The Whole Secret Laid Open, Or the Complete Art of Making the Chemical Fulminating Objects,: Such as the Lace, or Girt of Security, Fulminating Letters, Balls, Bombs, Garters, Cards, Spiders, Segars, Chairs, Drawers, Boots, Shoes, &c. &c

In Short

This curious volume acts as both a laboratory guide and a catalogue of pranks from early nineteenth-century London. It outlines the precise, dangerous, and often startling ways to weaponize everyday objects like letters, cigars, and boots using fulminating silver—a highly sensitive chemical compound. By blending scientific curiosity with a penchant for domestic disruption, the work provides instructions intended to surprise the unsuspecting. It has endured as a fascinating historical artifact, offering a window into the era’s fascination with chemistry’s "sublime" and volatile powers.

The Story

The narrative begins with an earnest, almost reverent address to the reader, framing the study of chemistry as a "sublime science" that bridges the gap between the material world and the divine. The author positions the volatile nature of fulminating silver not as a threat, but as a gateway to "rational and innocent employment of time." From this high-minded introduction, the text descends immediately into the practical—and often perilous—details of the craft.

The core of the work serves as a technical manual for the construction of "fulminating objects." The progression is exhaustive, moving from simple, static items to increasingly intrusive ones. We learn how to prepare "The Lace," or "Girt of Security," a device meant to be hung on doorframes to announce an intruder with the force of a musket shot. From there, the scope widens to personal items: letters that detonate when opened, cards that crackle when lit, and cigars that disconcert the smoker. The author moves through the household, detailing how to hide explosive charges beneath the heels of boots, inside the mechanisms of chairs, and even within the delicate structure of artificial spiders.

As the text unfolds, the tone shifts from the grandiosity of scientific discovery to the specifics of mechanical sabotage. The author is meticulous, emphasizing the need for glass composition or glass paper to facilitate friction. The arc of the book is defined by this escalation of concealment; the reader is taught how to turn the familiar environment of a home into a minefield of small, controlled explosions.

In the final sections, the focus turns to maintenance and safety. The author repeatedly warns against heat and excessive friction, urging the reader to respect the precise measurements of the chemical agent. The closing pages offer a final exhortation to the student of chemistry, suggesting that if one adheres strictly to these instructions, they will not only be capable of creating "whimsical conjectures" among their peers but will also deepen their understanding of the natural world. The book concludes with a brief reflection on the volatile nature of the materials, leaving the reader with a final, cautious reminder that while the experiments are intended for amusement, the power of chemistry is never to be treated with "unconcern."

How It Unfolds

The scientific preface The author introduces the chemical properties of silver, framing the creation of explosive devices as a pursuit of both moral education and intellectual enlightenment. This section sets the stage by arguing that the wonders of chemistry can be found in the most mundane household materials.

The preparation of the materials The technical requirements are laid out, focusing on the sourcing of specialized chemicals and the creation of the necessary friction-inducing glass composition. Detailed instructions on where to purchase components ensure the reader has the means to construct the devices.

The architecture of the prank The text systematically categorizes the devices, ranging from stationary items like chairs and drawers to personal accessories like boots and letters. Each entry provides a step-by-step breakdown of how to hide the explosive charge so that it triggers upon the intended physical contact.

The warnings of danger Throughout the middle and end, the author intersperses technical advice with grave warnings about the volatility of the silver. The reader is constantly reminded that the line between "rational amusement" and "unpleasant consequences" is dictated by the exact weight of the chemical used.

The final scientific exhortation The concluding pages summarize the overarching philosophy of the work, encouraging the reader to continue their chemical studies beyond these specific pranks. The author signs off with the hope that the reader has gained both a new hobby and a deeper respect for the "Divine Author" of such natural phenomena.

The People

The book is driven by the voice of "The Author," an anonymous, highly methodical figure who positions himself as a mentor to the aspiring amateur chemist. He is a man of contradictions: he speaks with the gravitas of a philosopher, quoting Alexander Pope to reflect on the divine, yet he dedicates his life to the manufacture of exploding spiders and cigars. He is obsessed with precision, viewing the successful execution of a prank as a test of the student’s discipline and moral fortitude.

The second, silent figure is "The Reader," who is invited to step into the role of the prankster. The reader is expected to be an "attentive observer," someone who values both the thrill of the "whimsical" surprise and the intellectual rigor of the laboratory. They are tasked with navigating the delicate balance between the desire for "innocent amusement" and the inherent danger of handling unstable compounds. Finally, the "Suspecting or Unsuspecting Bystanders"—the targets of these pranks—serve as the necessary audience for the author’s work. Whether they are the "midnight intruders" caught by a rigged door or the "smoker" startled by a cigar, they represent the objective reality against which the author’s chemical inventions are measured and validated.

In Its Own Voice

The author sets the tone early by framing his potentially mischievous project as a high-minded pursuit of scientific wonder:

"That Chemistry is one of the most sublime sciences is generally acknowledged; to it may be ascribed the brilliant discoveries lately made in the arts and sciences, and without whose aid the wonderful phenomena, which are the subject of the following pages, could never have been discovered."

The author balances this academic tone with a very pragmatic view of the dangers involved in his experiments:

"The quantities here directed for each object must be strictly adhered to, as it is of too dangerous a nature to be increased in quantity, without the risk of accident."

He concludes by justifying the pranks as a form of intellectual play:

"Having said thus much, I can only assure my reader, that by adhering to the rules I have laid down in the following pages, they may enjoy a rational and innocent employment of time."

What It's Really About

At its core, this book explores the boundary between the controlled environment of the laboratory and the unpredictable reality of the parlor. It argues that scientific knowledge, once the preserve of the elite, should be democratized and applied to the minutiae of daily life. The questions raised are not merely about the mechanics of an explosion, but about the social utility of "amusement." The author is obsessed with the idea that the "sublime" can be found in the mundane, provided one has the technical skill to manipulate it. It is a work that views the world as a series of interactions—pulling a string, opening a drawer, walking across a floor—that can be transformed into moments of profound, chemical revelation.

Why Read It Today

Readers with an interest in the history of science or the evolution of the practical joke will find this volume uniquely compelling. It offers a rare, unfiltered look at how nineteenth-century amateurs engaged with chemistry, treating volatile substances with a casualness that is both shocking and historically illuminating. The book is not for the faint of heart; its instructions involve substances that would be considered hazardous by any modern standard, and the author’s insistence on "innocent amusement" is often at odds with the physical danger inherent in his designs.

The prose itself is a charming example of Regency-era instructional writing—precise, formal, and deeply earnest, even when describing how to hide a bomb inside a piece of court plaster. Readers should be aware that the text reflects the social attitudes of its time, focusing heavily on domestic pranks that were often aimed at unsuspecting friends or family members. If you can move past the antiquated safety protocols and the period-specific dialect, you will find a book that captures a particular, adventurous spirit of inquiry. It remains a fascinating testament to a time when chemistry was the ultimate parlor trick, and the home was a laboratory waiting to be ignited.