CONTENTS. V 



OCTOBER, 1811. 



Engravings of the following Subjects: 1. Mr. Donkin's Tachometer, for as- 

 certaining the Velocity of Machinery. 2. A Hippograph, or Mode of coh' 

 veying Inteliisrence by Cavalry. 3. Mr. Ross's Machine for separating Iron 

 Filing's from those of other Metals. 4. Mr. Marshall's Sash-frame for pre- 

 venting Accidents. 



I. On the Destruction of an Enemy's Fleet at Sea by Artillery: by W. Moore, 

 Esq. of the .Royal Military Academy, Woolwich- - ^ ^^ 



II. Correction of an Errour in a former Paper on the Motion of Rockets. By 

 W. Moore, Esq. In a Letter from the Author - - 93 



III. On a Property of reflected Light : by Mr. Mains - - 65 



IV. Experiments on the Transmission of Sound through Solid Bodies, and 

 through Air in very long Tubes: by Mr. Biot - - 103 



V. Observations and Experiments on Pus, By George Pearson, M D. F. R. S. 



113 



VI. Description of a Tachometer, or an Instrument to ascertain the Velocities 

 of Machineiy : by Mr. Bryan Donkin, of Fort Place, Bermondsey- 121 



Vn. A Mode of conveying Intelligence from a reconnoitring Party. In k 

 Letter from a Correspondent - - - - 12(5 



VIII. Description of a Machine for separating Iron Filings from their Mixture 

 with other Metals: by Mr. J. D. Ross, Prince's Street, Soho 127 



IX. A new Method of constructing Sash Window^, so as to be cleaned or re- 

 paired wuhout the Necessity of any Person going on the outside of tlie 

 House: by G. Marshall, No. 15, Cecil Court, St, Martin's Lane l'i9 



X. Obsery^'ations on the peculiar Appearance of those MetcorE commonly called 

 Shooting Stars. In a Letter from Tliomas Forster, Esq. - 131 



XI. On the Composition of Zeolite, by James Smithson, Esq. F. R. S. 133 



XII. Extract from a Paper communicated to the American Philosophical Society 

 on the Discovery of Palladium in a Native Alloy of Gold : by Mr. J. Cloud, 

 Director of the Chemical Processes at the Mint of the United" States 137 



XIII. Analysis of the Cement of an antique Mosaic, found at Rome: by Mr. 

 D'Arcet - - - - . _ 140 



XIV. Meteorological Journal - - - - 142 



XV. Remarks on the Inclination of the Stems of Plantsnowards the Light: by 

 Mr. Decandolle - - - - - 144 



XVI. On the Forcing-houses of the Romans, with a List of Fruits cultivated 

 by them, now in our Gardens. By the Right Hon. Sir Joseph Banks, Bart. 

 K. B. P.R.S. &c. - . ^- .. ' .\ 147 



XVII. Method of preparing Ox Gall in a concentrated State for Painters, and 

 for other Uses : by Richard Carthery, No. 14, Mead's Row, Lambeth 154 



XVIII. Letter from Mr. Vitalis, Professor of Chemistry at Rouen, to Mr. 

 Bouillon-Lagrange, on the Amalgam of Mercury and' Silver, called Arbor 

 Diance - - - . - - 156 



Scientific News «, - - - . 157 



NOVEMBER, 



