##### PERMEABILITY OF RUBBER TO GASES
By Junius David ELdwards and S. F. Pickering
CONTENTS
Page I. Introduction 327 II. Nature of permeability process 328 III. Methods of determining permeability and characteristics of rubber sam ples employed 328 1. Methods 329
2. Characteristics of rubber samples employed 330
IV. Relation of permeability to composition of rubber 332
V. Relation of permeability to experimental conditions 338
1. Relation of permeability to pressiu-e 338
2. Relation of thickness of rubber to permeability 342
3
.
Time of penetration of rubber 344
4. Relation of permeability to temperature 345
VI. Permeability of rubber to various gases 347
1. Permeability of rubber to hydrogen 347
2. Permeability of rubber to oxygen 348
3. Permeability. of rubber to nitrogen 349
4. Permeability of rubber to argon 350
5. Permeability of rubber to air 350
6. Permeability of rubber to carbon dioxide 351
7. Permeability of rubber to helium 352
8. Permeability of rubber to ammonia 354
9. Permeability of rubber to ethyl chloride 356
10. Permeability of rubber to methyl chloride 356
11. Permeability of rubber to water vapor 357
VII. Theory of permeability 360
VII