On the mechanism of the physiological action of the cathartics

This short memoir paints a vivid portrait of a brilliant physiologist whose restless curiosity carried him from a modest Canadian upbringing to the laboratories of Johns Hopkins, Leipzig, and the University of California. It traces his early fascination with cell structure, his pioneering investigations into heart‑muscle histogenesis, and his rapid rise as a meticulous yet inventive researcher whose publications, though concise, set high standards for reproducibility.

The narrative also follows his relentless battle with a debilitating illness that forced him to retreat from clinical practice and wander between Denver, Jamaica, and Berkeley. Even as his health waned, he channeled his remaining strength into a final project on immunity, a work he meticulously prepared for publication before his untimely death. The volume stands as both a testament to his scientific rigor and a personal tribute from a close colleague, offering listeners insight into the mind of a discoverer who valued clarity, honesty, and the quiet poetry of experiment.