CONTENTS OF N5l.A 7 ew Series. 



XXVII. On the Volatility of Oxalic Acid. By EDWARD TURNER, 

 M.D. F.R.S. L. & E., Sec. G.S. Professor of Chemistry in the Uni- 

 versity of London page 161 



XXVIII. On the relative Hardness of Road Materials. By 



B. BEVAN, Esq 164 



XXIX. Observations on a Species of Muscse Volitantes apparently 

 existing in the Aqueous Humour of the Eye. By THOMAS BAT- 

 CHELOK, Esq 165 



XXX. On Mr. WITCHELL'S Method of clearing a Lunar Di- 

 stance. By C. RUMKER, Esq 168 



XXXI. Facts bearing on the Theory of the Formation of Springs, 

 and their Intensity at various Periods of the Year. By W. J. HEN- 

 WOOD 170 



XXXII. On the Calculation of the Orbits of Double Stars. By 

 Professor ENCKE 178 



XXXIII. A Botanical Description of Hermione Cypri. By 



A. H. HAWORTH, F.L.S. c.&c 183 



XXXIV. On an Omission in Clairaut's Theory of the Equilibrium 

 of a homogeneous Fluid ; in some Remarks on the 56th Article of 

 t\\Q " Bulletin des Sciences Mathematiques" for August 1830. By 

 JAMSS IVORY, Esq. M.A. F.R.S 185 



XXXV. An Examination of those Phenomena of Geology which 

 seem to bear most directly on theoretical Speculations. By the Rev. 



W. D. CONYBEARE, M.A. F.R.S. F.G.S. &c. (To be continued) .... 188 



XXXVI. Observations relative to the Origin and History of the 

 Bushmen. By ANDREW SMITH, M.D. M.W.S. &c. (To be continued.) 197 



XXXVII. Statement respecting the Legacy left by the late.Earl 

 of Bridgewater, for rewarding the Authors of Works, to be published 

 in pursuance of his Will, and demonstrative of the Divine Attributes, 



as manifested in the Creation. By DA VIES GILBERT, M.P. V.P.R.S. 200 



XXX VIII. Notices respecting New Books: Six Maps of the 

 Stars : published under the Superintendence of the Society for the 

 Diffusion of Useful Knowledge 202 



XXXIX. Proceedings of Learned Societies : Royal Society ; 

 Linnsean Society; Geological Society; Astronomical Society; 

 Zoological Society 206-232 



XL. Intelligence and Miscellaneous Articles ; Parhelia, &c. 

 lately seen at Bedford ; Aurora Borealis of the 7th of January as seen 

 at Gosport; A Mode of ascertaining the Value of Manganese Ores ; 

 Electro-chemical Decomposition of the Vegeto-alkaline Salts ; Lunar 

 Occultations of Planets and Fixed Stars by the Moon, in March 1831 ; 

 Meteorological Observations for January 1831, Table, &c 232-240 



It is requested that all Communications for this Work may he addressed, 

 post paid, to the Care of Mr. R.Taylor, Printing Office, Red Lion Court, 

 Fleet Street, London ; where complete Sets of the Old Series of the Phi- 

 losophical Magazine may be had at half of the original price. 



