C O N T E N T S. 



FEBRUARY, 1808. 



Engravings of the following Objects: l.New Eudiometer, by W. H. Pepys, 

 Esq.: 2*. Experiments on infloctrel Liglit, by Mr. R. Winter: 3. Figures "to 

 illustrate the Formation of coloured concentric Rings,' by Dr. W. Herschel. 



I. On Albinoes ; bv T. $. trauf, M. D. - 81 



II, Description of a new Eudiometer, accompanied with Experiments, eluci- 

 dating its Application. By William Haslediue Pepys, Esq. Communicated 

 by Charles Hatchett, Esq. F. R. S. '-' ' - 80 



111 On the Revival of ah obsolete Mode of managing Strawberries. By the 

 Right" Hon. Sir Joseph Banks, Bart, K. B. P. R. sY&c. - 95 



IV. On raising new and early Varieties of the Potato (Solanum Tuberosum.) 

 By Thomas Andrew Knight, Esq. F. R. S. &c. - - 97 



V. An Account of two Children bom with Cataracts in their Eyes, to show 

 that their Sight was obscured in very different Degrees ; with Experiments to 

 determine the proportional' Knowledge of Objects acquired by them imme- 

 diately ailer the Cataracts were removed. By Everard Home, Esq. F. R. S. 99 



VI. Experiments on various Species of Cinchona : by Mr. Vauquelin 100 



VJJ. Experiments for investigating the Cause of the coloured concentric Rings, 

 discovered bv Sir Isaac Newton, between two Object-glasses laid upon one 

 another. By William Herschel, LL.D. F. R. S. - - 121 



VIJI. A Method of finding the Specific Gravity of Light from Analogy ; and 

 the undulatory Svstem defended by an Experiment on inflected Light. In a 

 Letter from Mr. kichard Winter - - - 143 



IX. Account of an Accident from the sudden Deflagration of the Base of Potash. 

 In a Letter from a Correspondent - * * 146 



X. Correction of some Misstatements in the Account of Mr. Davy's Decom- 

 position of the fixed Alkalis, in a Letter from a Correspondent " 147 



XL An Improvement in the Galvanic Trough, to prevent the Cement from 

 being melted, when the Action is very powerful. Communicated by a Cor- 

 respondent - - - - - -148 



XII. Experiments on the Fire-damp of Coal Mines, by William Henry, M. D.; 

 including a Communication on the Subject from Thomas Thomson, M. D. 

 F. R. S. E. Communicated by Dr. Henry - 14fli 



XIII. On the Phosphorescence of Bodies, from the Action of the Electric Ex- 

 plosion. In a Letter from Mr. William Skrimshire, Jun. to Mr. John Cuth- 

 bertson --.___ 153 



XIV. Experiments on the Decomposition of the fixed Alkalis by Galvanism. 

 In a Letter from Mr. Charles Sylvester - - - 156 



Scientific News - • - * - 157 



MARCH, 



