If you have tried the 1951 edition free online, find it curious, inspiring yet also confusing and hard to read, try the 1985 edition. This is the definitiive ed.
Review of the 1985 edition. I read te 1951 edition years earlier.
The 1951 edition was more a "first draft" of a later, more presentable edition. 1985 is author-revised and has two additional editors.
"Man or Matter" makes no sense. The original title was Man AND Matter. 'Man AND Matter' is the relationship Lehrs builds up. The unnecessary title change--and forgetting to copyright the 1951 first ed--both suggest the quality of amateur underground publishing in the 1950s.
A Waldorf high school science teacher by profession, Lehrs works from a detailed history of science and science biography, at a high school level. He cogently, coherently and politely points out the errors, detours and dead ends exclusively materialistic science took.
Lehrs honors and values the intelligent capacities of the isolated observer-self of Cartesian-Newtonian “hard” science. Lehrs suggests awareness itself, as part of Nature, is like salt crystals dissolved into water. If over time salt content increases, eventually, salt re-crystalizes out of the water into visible, separate crystals.
Lehrs likens 'salt crystalizing out of water' to the emergence of the isolated observer-self of Cartesian-Newtonian “hard” science. This ego is a limited self, yet a necessary self, a necessary middle position which can evolve towards post-modern, whole-brain, science.
Lehrs introduces his famous metaphor of conventional-traditional scientists as one-eyed, color blind, spectator-observer, isolated, divorced and apart from Nature. This caricature is also known as "Island Man."
Lehrs re-frames the entire history of science using Goethe's holistic-humanistic approach. This leads readers to clearer view of Goethe's comprehensive holistic theory and Goethe's general holistic experimental method.
These are then applied to etheric formative forces, with varying degrees of success. At its best, a way forward is laid out to re-incorporating into post-modern science, etheric formative forces neglected-dismissed-ignored by Enlightenment science.
For Lehrs, the big picture is Nature, the external world. For Lehrs in Nature, gravity~levity are constantly at play and in play. Other forces are created out of sub-polarities arising out of the primary polarity of gravity~levity; all Nature forces created out of gravity and levity. Their meeting is the motive energy behind heat, friction, electricity, magnetism and radiation. We begin begin perceiving in Nature the over-arching influence of gravity and levity, dancing in countless combinations and expressions all around us.
Emphasis on how all forces devolve from gravity~levity is absent from the first edition. It may help to keep it in mind if you attempt reading 1951.
Lehrs resonates with Goethe, advocating a return to direct, personal observation of natural phenomena, to doing the inner work of evaluation and synthesis, to the final outer work of sharing what has been learned and how the experimenter has been changed by his or her study. This amounts to something like a return to healthy, truly human values in science.
In 100 years, etheric formative forces will find its place in holistic science. Ether can not be dismissed forever as metaphysical abstraction, as unreliable clairvoyance. Lehrs Man or Matter is not the last word on ether; it is certainly a most wonderful first word. I recommend it over Wachsmuth's, Etheric Formative Forces, which I would read second, not first.