A manual of pyrotechny

In Short

This book acts as a comprehensive "how-to" for the amateur pyrotechnist of the 1820s. It provides detailed chemical foundations for gunpowder and its ingredients, alongside rigorous instructions for constructing everything from simple rockets to complex, multi-stage set pieces like suns and fountains. Written to fill a gap in literature for the hobbyist, the text prioritizes safety, precision, and scientific understanding. It remains a fascinating historical artifact, preserving the ingenuity and technical standards of an era when such displays were considered a pinnacle of rational, scientific amusement.

The Story

The narrative arc of the book follows the progression from fundamental theory to complex application. It begins by establishing the necessity of understanding the chemical nature of materials—nitre, sulphur, and charcoal—before attempting any practical work. The author introduces the history of gunpowder, attributing its discovery to figures like the monk Bartholdus Schwartz, and explains the physical phenomenon of explosion through the theories of Sir Isaac Newton. This theoretical grounding is essential, the author argues, because the artist must be able to select, purify, and proportion materials with judgment to ensure both safety and effect.

Once the chemistry is established, the book moves into the mechanics of the craft. It details the construction of apparatus, such as grinding machines, and the precise, careful process of mixing ingredients. The author emphasizes that many failures in pyrotechnics result from poor mixing rather than bad proportions, and he offers specific guidance on handling reactive materials like steel filings, which must be managed with copper tools to prevent moisture-related degradation.

With the components understood and the tools prepared, the reader is guided into the creation of "single fire-works." This includes the production of driven stars, Roman candles, and gerbes. The book then progresses to the assembly of complex, multi-stage devices. Here, the challenge shifts to the "clothing" of pieces—the arrangement of leaders and quick-match that ensures a performance proceeds in the correct sequence. The author provides intricate instructions for elaborate displays, such as "Towering Rockets" (where one rocket ignites another in mid-flight) and "Revolving Courantines" (devices that move along a line while spinning).

The final movement of the book is a series of technical recipes and design schematics. The author outlines the dimensions for various rocket calibers and the specific chemical compositions for "golden rain," "silver rain," and "water rockets." The work concludes with the most ambitious projects: large-scale mechanical displays, such as the Chinese Fountain, which requires a multi-tiered wooden frame, and complex suns that transition from horizontal to vertical orientation mid-burn. By the end, the reader has been led from the basic spark of a flint against gunpowder to the orchestration of sophisticated, timed, and visual pyrotechnic architecture, leaving the amateur with a complete system for staging impressive public or private amusements.

How It Unfolds

The chemical foundation The author initiates the reader into the properties of gunpowder, emphasizing that a successful pyrotechnist must act as both chemist and mechanic. He explains the volatility of sulphur and the rarefaction of nitre, framing the explosion not as magic, but as a predictable scientific event.

The preparation of materials The text moves to the practical handling of raw ingredients, detailing methods for purifying sulphur and preparing iron-sand. It warns against common adulterations and stresses the importance of using specific tools, such as copper shovels, to prevent chemical contamination.

The assembly of components Attention shifts to the construction of individual items like stars and Roman candles. Each step is treated with mechanical precision, focusing on the density of packing and the structural integrity of the paper cases.

The orchestration of the display The focus expands to complex pieces, where the author explains the vital role of "leaders" and "quick-match." He provides clear guidance on how to connect multiple cases so that fire travels reliably from one segment to the next, creating a sustained show.

The grand designs The final beats involve the creation of large-scale, automated mechanical fireworks, such as rotating suns and multi-tiered fountains. The author concludes by offering detailed tables and recipes that allow the reader to scale their productions according to the size of their stage.

The People

G. W. Mortimer acts as the primary voice, a mentor who assumes his reader is intelligent but inexperienced. He wants the reader to treat pyrotechnics as a "rational and scientific amusement" rather than a chaotic gamble. His primary obstacle is the "scarcity and general difficulty" of reliable information, which he overcomes by synthesizing the best knowledge from previous authors like Lieutenant Robert Jones and French artists.

He addresses the "experienced Pyrotechnist," acknowledging that they may find little new here, but he directs his primary energy toward the beginner. He views the practitioner as an "artist," someone who must balance the desire for spectacular effects with the physical requirements of the materials. By the end, he expects the reader to have transitioned from a novice who merely ignites a fuse into a careful operator who understands the "physical causes" of the flame they manipulate.

In Its Own Voice

"Before we enter into the practical part of Pyrotechny, we deem it consistent with the nature of our Work to give an ample description of the materials made use of."

The author establishes the book’s methodical approach, insisting that one must understand the chemistry of the components before attempting to build any device.

"It has been said that excellence can never be obtained, without overcoming commensurate difficulties; this is certainly verified in the preparation of this composition."

This line appears when discussing the notoriously troublesome "spur-fire" composition, reminding the reader that the most beautiful effects often require the most painstaking labor.

What It's Really About

The central argument is that pyrotechnics is a branch of applied science, not a reckless trade. Mortimer insists that by mastering the chemical properties of nitre, sulphur, and charcoal, and by applying mechanical precision to the construction of cases and leaders, one can turn a dangerous, chaotic force into a disciplined, artistic medium. The book explores the tension between human ingenuity and the volatility of the natural world, suggesting that safety and success are products of knowledge rather than luck. It asks the reader to respect the materials and the physics governing them, arguing that true mastery is found in the "perspicuity" of the design and the careful, logical progression of the display.

Why Read It Today

Readers with an interest in the history of science, DIY tinkering, or the evolution of early industrial-age hobbies will find this manual highly rewarding. It offers a clear, unvarnished window into a time when "recreative" science was a serious, tactile pursuit. You will feel the weight of the 19th-century technical language—with its "nipples," "formers," and "choaked" cases—which serves as a reminder of an era when hobbyists built their own tools from wood, string, and glue.

The book is not a modern safety manual; its advice on handling explosive materials, while earnest, reflects the period’s different standards for risk. Its difficulty lies in its archaic terminology and the assumption that the reader has access to a workshop for metal and woodworking. However, for those who enjoy literature that teaches you how the world works, it is a treasure. What stays with you is the author's profound respect for the "rational" beauty of a well-executed display—the realization that a spark, when properly guided through a series of carefully constructed paper tubes, can be transformed into a work of art. It is a quiet, precise, and surprisingly methodical look at the roots of modern spectacle.