This classic book provides a comprehensive introduction to the asymptotic theory of electromagnetic fields. The author presents a detailed treatment of the methods and techniques used to derive asymptotic solutions to the Maxwell equations, and provides numerous examples and applications of their use. This book is an essential resource for researchers and students in the fields of electromagnetics and applied mathematics. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.