A Mechanico-Physiological Theory of Organic Evolution

This work offers a clear, step‑by‑step presentation of Carl von Nägeli’s mechanico‑physiological approach to evolution, freshly translated and revised for modern readers. The author begins with the most basic state of matter, describing how isolated molecules solidify into crystals when heat or solvent are removed, and then builds toward more complex structures. By tracing the logical progression from simple crystal formation to the earliest organized forms, the text sets a solid foundation for understanding the theory’s physical underpinnings.

The second part turns to the emergence of micellar bodies—tiny aggregates that arise when certain organic compounds, such as albumen, resist both dissolution and melting. These micelles, surrounded by a water film, can link together into larger, water‑permeated masses, displaying a surprising variety of shapes and behaviors. Within these pages the author not only lays out the scientific arguments but also invites readers to point out any imperfections, emphasizing an ongoing dialogue about the theory’s strengths and limits.