BADGER'S 

 STUDIES IN SCIENCE 



THE HIGHER USEFULNESS OF SCIENCE. 

 By William, Emerson Ritter. 

 THE UNITY OF THE ORGANISM, OR THE 

 ORGANISMAL CONCEPTION OF LIFE. Two 

 volumes. Illustrated. By William Emer- 

 son Ritter. 



THE BEGINNINGS OF SCIENCE. By 

 Edward J. Menge. 



THE PROBABLE INFINITY OF NATURE 

 AND LIFE. By William Emerson Ritter. 

 AN ORGANISMAL CONCEPTION OF CON- 

 SCIOUSNESS. By William Emerson Ritter. 

 INSECT BEHAVIOR. Illustrated. By 

 Paul G. Howes. 



LIFE AND DEATH, HEREDITY AND EVOLU- 

 TION IN UNICELLULAR ORGANISMS. Illus- 

 trated. By H. S. Jennings. 

 THE ORNITHOLOGY OF CHESTER COUNTY, 

 PENNSYLVANIA. Illustrated. By Frank 

 L. Burns. 



FAMILIAR STUDIES OF WILD BIRDS. Illus- 

 trated. By F. N. Whitman. 

 QUESTIONS AND OUTLINES IN GENERAL 

 CHEMISTRY. By W . 8. Haldeman. 



SANITARY ENTOMOLOGY. By W. Dwight 

 Pierce. 



RICHARD G. BADGER, PUBLISHER, BOSTON 



