ELEMENTS 



OF 



NATURAL HISTORY: 



EMBRACING 



ZOOLOGY, BOTANY AND GEOLOGY; 



SCHOOLS, COLLEGES AND FAMILIES. 



BY 



W. S. W. RUSCHENBERGER, M. D., 



JRGEON, U. 8. N\VY; MEMBER OF THK AMERICAN PHILOSOPHICAL SOCIETY; OF THE AC A lj EMI 

 r MATUKAL SCIENCES, FHILAPELPHIA : OF THE AMERICAN AhbOl.lA.T10H FUR 

 THK ADVANCEMENT OF SCIENCE; <kC., ItC. 



IN TWO VOLUMES. 



WITH NEARLY ONE THOUSAND ILLUSTRATIONS, 



AND A COPIOUS GLOSSARY. 



RA 

 ' OF TMt 



<IYER8(TY f 



VOL. II. 



INVERTEBRATE ANIMALS, 



BOTANY THE NATURAL HISTORY OF PLANTS, 



GEOLOGY; THE NATURAL HISTORY OF THE EARTH'S STRUCTURE 



PHILADELPHIA: 

 CLAXTON, REMSEN & HAFFELFINGER, 



819 & 821 MARKET STREET, 



1871. 



