TO OUR READERS AND CORRESPONDENTS. 



We have been favoured with Communications from Mr. Burnett, Mr, 

 Kendal, and Mr. Jackson ; they reached us too late for publication in 

 the present Number. 



We have seen Mr. Quarrill's new Table Lamp, and decidedly prefer it 

 to any of its predecessors, as being perfectly sinumbral ; of an elegant 

 form ; and, what is most important, simple in its construction and 

 management. The want of a proper drawing and section has prevented 

 our giving a more detailed description of it. 



Our Correspondent at Tringham has furnished us with nothing new. 



The Letter on Agricultural Chemistry is reserved. 



In the Table of Contents to our last Volume, the Title of the following 

 Paper was accidentally omitted : — 



On the concealed Agency of Carbonic Acid in determining the 

 Decomposition of Water by the Contact of Iron. By Marshall 

 Hall, M. D., F. R. S. E., &c. ... 262 



