POPULAR LECTURES 



ON 



SCIENCE AND AET; 



DELIVERED IN THE PRINCIPAL 



CITIES AND TOWNS OF THE UNITED STATES. 



BY 



DIONYSIUS LARDNER, 



DOCTOR OF CIVIL LAW, FELLOW OF THE ROYAL SOCIETIES OF LONDON AND EDINBURGH- 

 OF THE ROYAL IRISH ACADEMY, MEMBER OF THE PRINCIPAL EUROPEAN SOCIETIES 

 FOR THE ADVANCEMENT OF SCIENCE, AND FORMERLY PROFESSOR OF ASTRON- 

 OMY AND NATURAL PHILOSOPHY IN THE UNIVERSITY OF LONDON. 



" The most obvious means of elevating the people, is to provide for them works on popular and prac- 

 tical science, freed from mathematical symbols and technical terms, written in simple and perspicuous 

 language, and illustrated by facts and experiments which are level to the capacity of ordinary minds." 



London Quarterly Review. 



IN TWO VOLUMES, 

 VOL. II. 



03** A 



NEW YORK: 

 GREELEY & McELRATH, TRIBUNE BUILDINGS. 



1846. 



