EDITED BT 



DIOXTSIUS LAEDNEE, D.C.L., 



Formerly Professor of Natural Philosophy and Atronomy in University College, London. 



ILLUSTRATED BT ENGRAVINGS OX WOOD. 



YOL. II. 



LONDON : 

 WALTON AND MABERLY, 



UPPER GOWER STREET, AND IVY LANE, PATERNOSTER ROW. 

 1831. 



