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The Letters of Euler to a German Princess have acquired over all Europe a celebrity to which the reputation of the Author, the choice and importance of the several subjects, and the clearness of elucidation justly entitle them. They have deservedly been considered as a treasury of science, adapted to the purposes of every common seminary of learning. They may be studied to advantage without much previous elementary knowledge; they convey accurate ideas respecting a variety of objects, highly interesting in themselves, or calculated to excite a laudable curiosity; they inspire a proper taste ...

One of the earliest of the popular science book genre, it is a philosophical summary of the new physics of the era by a leading British physicist. Keeping technical references to a bare minimum, Jeans argues that physics has entered a new age in which mathematical representation has supplanted mechanical models. This recording was originally published on Legamus.eu and was later released on LibriVox when US copyright permitted. - Summary by Peter Tucker

The Scientific American may be the oldest continuously published periodical in the United States, having launched its first publication in 1845. It has been a mainstay of popular science with in depth articles across a broad spectrum of scientific fields. In this supplement are short articles ranging through such topics as Camellias, Experiments in Memory, The Chemical Action of Light, and longer articles on the Gas Engine, and Optical Telegraphy. - Summary by Larry Wilson

Treatise on Light was published in 1690 and is probably the largest scientific volume on light published before Newton's Opticks. The book explains how light travels (i.e., that it has a certain velocity), and what happens when it hits a surface (refraction and reflection). A large portion of the book is devoted to the double refraction occurring in Iceland chrystal, and all drawn conclusions are proved geometrically. Christiaan Huygens (1629 - 1695) was a prominent physicist and astronomer. His main discoveries are the centrifugal force, collision laws for bodies and the argument that light ...

This is a satirical novel written by Edwin A. Abbott, first published in 1884. Abbott uses a two-dimensional world, with himself as the protagonist, known simply as "A Square", to deride the Victorian aristocracy and its hierarchies. But the book has retained its value throughout the years for its unique portrayal of a two-dimensional world, and how a Sphere introduces the Square to the incomprehensible possibility of a third dimension. Once the square fully understands the third dimension, he suggests to the Sphere that even a fourth, fifth, or sixth dimension could exist. But the Sphere ...

The Scientific American may be the oldest continuously published periodical in the United States, having launched its first publication in 1845. It has been a mainstay of popular science with in depth articles across a broad spectrum of scientific fields. In this supplement are short articles ranging through such topics as Iron Sailing Ships, Coal Tar as Fuel for Steam Boilers, Pepsin, A Chinese Imperial Cemetery, and Subterraneous Flora and Fauna. - Summary by Larry Wilson

This is the story of talking at a distance, of sending messages through space. It is the story of great men—Morse, Thomson, Bell, Marconi, and others—and how, with the aid of men like Field, Vail, Catty, Pupin, the scientist, and others in both the technical and commercial fields, they succeeded in flashing both messages and speech around the world, with wires and without wires. It is the story of how the thought of the world has been linked together by those modern wonders of science and of industry—the telegraph, the submarine cable, the telephone, the wireless telegraph, and, most ...

The main purpose of this book is to show the historical relations of the new principle to the old philosophical problems and to the classical theories of space and time. - Summary by Adapted from the Preface

A brief history of the rise and reign of Duke William of Normandy, King of England. Also known as William the Bastard, and William the Great, but perhaps best known in English history as William the Conqueror. Written by Edward Freeman, originally in 1888, as part of the Twelve English Statesmen series of books. (Summary by Cavaet)

Sintoniza el mapa del cielo desde la profundidad del sótano nerd. En Frecuencia Estelar, disecciono los misterios de Numerologia, Astrología y esoterismo técnico, tomando como brújula la legendaria enciclopedia Salvat, Soy Andres Ortiz (Mortiz) y aquí transformo el polvo de estrellas en conocimiento práctico, lecciones astrológicas, mitos y el legado oculto milenario, todo en una misma frecuencia y vibración. Bienvenidos a este pos at donde el cosmos se vuelve audible.

