CONTENTS. 



XXVI. Additional Observations on the Effects of Magnesia in 



preventing an increased Formation of Uric Acid; with Remarks 



on the Influence of Acids upon the Composition of the Urine. By 



WilJiam Thomas Brande, Esq. F, R. S. Prof Chem. R. I. 



Communicated by the Society for improving Animal Chemistry, 



p. ^^5 



XXVII. Additions to an Account of the Anatomy of the Squalus 

 Maximus y contained in a former Paper ; with Observations on 

 the Structure of the Branchial Artery. By Sir Everard Home, 

 Bart. F. R. S. p. 227 



XXVIII. Some further Observations on a new detonating Sub- 

 stance, In a Letter from Sir Humphry Davy, LL.D. F. R. S. 

 V. P. R. I. to the Right Hon. Sir Joseph Banks, Bart. K. B. 

 P. R. S. p. 242 



XXIX. Experiments on the Production of Cold by the Evapora- 

 tion of the Sulphuret of Carbon. By Alexander Marcet, M. D. 

 F. R. S. one of the Physicians to Guy's Hospital. p. 252 



XXX. On a saline Substance from Mount Vesuvius. By James 

 Smithson, Esq. F. R, S, p. 256 



XXXI. Some Experiments and Observations on the Substances 

 produced in different chemical Processes on Fluor Spar. By Sir 

 Humphry Davy, LL.D. F. R. S. V, P. R. L \x 263 



XXXII. Catalogue of North Polar Distances of Eighty-four 

 principal fixed Stars, deduced from Observations made with the 

 Mural Circle at the Royal Obsewatory . By John Pond, Esq. 

 Astronomer Royal, F. R. S. p. 280 



XXXIII. Observations 'of the Summer Solstice, 1813, with the 

 Mural Circle at the Royal Observatory. By John Pond, Esq, 

 Astronomer Royal, F. R, S, p. 304 



Presents received by the Royal Society, from November 1812 to 

 July 1813. p. 305 



Index, , 



