Vol.64. Philosophical Magazine. August 1824. 



, — . — , — __ — __ 



Contents of Number 316. 



XII. The Theory of Vegetable Physiology of M. Aubert du 

 Petit Thouars ; or of the Increase of Plants by means of Buds, or 

 fixed Embryos. By John Lindley, Esq page 81 



XIII. On the Extraction of Selenium from the Residuum of the 

 Sulphuric Acid Works of Lukawltz in Bohemia; and on the Cause 

 of the Odour of Tellurium. By Professor Scholz, of the Polytechnic 

 Institution of Vienna 83 



XIV. Hints towards the Natural History of the Toad. By Wm. 

 Fothergill, Esq 85 



XV. Some Observations on the Migration of Birds. By the late 

 Edward Jenner, M.D. F.R.S. ; with an Introductory Letter to 



Sir Humphry Davy, Bart. Pres. R.S., by the Rev. G. C. Jenner. . 91 



XVI. Introduction to the Seventh Section of Bessel's Astrono- 

 mical Observations 1 02 



XVII. An Account of the Mcsembryanthema Ringentik. By A. H. 



H aworth, Esq. F.L.S. &C ; 189 



XVIII. A Sketch of the Progress of Science respecting Igneous 

 Meteors and Meteorites during the Year 1823 ; including an Account 

 of the principal Phenomena of that Nature observed during the same 

 Period : with Inquiries suggested by those Subjects. By E.W. Bray- 

 ley, junior, A.L.S., and Member of the Meteorological Society . . Ill 



XIX. Analyses of a Series of Papers on the Structure, Distribution, 

 and Functions of the Nerves; by Charles Bell, Esq. ; which have 

 appeared in some late Volumes of the Philosophical Transactions.. . 1 



XX. On Mr. Samuel Seaward's Claim to the Invention of a 

 Hydro-pneumatic Pump for compressing Gases, &c. By John 

 Martineau, Esq 199 



XXI. An Attempt to explain the Action of the Voltaic Pile. By 

 Mr. Thomas Pollock ". 12{3 



XXII. Of Semi-decussation of the Optic Nerves. By William 

 Hyde Wollaston, M.D. V.P.R.S iM 



XXIII. Observations on the Heights of Places in the Trigonome- 

 trical Survey of Great Britain, and upon the Latitude of Arbury Hill. 



By B. Bevan, Esq 14>(j 



XXIV. Notices respecting New Books : — Transactions of the 

 Horticultural Society for 1824 ; Analysis of Periodical Works on Na- 

 tural History 1 4-' 



XXV. Proceedings of Learned Societies: — Horticultural Society ; 

 Royal Academy of Sciences of Paris ; and Calcutta Native Society. . I 4m 



XXVI. Intelligence and Miscellaneous Articles: — Geology of the 

 Ganges and Jumna; Analyses by Piof. Gmelin of Tubingen; Adul- 

 teration of Tea; New Analysis of Camphor, by Dr. Gobel ; Contrac- 

 tions produced by Heat in Crystals; Direction of the Axes of 

 double Refraction in Crystals ; Supposed Effects of a Water-spout ; 

 Explosive Engine; Rifle Rockets; Rain, and Height of the Barometer 

 in May; Calendar of Flora, Fauna, and Pomona, at Hartfield in 

 Sussex, from July 19 to August 13 ; List of New Patents ; Meteoro- 

 logical Table H9— 161 



.» 



%* Communications for this Work, received by the "Editors, 

 38 Shoe-Lane, will meet with every attention. 



RICHARD TAYLOR, PRINTER, SHOE-LAN^/ LONDON. 



