This translation of two of Dr. Steiner's works on Haeckel was
originally published by the Theosophical Society in one volume
with an essay on the Working of Karma. By the courtesy of the
Theosophical Society and with the kind consent of the
translator, Dr. Bertram Keightley, LL.D., M.A., the parts
referring to Haeckel are now reprinted in this volume.
the original German the two parts were published separately:
Haeckel und seine Gegner. Haeckel
and his opponents: a brochure, 1900, page 1.
Haeckel, die Welträtsel und
die Theosophie. Haeckel, “the Riddle of the
Universe” and Theosophy: a lecture given at Berlin,
5th October, 1905.