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 