Lenny Vaughn unlocks the sitar's mesmerizing voice, exploring its curved frets, sympathetic strings, and drone-rich design. From resonance physics to global crossover moments, discover why this Indian masterpiece captivates listeners worldwide. For more content like this, visit QuietPlease.ai This content was created in partnership and with the help of Artificial Intelligence AI.

Host Lenny Vaughn explores why minor keys pierce the heart, examining the science of sad intervals, haunting transformations, and building sonic spaces for grief. A meditation on music's darkest frequencies and our need to sit with sorrow. For more content like this, visit QuietPlease.ai This content was created in partnership and with the help of Artificial Intelligence AI.

Join host Lenny Vaughn on a rhythmic journey exploring andante, music's walking tempo, and how it shapes movement and emotion. Discover the science behind our stride, hear how composers reimagined this pace, and learn why slowing down might be exactly what our world needs. For more content like this, visit QuietPlease.ai This content was created in partnership and with the help of Artificial Intelligence AI.

Host Lenny Vaughn explores fortissimo — music's most commanding dynamic. Each episode dives into the science, history, and raw power of playing at peak volume. For more content like this, visit QuietPlease.ai This content was created in partnership and with the help of Artificial Intelligence AI.

It would be an interesting thing to make a careful study once a year, towards the end of the summer, of the habits and customs of thunder and lightning. Perhaps in this way we should succeed one day in determining the still mysterious nature of these elusive forces. I, for my part, have been engaged upon the task for many years past. It has produced a big accumulation of records, and in this volume I can find room but for a résumé of them, as varied as possible. - Summary by Camille Flammarion

This book was curated by the State Federation of Pennsylvania Women for tourists' use on a journey to Pennsylvania. Each of Pennsylvania's 67 counties has its own chapter, discussing beautiful art and buildings that may be found there (or, in lieu of art, pioneer history). These chapters were each written by a knowledgeable person from that county. While details are often sparse, the guide is an excellent starting point for individuals who wish to learn more about local history of Pennsylvania. Note: While the book was compiled in 1917, the first world war prevented its publication until 1924....

A short instructional book that may be of interest to nature and art lovers alike. Clifford, an artist himself, shares his tips and tricks on how to get started with tree drawing, followed by an extensive description of the main trees found in Great Britain. - Summary by Rapunzelina

This booklet is part of the "Understanding the Atom Series" published by the Division of Technical Information of the U.S. Atomic Energy Commission. From an introduction of atomic theory by the ancient Greeks through the development of the fission bomb, the author covers such areas as the discovery of the nucleus, the discovery of isotopes, fission and fusion including a chronology of atomic theory to 1963, and the development of the Atomic Energy Commission. (Summary by Larry Wilson)

This book, published in 1918 by the Atlantic Monthly Press, is a collection of 23 "modern short stories", written by various authors as follows: Cornelia A. P. Comer, Amy Wentworth Stone, Elizabeth Ashe, Dallas Lore Sharp, H. G. Dwight, Mary Lerner, Charles Caldwell Dobie, Henry Seidel Canby, Zephine Humphrey, Katharine Fullerton Gerould, Katharine Butler, Madeleine Z. Doty, F. J. Louriet, Ernest Starr, C. A. Mercer, Margaret Sherwood, E. Nesbit, E. V. Lucas, Margaret Lynn, Margaret Prescott Montague, and Arthur Russell Taylor. This audio compilation begins with the stories themselves, each ...

Ezra Wade drags astrophysics off the whiteboard and into the existential deep end, turning cosmic discoveries into unsettling questions about reality, time, and what we thought we understood. Each episode starts with universe-breaking science and ends somewhere between wonder and discomfort. For more content like this, visit QuietPlease.ai This content was created in partnership and with the help of Artificial Intelligence AI.