. Ionization and resonance potentials of some nonmetallic elements. PRICE, 5 CENTS uperintendent of Documents, Government Printing OfiSceWashington, D. C. WASHINGTON GOVERNMENT PRINTING OFFICE 1920 IONIZATION AND RESONANCE POTENTIALS OF SOMENONMETALLIC ELEMENTS By F. L. Mohler and Paul D. Foote CONTENTS Page I. Introduction 669 II. Methods of measurement 671 III. Measurements in the vapors of phosphorus, iodine, and sulphur 673 1. Phosphorus 674 2. Iodine 676 3. Sulphur 678 IV. Spectral relations 679 V. Measurements in the common gases 680 1. Introduction 680 2. Nitrogen 681 3. Oxygen 683 4. H
. Ionization and resonance potentials of some nonmetallic elements. PRICE, 5 CENTS uperintendent of Documents, Government Printing OfiSceWashington, D. C. WASHINGTON GOVERNMENT PRINTING OFFICE 1920 IONIZATION AND RESONANCE POTENTIALS OF SOMENONMETALLIC ELEMENTS By F. L. Mohler and Paul D. Foote CONTENTS Page I. Introduction 669 II. Methods of measurement 671 III. Measurements in the vapors of phosphorus, iodine, and sulphur 673 1. Phosphorus 674 2. Iodine 676 3. Sulphur 678 IV. Spectral relations 679 V. Measurements in the common gases 680 1. Introduction 680 2. Nitrogen 681 3. Oxygen 683 4. Hydrogen 685 VI. Conclusion 690 I. INTRODUCTION The methods previously applied by the authors to the study ofcritical potentials in the metallic vapors have been, with somemodifications, used for the elements phosphorus, iodine, sulphur,nitrogen, oxygen, and hydrogen. A study of the phenomena ofelectron currents in these polyatomic, nonmetallic elements can bebest introduced by a statement of the essential features of electronimpacts with metallic vapors, since woionizationresona1666unse
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