EDITED BY 



DIONYSIUS LARDNER, D.C.L., 



formerly Professor of Natural Philosophy and Astronomy in University College .London. 



ILLUSTRATED BY ENGRAVINGS ON WOOD. 

 VOL. VI. 



LONDON: 

 WALTON AND MABERLY, 



UPPER GOWER STREET, AND IVY LANE, PATERNOSTER ROW. 

 1855. 



