TABLE OF CONTENTS 



TO THIS TWENTY-FOURTH VOLUME. 



SEPTEMBER, 1809. 



Engravings of the following Subjects : 1. Captain Bolton's improved Jury Mast 

 2. Captain H. L. Ball's Method of Fishing an Anchor: 3. Captain Ball's im- 

 proved Anchor : 4. Mr. J. Tad's Method of causing' a Door to open over a 

 Carpet : 51 Mr. W. Barlow's Wrench for Screw Nuts of any Size. 



I. On the Union of Tan and Jelly : by John Bostock, M. D. - l 



II. The Bakerian Lecture. An Account of some new analytical Researches on 

 the Nature of certain Bodies, &c. By Humphry Davy, Esq. Sec. R. S. F. R. S. 

 Ed. and M.R.I. A. ------ 12 



III. Remarks on the Boracic Acid, addressed to the first Class of the Institute, 

 December 19th, 1809, by F. R. Curaudau, Professor of Chemistry applicable 

 to the Arts, and Member of several literary Societies. - 24 



IV. Abstract of a Paper on the Decomposition and Properties of Fluoric Acid, 

 presented the 9th of January to the Mathematical Class of the Institute, by 

 Messrs. Gay-Lussac and Thenard. - • -- - 29 



V. Description of a Process, by Means of which Potash and Soda may be me- 

 tallized without the Assistance of Iron ; read before the French Institute the 

 18th of April, 1808; by F. R. Curaudau. - - -37- 



VI. Observations and Experiments on the Nature of the New Properties of the 

 Alkaline Metals ; by the same - - - - 40 



VII. Improved Method of Forming Jury Masts: by Captain William Bolton of 

 the Royal Navy - - - - 44 



VIII. An Improvement of the Construction of Anchors, to render them more 

 durable and safe for Ships : with an improved Mode of Fishing Anchors. By 

 Captain H. L. Ball, of the Royal Navy. - - . - 43 



FX. Observations on the Progress of Bodies floating in a Stream: with an Ac- 

 count of some Experiments made in the River Thames, with a View to dis- 

 cover a Method for ascertaining the Direction of Currents. By James Burney, 

 Esq. -,_.-. 40- 



X. New Method proposed for measuring a Ship's Rate of Sailing. By the same 

 Gentleman. - - - - 57 



XI. Method of preventing Doors from dragging on Carpets, or admitting Air 

 underneath them. By Mr. John Tad . - 59 



XII. Description of an improved Screw Wrench, to fit different sized Nuts, or 

 Heads of Screws. By Mr. William Barlow. - - - 61 



XIII. On the Measurement of Heights by the Barometer. In a Letter from a 

 Correspondent. - - - -63 



XIV. On theGlauberite. By Alexander Brongniart - - 65 



XV. An excellent colourless Copal Varnish. Bv Mr. Lenormand, late Professor 

 of Natural Philosophy. - - . 67 



Scientific News 68 



Meteorological Table - - - - - 80 



