Das Protoplasma der Rhizopoden und der Pflanzenzellen ein Beitrag zur Theorie der Zelle

A groundbreaking 19th‑century treatise delves into the mysterious substance that drives life inside the tiniest cells. By comparing the shimmering movement of tiny grains in amoeboid organisms with the subtle motions of plant‑cell protoplasm, the author challenges the dominant cell theories of the time and proposes a new way of understanding how cells build and sustain tissue.

Through meticulous experiments—ranging from pure water washes to the effects of heat, chemicals, and even electricity—the work documents how contractile forces generate motion in both animal and plant cells. Detailed observations of pseudopod formation, grain behavior, and the interplay of internal and outer layers reveal early insights into cellular consistency and function, offering listeners a vivid glimpse into the formative debates that shaped modern biology.