Xn ADVERTISEMENT. 



possibility of laying before the world illustrated 

 works of the highest class in every department, at 

 so cheap a rate, has been demonstrated by our 

 successful labours, and has given rise to others by 

 which mankind have been benefited ; and we hope 

 that although this Series of the Naturalist's 

 Library will soon be brought to a close, we shall 

 immediately follow it up with other distinct similar 

 works in various departments, the particulars of 

 which will be ere long submitted to the considera- 

 tion of our supporters. 



3, St. James' Square, 

 ' July, 1841. 



