CONTENTS. Tii 



APRIL, 1S(&. 



Engravings of the following Objects: 1. View of Pleskin on tke North West 

 Side of Bengore Promontory: 2. Sir George Cay ley's Plan for a Theatre. 



E, Plan for an improved Theatre. By Sir George Cayley, Bart. In a Letter 

 from the Author - - - - - 241 



! ] A Letter on the Alterations that have taken place in the Structure of Rocks, 

 on the Surface of the Basaltic Country in the Cduntiea of Derry and Antrim. 

 Addressed to Humphry Davy, Esq., Sec. R. S. by William Richardson, D. D. 



245 



III. Remarks on the Habits of the Tmber and Northern Divers, in answer to a 

 Correspondent. In a Letter from Thomas Stewart Traill, M. D. 250 



IV. Inquiry concerning the Use of Galvanism in Deafness. By a Correspon- 

 dent ------ 260 



V. An Addition Table, with a Multiplication Table on a new Plan. By Mr. 

 Charles Hayter ----- 261 



VI. On the Cultivation of the common flax, Linuui Usitatissimum of Linne, 

 as an ornamental Plant in the Flower Garden. By Mr. John Dunbar, Gar- 

 dener to Thomas Fairfax, Esq. - - - 264- 



VII. Analysis of a Mineral Water near Dudley, in Worcestershire. By Mr. 

 H. W. Weldon - - - - 266 



VIII. On the Gold Mines in the Department of the Isere. By Hericart de 

 Thury, Mine Engineer - - - - 219 



IX. A short Account of Nectarines and Peaches naturally produced on the same 

 Branch. By R. A. Salisbury, Esq. F. R. S. &c. - - 284 



X. On the Substitution of Iron for Mahogany and other expensive Kinds of 

 Wood in Articles of Furniture and other Purposes. By Mr. B. Cook 287 



XI. On ascertaining Square Numbers and Biquadrates by Inspection. By W. 

 Saint, Esq. - - - - - 291 



XII. Some Account of Cretinism. By Henry Reeve, M. D. of Norwich. 

 Communicated by William Hyde Wolfaston, M. D. Sec. R. S. 294 



XIII. On the Composition of -the Salts of Barytes. By Mr, Arthur Aikin 301 



XIV. A Memoria Technica for double Elective Attractions. By Thomas 

 Young, M. D. F. R. S. - - - - 304 



XV. An Abstract of a Meteorological Journal for the Years 1807 and 1808, 

 kept at Middleshaw, near Kendal, in Latitude 5i° 20'. By John Gough, 

 Esq. ------ 305 



XVI. An Essay on Electrical Attractions and Repulsions. By Mr. • • * 303 



XVII. Analysis of the English Medicine called James's Powder. Communi- 

 cated by Mr. C. L. Cadet, Apothecary - - . - 316 



Scientific News - - - - - 3 1 8 



Meteorological Table - - - - - 320 



SUPPLEMENT 





