TO CORRESPONDENTS. 



No, XXI. of this Journal, containing " a Review of Doctor 

 Thomson's System of Chemistry," has been reprinted. 



We are much indebted for the advice of " a Member of the 

 College of Surgeons ;" it shall be strictly followed. 



Mr. Bowdich's paper on the Measurement of the Progress of 

 the Moon, with a Sextant, or Reflecting Circle, is postponed on 

 account of the extent of our astronomical communications in the 

 present Number. 



The communications of our Manchester correspondent are 

 always acceptable ; he will see we have availed ourselves of his 

 information. 



O, is in error respecting our Review department. We regret 

 that the article on Messrs. Conybeare and Phillips's Geology 

 did not reach us sooner, as we could have made room for it ; 

 we trust, however, that the delay will enable our correspondent 

 to perform his promise ; at all events, we shall take an oppor- 

 tunity, in our next publication, of recommending that excellent 

 work to our readers. 



" Confusion worse Confounded," will observe that ha has 

 been anticipated. 



We beg to decline the aid of " Speculator Mediolensis." 



An analysis of Mr. G. ManteU's work on the Geology of Sus- 

 sex, in an enclosure, signed M. G. S., did not, by some accident, 

 arrive so soon as from its date, it should. We again request 

 leave to remind our Correspondents, that articles intended for 

 insertion should reach us at least three weeks before we publish. 



Numismaticus shall be attended to whenever he chooses to 

 appear in proprid persond. 



