vii CONTENTS. 



SUPPLEMENT TO VOL. XXVII. 



Engravings of the following Subjects: 1. The Cancer Fulgens discovered by 

 the Richt Hon. Sir Joseph Banks, of the natural Size. 2. The same Animal 

 magnified. 3. The Medusa Pellucens, also found by Sir Joseph Banks, re- 

 presented of the natural Magnitude. 



I. Kosearches on the Oxiniuriatic Acid, its Nature and Combinations; and on 

 the Elements of the Muriatic Acid. With some Experiments on Sulphur and 

 Phosphorus, made in the Laboratory of the Royal Institution. By H. Davy 

 Esq. Sec. R. S. Prof. Chem. R. I. F. R. S. E. - - 321 



II. Observations upon Luminous Animals. By J, Isfacartney, Esq. Commu- 

 nicated by Everard Home, Esq. F. R. S. - - - 337 



III. Note on the \Vater contained in fused Soda. By Mr, J. E. Berard 351 



IV. On a new Pitchlike Iron Ore, or Sulphated Iron with Excess of Base: by 

 Mr. Gillet Laumont, Correspondent of the Institute, and Member of the 

 Council of Mineb- - - - - - 354 



V. Analysis of three Species of Pyrites, by Mr. Bucholz - 355 



VI. Description of Phospliated Copper; by Mr. Ilersart, Mine Engineer 358 



VII. Comparative Analysis of Gum-Resins: by Mr. Henry Braconnot, Pro- 

 fessor of Natural iliitory, &c. - ~ - - 3(ji 



VIII. Communications concerning the Royal Botanical Garden at St. Vincent, 

 from its Superintcndant Dr. Alexander Anderson, to Dr. C. Taylor 370 



IX. On the Oxide-j of Iron. By Thomas Thomson, M. D. F. R. S. E. 



Follow of the Imper. Chirurgo-Med. Acad, of Pcterbburg - 315 



