Scientific American Supplement, No. 841, February 13, 1892

This 1892 supplement offers a snapshot of late‑Victorian scientific curiosity, gathering articles that span everything from prehistoric mound investigations in Missouri to cutting‑edge experiments with electricity in horticulture. Readers will find clear, step‑by‑step descriptions of how electric currents influence seed germination, practical laboratory methods for detecting adulterated oils, and vivid accounts of the Mersey Tunnel’s relentless progress through riverbed rock. The collection also touches on the human side of science, with insights into Chinese competitive examinations and the daring treatment of rattlesnake bites using potassium permanganate.

Among the most memorable pieces is a lively portrait of the elusive jerboa—an African rodent rarely seen alive in Europe—detailing the challenges of capturing and caring for these delicate creatures. Additional highlights include a high‑speed engine driving a dynamo for electric lighting, a glimpse into the chemistry of newly synthesized boron compounds, and a dramatic recounting of Krakatoa’s eruption. Together, these articles transport listeners to an era where exploration, invention, and observation were reshaping the world.