ACKNOWLEDGMENTS 



is due especially to the publishers and editors of SCIENCE 

 ^MAGAZINE for their kind cooperation in permitting repub- 

 lication of the following material originally published in their 

 distinguished magazine: Science, Common Sense and Decency, 

 Types of Valence. World Control of Atomic Energy is pub- 

 lished by courtesy of PROCEEDINGS OF THE AMERICAN 

 PHILOSOPHICAL SOCIETY; Surface Chemistry by cour- 

 tesy of KUNGL. BOKTRYCKERIET. P. A. NORSTEDT & 

 ^SONER, STOCKHOLM; The Constitution of Liquids with 

 Especial Reference to Surface Tension Phenomena by courtesy 

 of METALLURGICAL AND CHEMICAL ENGINEER- 

 ING; The Distribution and Orientation of Molecules by cour- 

 tesy of THE CHEMICAL CATALOG CO., INC.; Atomic 

 Hydrogen as an Aid to Industrial Research, Flames of Atomic 

 Hydrogen, Forces Near the Surfaces of Molecules, The Effects 

 of Molecular Dissymmetry on Some Properties of Matter, The 

 Evaporation of Atoms, Ions and Electrons from Caesium Films 

 on Tungsten, The Mobility of Caesium Atoms Adsorbed on 

 Tungsten by courtesy of the GENERAL ELECTRIC COM- 

 PANY RESEARCH LABORATORY; The Dissociation of 

 Hydrogen into Atoms, Parts I and II, Isomorphism, Isoste^ 

 ism and Covalence by courtesy of the JOURNAL OF THE 

 AMERICAN CHEMICAL SOCIETY; The Evaporation, 

 Condensation and Reflection of Molecules and the Mechanism 

 of Adsorption by courtesy of the PHYSICAL REVIEW. 



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