/ 



CONTENTS 

 OF THE FIFTY-FIFTH VOLUME. 



Remarks on damp Decks, and other Circumstances in the 

 Medical CEconomy of Ships. . . . . . . . . 3 



Report from the Select Committee appointed to consider the 

 Validity of the Doctrine of Contagion in the Plague. . . 8 



On the Third Edition of Professor Jameson's System of Mi- 

 neralooy. .. .. ., .. .. ..31 



Remarkt on an Article entitled " A few Facts relating to Gas 

 Illumination." .... . . . . . . . . 37 



On the Comet of July— September \8\9. . .. ..46 



Particulars of the Sword of Meteoric Iron presented by Mr. 

 Sower BY to the Emperor Alexander of Russia. . . 49 



Memoir upon the Conversion of ligneous Bodies into Gum, 

 Sugar, and a particular Acid, hy means of Sulphuric Acid ; 

 and on the Conversion of the same ligneous Substance into 

 Ulmine by Potash. . . . . . . . . 53, 118 



A Letter from Dr. Hutton to the Marquis De Laplace, on 

 several Astronomical and Philosophical Siibjects. .. 81 



Memoir relative to the Annular Eclipse of the Sun, which will 



happen on September 7 , ^^'^'0. .. .. .. ,.85 



On certain fraudulent and poisonous Sophistications. . . 102 

 Defence of M. de Prony from the Aspersions contained in 



Memoir of Mr. VJ ATT. .. .. .• .. ..113 



On the Geology of Loch Leven, in continuation of Article in 



Phil. Mag. of September \8\9. 118 



An Account of a Membrane in the Eye, noiv first described. 1 27 

 Hints respecting Naval Architecture* .. .« ..161 



Vol.55.No.266. Jane 1820. a De- 



