Letter to Werner Zimmermann. June 20th 1936
From Spec. Ed. Mensch und Technik, Vol. 2, 1993, section 7.4.
Read "The Ox and the Chamois"[1] again. There you will find precisely the opposite preconditions, namely the release of energy through cold. Here heat
[1] See "The Ox and the Chamois" in Nature as Teacher, p.41, Vol. II of the Ecotechnology series. — Ed.] [The Energy Evolution - Harnessing Free Energy from Nature, Letter to Werner Zimmermann]
See Also
The Ox and the Chamois - mentions Werner Zimmermann