Bøger af Oliver Lodge

The early 1890s saw the development of wireless telegraphy. Although the behaviour of radio waves had been predicted by James Clerk Maxwell, the production of a working coherer occupied some of the greatest practical physicists of the time. A giant in the field was Heinrich Hertz (1857-94), who was among the first to discover that radio waves could travel independently of wires. When Hertz died, his work was continued and soon led to the development of the first wireless radios. This book, published in 1900, is the third edition of Sir Oliver Lodge's popular explanation of Hertz's work. Including the Royal Institution lecture that Lodge (1851-1940) gave in 1894, along with detailed diagrams, it covers the basic principles of radio waves and some of the theory surrounding telegraphic technology. Also included in this reissue is Lodge's 1924 lecture on electrical precipitation, discussing the scintillating possibility of altering atmospheric conditions through the use of electrical charges.

In the 1860s, radio waves were predicted by James Clerk Maxwell in his work on electromagnetism. It took a further twenty years for the first experiments to produce a working demonstration. In this guide to radio technology, first published in 1925, eminent physicist Sir Oliver Lodge (1851-1940) provides a concise history of the development of the wireless radio, explains the theory behind it, and includes some practical tips for amateurs. Having lived through and contributed to the discovery, he explains the difficulty of the early experiments, which took place in a time when terms like 'frequency' and 'inductance', now taken for granted, did not exist in the scientific vocabulary. His first-hand account reveals the incredible efforts poured into the development of a revolutionary modern technology, rekindling the sense of wonder that once surrounded this strange new science.

As a result of being asked to give public lectures on the subject, the eminent physicist Oliver Lodge (1851-1940) published in 1892 a pioneering study of the protection of buildings, cables and telegraphic instruments from the devastation caused by lightning strikes. This work led him almost immediately to the discovery of electromagnetic wave transmission and ultimately to the development of a version of radio telegraphy. Lodge also saw that many of the current theories about the nature of lightning were seriously in error, and his investigations led to a number of significant changes in the design of lightning conductors and lightning guards. Some of the methods and procedures that Lodge advocated have since become standard practice. They are described with Lodge's characteristic flair and accompanied by a wealth of illustrations that give a fascinating insight into how contemporary scientists and engineers tackled this significant problem.

Knowing there was no money in science, Vincenzo Galilei wanted his son to become a cloth-dealer. While the young Galileo was disobeying his father and cultivating an unwholesome interest in geometry, Tycho Brahe was maintaining the impoverished Johannes Kepler and his entire family. Not long after this, a certain Cambridge mathematician noticed a strange phenomenon that became known as 'the precession of the equinoxes', before formulating his law of gravity. In this fascinating collection of lectures, first published in 1893, the eminent Professor of Physics Oliver Lodge (1851-1940) takes the reader on a tour of the history of astronomy. Including biographical notes on landmark astronomers, more than a hundred illustrations, and simple explanations of important concepts, this engaging book's range from the geocentric theory of the universe to the discovery of Neptune and the calculation of tides. It remains highly accessible to the general reader today.

The physicist Sir Oliver Lodge (1851-1940) made significant contributions to the study of electrons, electromagnetic waves, X-rays, radio and telegraphy, earning him the Rumford Medal, the Faraday Medal and, in 1902, a knighthood. In addition to serving as President of the Physical Society, Lodge succeeded F. W. H. Myers as President of the Society for Psychical Research, an organisation devoted to the study of paranormal phenomena. In this work, first published in 1908, Lodge discusses the controversy between science and faith, showing how the self-sufficient laws of 'orthodox science' may be reconciled with the divinely ordered universe of 'orthodox religion'. Immensely popular from the moment of its publication, the book reached its twenty-first printing in 1928. This sixth edition of 1909 conveys the full scope of Lodge's ambitious project, including his treatments of evolutionary science, church reform and the immortality of the soul.

In 1889, a year after both he and Heinrich Hertz discovered electromagnetic waves and for the first time demonstrated the truth of Maxwell's great theory of the electromagnetic field, physicist Oliver Lodge (1851-1940) published his deepest reflections on the nature and meaning of electricity, how it originates, and its different manifestations. There had been great scientific advances - the work of Faraday and Maxwell, his own experiments and those of Hertz - and a revolution in technology. There were also puzzling questions. What is the connection between electricity and the ether that occupies space? How does electricity manifest itself in matter? Why does it come in fixed units? The discovery of the electron eight years later would offer crucial answers. Always lucid and direct, with a gift for making the difficult seem simple, Lodge engages the reader with his fascination for the subject, much as he did in his famous lectures.

Sir Oliver Lodge (1851-1940) was a physicist instrumental in the discovery of electromagnetic waves: the basis of today's radio and X-ray technology. He came from humble beginnings. After suffering at the hands of violent masters and schoolmates during his childhood, Lodge went on to teach physics and chemistry to young women at Bedford College in London. Later, he was appointed professor of physics at the University of Liverpool, and became known for his public lectures on a vast range of topics, from the comic faults of phonographs to the medical applications of X-rays. Whether seeing the cells of a voltaic battery in a pile of plates or appreciating the enunciation of Alexander Graham Bell, Lodge had a warm enthusiasm that shines through in this touching autobiography, first published in 1931. It remains ideal for general readers as well as students in the history of science.

In his study of optics, Newton postulated that light, like sound, must be carried through a medium, and that this medium must exist even in a vacuum. By the late nineteenth century, this theoretical substance was known as the luminiferous ether. But the ether theory faced several problems. If the earth moved through ether, there would be ether wind, and light travelling against the flow would move more slowly than light travelling with it. That was soon disproven. Nor could the ether be stationary: by 1905, Einstein's work on relativity had disproven absolute motion. In this fascinating advocacy of ether, first published in 1933, Sir Oliver Lodge (1851-1940) fiercely defends ether against the new physics, arguing for solid models over mathematical abstractions, and urging new ether experiments. With in-depth references to Einstein, Jeans and Eddington, this book is still relevant to students in the history of science.

Among the widely agreed facts of physics in the late nineteenth century was the existence of luminiferous ether: the medium through which light was thought to travel. Theorised to be a highly rarefied substance, the ether accounted for the movement of light, gravity and even heat across a vacuum. It also had great implications for spiritualism. Where thought was not proven to be a result of chemistry in the brain, the presence of ether allowed for the idea that cognition and emotion might exist independently of a physical body. First published in 1925, this monograph by the eminent physicist and ether advocate Sir Oliver Lodge (1851-1940) was written for the non-scientific reader. With a focus on straightforward explanations rather than mathematical theory, his book still represents a fascinating introduction to the topic today.

The discovery in 1897 of the electron, the first subatomic particle, led to rapid advances in our knowledge of atomic structure, the solid state, radioactivity and chemistry. It also raised major questions. Was the electron point-like or did it have structure? Was there a positive electron? What did the positive part of the atom look like? Did a hydrogen atom have one electron or a thousand? Published in 1906, this expository account by leading physicist Sir Oliver Lodge (1851-1940) examines the spectacular phenomena of cathode rays in evacuated tubes, the fixed units of charge observed in electrolysis, and the puzzling regularities in atomic spectra. Lodge knew most of the pioneers in the field, and his enthusiastic descriptions of their work and clear analyses of the problems as well as successes paint a vivid picture of the excitement of cutting-edge research and the scientific process in action.