grateful for information, advice and criticism: Thomas H. Norton of the
Department of Commerce; Dr. Bernhard C. Hesse; H.S. Bailey of the
Department of Agriculture; Professor Julius Stieglitz of the University
of Chicago; L.E. Edgar of the Du Pont de Nemours Company; Milton Whitney
of the U.S. Bureau of Soils; Dr. H.N. McCoy; K.F. Kellerman of the
Bureau of Plant Industry.

E.E.S.




LIST OF ILLUSTRATIONS


The production of new and stronger forms of steel is one
of the greatest triumphs of modern chemistry _Frontispiece_

FACING PAGE

The hand grenades contain potential chemical energy
capable of causing a vast amount of destruction
when released 16

Women in a munition plant engaged in the manufacture
of tri-nitro-toluol 17

A chemical reaction on a large scale 32

Burning air in a Birkeland-Eyde furnace at the DuPont