Twelve lectures with an
introductory lecture given in Nuremberg, 17–30 June 1908
Anthroposophical
Publishing Company London
Edition revised 1958 by M. Cotterell, Introductory lecture published
in English translation for the first time.
Translation font shorthand reports unrevised by the lecturer,
publication by permission of the Rudolf Steiner-Nachlassverwaltung,
Dornach, Switzerland.