TO OUR READERS AND CORRESPONDENTS. 



We have to acknowledge the arrival of the following articles for insertion 

 in this Journal, which will be duly attended to : — 



On the Junction of Granite and Sandstone in Sutherland, by Dr. MaC 

 CuUoch. 



On the Diluvium in Norfolk, by Mr. Rose. 



On the Agency of Carbonic Acid, by Dr. Marshall Hall. 



Continuation of the History of Horticulture. 



On Malaria, as affecting Ships. 



On the Aurora Borealis, by Mr. Kendall. 



On the Ornaments of Architecture. 



We have also been obliged to postpone the reviews and notices of 

 several scientific works. 



Our thanks are due to the suggestions of "A Constant Reader," who 

 will perceive that we have attended to them. 



The inferences of a correspondent at Manchester are wholly incorrect ; 

 the length of the communication, which would have occupied at least forty 

 pages, and the refusal of the author either to abridge or divide it, were the 

 reasons that induced us to return it. We are frequently obliged to refuse 

 valuable papers upon similar grounds. 



Dr. Mills's letter, from Bogota, has just reached us, and shall appear in 

 the ensuing number of this Journal. 



Mr. Johnson's paper on Saline Manures will appear in our next. 



