OTHER TITLES IN A CENTURY OF 

 PROGRESS SERIES 



MODERNIZING THE FARM (Agricultural Engineering) 



S. H. McCrory, Bureau of Agricultural Engineering, United 

 States Department of Agriculture 

 SAVAGERY TO CIVILIZATION (Anthropology) 



Fay-Cooper Cole, Department of Anthropology, University 

 of Chicago 

 THE UNIVERSE UNFOLDING (Astronomy) 



Robert H. Baker, Department of Astronomy, University of 

 Illinois, Urbana 

 THE NEW NECESSITY (Automotive Engineering) 



C. F. Kettering and Associates, General Motors Research 

 Laboratories, Detroit, Michigan 

 FLYING (Aviation) 



Major General James E. Fechet, United States Army 

 (Retired), Formerly Chief of Air Corps 

 MAN AND MICROBES (Bacteriology) 



Stanhope Bayne-Jones, School of Medicine and Dentistry, 

 University of Rochester 

 LIFE-GIVING LIGHT (Biophysics) 



Charles Sheard, Mayo Foundation, Rochester, Minnesota 

 FEEDING HUNGRY PLANTS (Botany) 



Forman T- McLean, Supervisor of Public Education, New York 

 Botanical Garden, Bronx Park, New York City 

 CHEMISTRY CALLS (Chemistry) 



L. V. Redman, Bakelite Corporation, Bloomfield, New Jersey 

 TELLING THE WORLD (Communication) 



Major-General George O. Squier, United States Army (Re- 

 tired), Formerly Chief of Signal Corps 

 SPARKS FROM THE ELECTRODE (Electrochemistry) 



C. L. Mantell, Consulting Chemical Engineer, Pratt Institute, 

 Brooklyn, New York 

 INSECTS— MAN'S CHIEF COMPETITORS (Entomology) 



W. P. Flint, Chief Entomologist, State Natural History Survey, 



Urbana, Illinois and 

 C. L. Metcalf, Professor of Entomology, University of Illinois, 

 Urbana 

 EVOLUTION YESTERDAY AND TODAY (Evolution, Genetics 



and Eugenics) 



H. H. Newman, Department of Zoology, University of Chicago 



THE STORY OF A BILLION YEARS (Geology) 



William O. Hotchkiss, President Michigan College of Mining 



and Technology, Houghton 



