The Telephone: An Account of the Phenomena of Electricity, Magnetism, and Sound, as Involved in Its Action

In Short

This work is a contemporary technical account of the telephone’s development in the late 1870s. It functions as both a scientific primer on electricity, magnetism, and acoustics and a practical manual for building a speaking telephone. By grounding the invention in well-understood physical principles—rather than treating it as a mysterious technological breakthrough—the text demystifies the device for the Victorian reader. It remains a valuable historical artifact because it captures the excitement of the era’s "telephone mania" while grounding that excitement in the rigorous, disciplined language of experimental physics.

The Story

The narrative begins by establishing the necessity of understanding physical forces to comprehend the telephone. The author initiates a broad survey of electrical history, starting with the pioneering work of Sir Humphry Davy and moving through the discoveries of Oersted and Ampere regarding the relationship between electric currents and magnetic needles. This historical context serves as the bedrock for the book’s central argument: that the telephone is not a miraculous invention, but the logical application of known physical laws.

The arc of the book moves from these fundamental observations to the mechanics of batteries and induction. The reader is walked through the challenges of early battery design, such as the polarization of plates, and the solutions provided by the Daniell Cell. The focus then shifts to magnetic induction, detailing how moving a magnet near a coil of wire generates a current—a principle essential to the telephone's function. The text explains that electricity and magnetism are essentially forms of motion, and that a magnet functions like a machine for converting mechanical energy into other forms.

Once the physical principles are established, the book transitions to the physics of sound. It explains pitch, the limits of human hearing, and the concept of sympathetic vibrations—where a sound wave causes a corresponding body to resonate. The author details how complex sound waves, such as the human voice, can be analyzed and synthesized, referencing the work of Helmholtz. This lays the groundwork for understanding how the telephone captures the nuance of speech.

Finally, the narrative reaches its practical conclusion: the invention and construction of the speaking telephone itself. The author acknowledges the work of Philip Reiss and A. Graham Bell, contrasting their approaches. Reiss used a membrane to break an electrical circuit, which the author argues is an inferior method. In contrast, the author presents his own design, which utilizes a magnet and a thin iron plate to induce currents without breaking the circuit. The book concludes with explicit, step-by-step instructions for constructing this device. The author suggests that the telephone is merely in its infancy, comparable to the telegraph in 1840, and posits that the only barrier to further radical inventions—such as aerial navigation or the global broadcast of a single orator—is the mechanical application of the principles already described in the text.

How It Unfolds

The foundations of force The book opens with a survey of the history of electricity, emphasizing the breakthroughs of Oersted and Ampere. It establishes that our understanding of these forces relies on the galvanometer and the study of magnetic needles.

The mechanics of energy The narrative progresses into the complexities of batteries and the nature of magnetic induction. It illustrates how motion, electricity, and magnetism are inextricably linked through molecular structure.

The science of sound The focus shifts to acoustics, explaining the relationship between vibration frequencies and musical pitch. The author details the phenomenon of sympathetic vibrations to show how one object can "listen" to another.

The synthesis of speech The text connects complex sound waves to the human voice, analyzing how overtones create quality and timbre. This section prepares the reader to understand how a mechanical device might replicate those complex vibrations.

The birth of the telephone The book examines the attempts of Reiss and Bell to transmit speech before revealing the author’s own experimental design. It provides specific, actionable instructions for building a functioning telephone using a U-shaped magnet and thin steel plates.

The People

The figures in this book are primarily the philosophers and inventors who pushed the boundaries of physical science. Sir Humphry Davy, Oersted, and Ampere appear as the intellectual architects whose early observations on galvanic fluids and magnetic deflection made later inventions possible. Helmholtz is presented as the primary influence on the study of sound, particularly through his work on synthesizing vowel sounds and analyzing overtones.

Philip Reiss and A. Graham Bell are the key contemporaries of the author. Reiss serves as a cautionary example of an inventor who utilized a membrane to break an electrical circuit, which the author views as a flawed approach. Bell is acknowledged as an independent discoverer who successfully solved the problem of transmitting speech, though the author notes that Bell’s path was distinct from his own. The author, Amos Emerson Dolbear, positions himself as both a scientist and an inventor. He is the central voice of the book, moving from the role of a teacher explaining the laws of nature to that of a creator sharing his specific, patented design for a speaking telephone. He views these men not as rivals in a commercial sense, but as seekers navigating the same set of scientific truths.

In Its Own Voice

The author highlights the necessity of movement in generating the electrical currents required for communication:

In each case there is generated a current of electricity which lasts no longer than the mechanical motion of the parts lasts.

He addresses the long-standing mystery of why such a simple invention as the telephone took so long to emerge:

Men of science, as a rule, do not feel called upon to apply the principles which they may discover.

He reflects on the potential for future technological advancements, suggesting that the telephone is merely a starting point:

Mechanism is all that stands between us and aerial navigation; all that is necessary to reproduce human speech in writing; and all that is needed to realize completely the prophetic picture of the "Graphic," of the orator who shall at the same instant address an audience in every city in the world.

What It's Really About

At its core, this book is about the unity of physical forces. The author argues that electricity, magnetism, and sound are not separate, mysterious phenomena but are all different manifestations of motion. By framing the world this way, the book seeks to strip away the "magic" of new technology, replacing it with a predictable, mechanical reality. It is a work of scientific optimism, promoting the idea that nature is a system governed by laws that, once mastered, allow humans to manipulate the environment to their benefit. It also serves as an argument for a more applied approach to scientific education, urging readers to move beyond mere discovery and embrace the role of the inventor to solve the problems of the age.

Why Read It Today

Readers interested in the history of technology or the evolution of scientific writing will find this book particularly rewarding. It offers a rare window into the 1870s, a moment when the world was literally being rewired. The prose is precise, warm, and remarkably clear, though modern readers should be prepared for the dense, Victorian-era technical terminology and the author's occasional reliance on now-outdated theories, such as his musings on the "ether."

What stays with you is the sheer wonder of a time when the telephone was a DIY project rather than a ubiquitous, invisible utility. It is fascinating to read the author's predictions for the future—some of which, like the global broadcast of a voice, have long since come to pass. While the book contains diagrams and specific instructions that may be difficult to follow without a background in physics, the underlying narrative of human curiosity and the drive to harness the invisible forces of the universe remains timeless. It is a challenging but deeply grounding read for anyone who wants to understand the intellectual rigor that preceded the information age.