TO CORRESPONDENTS. 



We have to thank Dr. Henry for his interesting communication ; and 

 we shall be happy to receive the additions to it which he has promised. 



Mr. Henwood's Notice of his Geological Survey of the Mines of 

 Cornwall will be inserted in our next ; in which also we shall endeavour 

 to insert, if possible, Mr. Haworth's thirteenth Decade of New Succu- 

 lent Plants, 



Communications have also been received from Mr. Meikle, the Rev. 

 P. Keith, and Simplex. 



We intend taking the first opportunity of inserting the account of Dr. 

 Pearson's " Introduction to Practical Astronomy." 



It is our intention at the end of the present volume, to publish a Sup- 

 plementary Number, containing a General Methodical Index to the 

 first ten volumes of the New Series of the Philosophical Magazine and 

 Annals of Philosophy. 



%* The Editors request that all Communications intended for immediate 

 insertion may be sent to the care of Mr. Richard Taylor, Printing Office, 

 Red Lion Court, Fleet Street, London, at Jiirthest by the 15th day of the 

 month, or they mil be too late to appear in the ensuing Number. 



This Day is Published, 



A LETTER to Dr. DAVID BOSWELL REID, Experimental As- 

 sistant to Dr. Hope, &c. ; in answer to his Pamphlet entitled 

 " An Exposure of the Misrepresentations in the Philosophical Magazine 

 and Annals/' &c. 



By RICHARD PHILLIPS, F.R.S. L.& E., &c. 



Samuel Highley, 174 Fleet Street.— Price Is. 



