Warmth Course

Following his first scientific course the previous year (The Light Course), in these lectures Rudolf Steiner discusses the nature of warmth, its relationship to the four states of matter, to light, to color, and to the subearthly and superearthly realms. He extends the modern ideas of physics through aspects of understanding achieved by spiritual science. With extensive notes and diagrams, this work comprises essential reference material for natural science teachers, as well as interested parents and anyone wanting a deeper understanding of a theory of heat and warmth based on spiritual science.