ADVERTISEMENT. 



The object proposed in this undertaking is, 

 to extend the knowledge of Natural Science in 

 this country, by presenting the public with a 

 series of correct and elegant works on subjects 

 belonging to Natural History, at so low a price 

 as to render them accessible to all who possess 

 a taste for that delightful and instructive study. 

 The numerous illustrations, which form a pro- 

 minent feature in a publication of this kind, 

 will be executed in the first style of art. To 

 secure this important advantage, the Editors 

 have associated with themselves Mr J. B. Kidd, 

 member of the Scottish Academy of Painting, 

 Sculpture, and Architecture, an artist whose 

 attainments enable him to impart to his sub- 

 jects that accuracy to be expected from those 

 alone who are acquainted with the Physical 

 Sciences ; and when it is mentioned that the 



