fassa in the Tyrol 349 



Lieut.- 



