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Originally published in 1940, this book by famous Plotinus scholar Arthur Hilary Armstrong assesses how the philosopher's hierarchy of reality fits into the wider universal order, and how the historical and philosophical tradition gave rise to Plotinus' own philosophies. Armstrong also supplies a bibliography broken down by topic for those who wish to pursue any aspect of the text in greater depth. This book will be of value to anyone with an interest in Plotinus, Neoplatonism and in the pagan roots of Christian philosophy.

Recent research on superconductors with high critical temperature has led to results that were not available when the original German edition was prepared but could be included in the present English edition. This concerns materials based on bismuth and thallium, as well as measurements of low microwave loss. The author would like to thank Mr. A. H. Armstrong for translating the book from German to English in a very dedicated and competent manner. Thanks are also due once again to Springer-Verlag for their generous support and cordial cooperation. Bad Salzdetfurth September 1989 Johann H....

The present book is a translation of the original German edition (published in 1982) with some minor corrections and improvements. The guide to sup- plementary and advanced literature given in the Appendix, however, has been brought up to date. This book is addressed primarily to students taking astronomy as a prin- cipal or subsidiary subject, and to scientists of related fields, but amateur as- tronomers should also be able to profit from it. For most chapters an elementary knowledge of mathematics and physics will be sufficient, however, Chaps. 5 and 6 impose somewhat greater requirements....

A collection of children's tales, handed down by Seneca Indians. They have been gathered together by a Seneca anthropologist, who himself is the grandson of a leading Seneca chief.