CONTENTS of N° 14.— New Series. 



XIII. On the mutual Decomposition of Sulphate of Zinc and 

 Chromate of Potash. By T. Thomson, M.D. F.R.S. L. & E. Pro- 

 fessor of Chemistry in the University of Glagow page 81 



XIV. On the Measurement by Trigonometry of the Heights of 

 the principal Hills in the Vicinity of Dent, Hawes, and Sedbergh, in 

 Yorkshire. By John Nixon, Esq. ( To be continued.) 82 



XV. On Mr. Herapath's Method for the Integration of Linear 

 Equations with constant Coefficients 96 



XVI. On the Error imputed by Mr. Herapath to Lagrange in hie 

 Method of integrating Linear Differential Equations. By A Cor- 

 respondent 97 



XVII. On the ultimate Composition of simple alimentary Sub- 

 stances ; with some preliminary Remarks on the Analysis of or- 

 ganized Bodies in general. By William Prout, M.D. F.R.S 98 



XVIII. On the Means of ascertaining the Purity of Sulphate of 

 Quina. By R. Phillips, F.R.S. L. & E. &c Ill 



XIX. On the Phaenomena of Water-spouts. By Mr. James 

 Main 114 



XX. On the Nursing Pouch or Chamber of the Chama concamerata 



of Gmelin. By John Edw. Gray, Esq. F.G.S. &c 117 



XXI. On an Apparent Violation of the Law of Continuity. By 

 P.M.Roget,M.D.F.R.S ^... 118 



XXII. On the Titaniferous Iron-slag of Konigshiitte in Upper 

 Silesia, and on the Probability of its containing Tantalium. By 

 Prof. Hunefeld, of Greifswalde 121 



XXIII. Notices respectingNew Books: — Philosophical Transactions 

 for 1827. Part II. : Transactions of the Linnean Society of London. 

 Vol. 15th. Part II. : Memoirs of the Astronomical Society. Vol. 3rd. 

 Part 1 126 



XXIV. Proceedings of Learned Societies: Royal Society ; Linnaean 

 Society ; Geological Society ; Astronomical Society ; Royal Geo- 

 logical Society of Cornwall ; Royal Academy of Sciences of Paris. 



128— 144 



XXV. Intelligence and Miscellaneous Articles : — On the Fluidity 

 of Sulphur and Phosphorus at common Temperatures, by Mr. Fara- 

 day ; Elementary Nature of Bromine ; Quantity of* Bromine in Sea 

 Water; Sale of Bromine ; Preparation of Iodous Acid ; New Borate 

 of Soda ; Analysis of a Salivary Concretion ; Haidingerite, a new 

 Mineral Species ; Bromide of Selenium, by M. Serullas ; Electricity 

 of Gases and the Atmosphere ; Rose-coloured Petrosilex from Sahl- 

 bergh in Sweden ; Nontronite, a new Mineral ; Analysis of some 

 Vegetable Products; New Chloride of Manganese; On the Power 

 of Water and Bromine in conducting Electricity : Effects of Heat 

 upon Sulphur ; Peroxide of Barium ; on certain habitudes of Sepia ; 

 Notice of an Error in Galbraith's Mathematical Tables and Formulae; 

 Errors in Hutton's Log. Tables (Fifth Edition) ; Crystallization of 

 Phosphorus ; Chemical Examination of Ancient Instruments, &c. ; 

 London Institution ; New Patents ; Meteorological Observations, 

 Table, &c 144—160 



\* 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- 



