BIOLOGY 

 LIBRARY 



G 



NOTE. The American Sunday-school Union have made an 

 arrangement with the London Religious Tract Society, to pub- 

 lish, concurrently with them, such of their valuahle works as 

 are best suited to our circulation. In making the selection, 

 reference will be had to the general utility of the volumes, and 

 their sound moral tendency. They will occupy a distinct place 

 on our catalogue, and will constitute a valuable addition to our 

 stock of books for family and general reading. 



As they will be, substantially, reprints of the London edition, 

 the credit of their general character will belong to our English 

 brethren and not to us ; and we may add, that the republica- 

 tion of them, under our joint imprint, involves us in no respon- 

 sibility beyond that of a judicious selection. We cheerfully 

 avail ourselves of this arrangement for giving wider influence 

 and value to the labours of a sister institution so catholic in 

 its character and so efficient in its operations as the London 

 Rdigious Tract Society. 



Jg^ The present volume is issued under the above arrange- 

 ment 



