CONTENTS of N° 19.— New Series, 



I. On Herderite, a new Mineral Species. By W. Haidinger, 

 Esq. F.R.S.E 'page 1 



II. Reply of Drs. Tiedemann and Gmelin to the Remarks of Dr. 

 Prout inserted in the Annals of Philosophy (Second Series)., vol. xii. 

 p. 405: Communicated by Thomas Thomson, M.D. F.R.S. &c. Re- 

 gius Professor of Chemistry in the University of Glasgow 3 



III. On the Latitudesand Difference of Longitude of Beachy Head 

 and Dunnose in the Isle of Wight, as laid down in the Trigonometri- 

 cal Survey of England ; and the Length of a Degree perpendicular 

 to the Meridian at the Latitude of Beachy Head. By J. Ivory, Esq. 

 M.A. F.R.S 6 



IV. Additional Remarks on the Artificial Production of Cold. By 

 Richard Walker, Esq., of Oxford 11 



V. Observations on the Geology of the Hyderabad Country 12 



VI. On the Figure of the Cells of the Honeycomb. By Samuel 

 Sharpe, Esq. F.G.S , 19 



VII. Chemical Examination of the Oxides of Manganese. By 

 Edward Turner, M.D. F.R.S. Ed. Professor of Chemistry in the 

 University of London, and Fellow of the Royal College of Physicians 



of Edinburgh. ( To be continued) 22 



VIII. Experiments on the Pressure of the Sea* at considerable 

 Depths. By Jacob Green, M.D. Professor of Chemistry "in 

 Jefferson Medical College, Philadelphia, United States «. 36 



IX. Notices respecting New Books: — Martin's Geological Memoir 



on a Part of Western Sussex ; — Fyfe's Elements of Chemistry. . 38—55 



X. Proceedings of Learned Societies : — Royal Society ; Linnaean 

 Society ; Astronomical Society ; Proceedings at the Friday- Evening 

 Meetings of the Royal Institution of Great Britain 55 — 65 



XI. Intelligence and Miscellaneous Articles : — Direct Method 

 of ascertaining the Velocity of Cannon-balls ; Chrysolite in the 

 Cavities of Obsidian ; Meteor of a Green Colour ; Bitter of Aloes ; 

 Carbazotic Acid ; Heat developed during Combustion ; On the Sugar 

 of Liquorice-Root ; Solution in Sulphuric Acid without Oxidize- 

 ment; Vegetable Albumen and Gelatine; Anhydrous Crystals of 

 Sulphate of Soda; Caseous Oxide, and Caseic Acid ; Rib of a Whale 

 found in the Diluvium of Brighton Cliffs ; Inequality of the Dark 

 Space between the Body of Saturn and its Ring ; Native Iron ? 

 slightly arseniuretted ; Arseniate of Cobalt ; Solar Spots, &c. ; New 

 Patents ; Meteorological Observations; Table, &c 65—80 



\* It is requested that all Communications for this Work may be addressed, 

 post paid, to the Care of Mr. R, Taylor, Printer, Red-Lion-Court, Fleet- 

 Street, London. 



