Appletons' Popular Science Monthly, February 1900: Vol. 56, November, 1899 to April, 1900

In Short

This volume of Appletons’ Popular Science Monthly gathers a diverse collection of scientific essays, field observations, and critical commentaries from the turn of the twentieth century. Editors and contributors examine everything from electrical transit systems and subatomic explosive charges to subterranean fish and the evolving principles of geology. Rather than presenting science as a series of finished miracles, the periodical captures a moment of active transition, weighing rapid industrial development against intellectual rigor, public credulity, and social reform. It has endured as a vivid snapshot of how modern technical and social questions were framed at the dawn of a new century.

The Story

The volume opens with a sharp warning against blind enthusiasm for sensational inventions, comparing modern financial speculative bubbles to historical manias. Its authors argue that a grounded education in physical sciences, backed by sober editorial oversight, is necessary to protect the public from fraudulent schemes claiming to extract wealth from salt water or thin air.

From this critical threshold, the text turns toward concrete physical mechanisms and the practical applications of emerging technology. Detailed technical explanations illustrate how generated currents move along bus bars and trolley lines to propel urban transit, emphasizing that energy flow is governed by the actual mechanical demands of the car's motor rather than mere generator output. The volume then examines military technology, detailing experiments with high explosives like dynamite and wet guncotton. Readers learn how explosive energy behaves under confinement and how shockwaves leave precise physical impressions—reproducing indented text and fine patterns directly onto solid iron plates.

The focus then shifts from mechanical power to the natural history of the earth and its obscure creatures. An overarching survey traces the birth of modern geology, tracking its shift away from catastrophic disruptions toward uniform, progressive crustal movement and the principle of isostasy, which holds that the earth's crust continually sinks under heavy sediment and rises where erosion relieves weight. Field reports from deep underground caverns examine the eyeless fish Amblyopsis, documenting its behavior in total darkness, its reliance on a padded lower jaw to navigate unseen walls, and its extreme vulnerability to surface parasites when removed from its native subterranean waters.

Moving from the physical realm into human institutions, the narrative broadens to address legal, religious, and social transformations. Critics within the volume target the rigidity of American criminal jurisprudence, arguing that obsolete legal dogmas and retributive penal codes fail to reflect modern scientific understanding. The collection also examines contemporary religious shifts, asserting that historical Christianity is not in decline, but rather transitioning away from rigid, antiquated dogmas toward active ethical standards and sociology. Finally, editorial notes and correspondence evaluate current intellectual controversies, language usage, and economic debates—including currency issues and coastal soil damage caused by sea water—closing a broad survey of a rapidly changing world.

How It Unfolds

Exposing speculative science Authors highlight the danger of financial manias built around sensationalized discoveries, calling for rigorous public education and dependable journals to debunk absurd scientific claims.

Explaining urban power Technical diagrams and prose break down the mechanics of the trolley system, demonstrating how electrical circuits complete closed loops from power house generators to streetcar rails.

Testing high explosives Naval and chemical experiments illustrate the tremendous force of guncotton detonations, showing how molecular shockwaves stamp delicate patterns and stencils straight into metal plates.

Charting earth's crust Geological surveys detail the shift from early theories of lawless, sudden earth movements to modern ideas of continuous crustal balance and permanent ocean basins.

Observing subterranean life Naturalists plunge into dark cave streams to capture blind fish, recording how the creatures react to water vibrations, collide safely against rocks, and succumb to mold when brought above ground.

Critiquing modern institutions Essays challenge the stagnation of criminal codes and evaluate religious transitions, urging society to align its legal and ethical frameworks with modern scientific insight.

The People

• John Trowbridge serves as the voice of scientific caution, urging the public to seek mathematical and physical training to avoid falling prey to fraudulent speculative schemes.
• William Baxter, Jr. acts as the pragmatic educator, demystifying electrical engineering for laypeople by explaining the mechanical circuits that power city trolleys.
• Joseph Le Conte leads the intellectual history of geology, charting how researchers moved past sudden catastrophic theories to understand the gradual, living balance of the earth's crust.
• Charles E. Munroe functions as the painstaking experimental chemist, documenting the precise physical effects of high explosives and guncotton charges on metallic targets.
• J. H. Dougherty stands as the legal reformer, attacking outdated criminal jurisprudence for relying on fallacious dogmas instead of scientific evidence and modern penal concepts.

In Its Own Voice

"The mysterious domains of science are still illimitable, and afford vast opportunities for inflated schemes which have their prototype in the South Sea Bubble."

Writing on scientific speculative manias, John Trowbridge warns against the public's eagerness to invest in dubious physical inventions.

"The motors hold the current back, and only allow as much to pass through them as is necessary to perform the required work..."

Explaining electrical transit systems, William Baxter, Jr. clarifies how trolley cars draw power according to immediate mechanical load.

"Instead, they constantly use the padded, projecting lower jaw as bumpers."

Observing blind cave fish in captivity, naturalists note how the creatures navigate dark waters without damaging themselves against solid walls.

What It's Really About

Underneath its technical reports and natural history surveys, the volume wrestles with the challenge of adapting human habits to a rapidly modernizing world. It argues that scientific progress requires more than just mechanical inventiveness; it demands intellectual discipline. The contributors repeatedly target intellectual slovenliness, whether it appears as public gullibility toward speculative investments, unscientific penal codes preserved out of legal inertia, or religious dogmas out of step with social ethics. Across physics, biology, law, and theology, the unifying argument is that truth is uncovered through careful induction, continuous adjustment, and the rejection of sensationalism.

Why Read It Today

This collection offers a captivating look at how turn-of-the-century thinkers viewed the threshold of the modern era. Reading it feels like browsing an intellectual almanac written at a moment when electricity, high explosives, and evolutionary geology were reshaping daily life. There is a quiet charm in its prose—direct, precise, and completely free of modern marketing jargon.

The volume will particularly appeal to readers fascinated by the history of science, technical evolution, and vintage popular education. It does present historical friction: some technical descriptions of older apparatuses require patience, and the short reviews and regional reports carry the period attitudes and formal prose style of late Victorian publishing. Yet what stays with you is the editors' enduring insistence on clear thinking. Their warning against scientific hoaxes, their call for legal reform based on evidence, and their curiosity about the natural world feel remarkably fresh and relevant today.