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...

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...

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...

The Dutch physicist Hendrik Antoon Lorentz (1853 1928) was educated at the University of Leiden, where he later became a Professor of Theoretical Physics. A leading figure in his field, he established the basic mathematical principles that were later used by Albert Einstein for his theory of relativity. Lorentz and his colleague Pieter Zeeman won the Nobel Prize in Physics in 1902 for their researches into the influence of magnetism upon radiation phenomena (the Zeeman effect). In 1905 Lorentz was also elected a Fellow of the Royal Society, which awarded him the Rumford and Copley Medals....

The Austrian physicist Ludwig Eduard Boltzmann (1844 1906), educated at the University of Vienna, was appointed professor of mathematical physics at the University of Graz in 1869 at the age of only twenty-five. Boltzmann did important work in the fields of statistical mechanics and statistical thermodynamics; for instance, he contributed to the kinetic theory concerned with molecular speeds in gas. Boltzmann also promoted atomic theory, which at the time was still highly controversial. He was a member of the Imperial Austrian Academy of Sciences from 1885 and became a member of the Royal...

The Austrian physicist Ludwig Eduard Boltzmann (1844 1906), educated at the University of Vienna, was appointed professor of mathematical physics at the University of Graz in 1869 at the age of only twenty-five. Boltzmann did important work in the fields of statistical mechanics and statistical thermodynamics; for instance, he contributed to the kinetic theory concerned with molecular speeds in gas. Boltzmann also promoted atomic theory, which at the time was still highly controversial. He was a member of the Imperial Austrian Academy of Sciences from 1885 and became a member of the Royal...

The Austrian physicist Ludwig Eduard Boltzmann (1844 1906), educated at the University of Vienna, was appointed professor of mathematical physics at the University of Graz in 1869 at the age of only twenty-five. Boltzmann did important work in the fields of statistical mechanics and statistical thermodynamics; for instance, he contributed to the kinetic theory concerned with molecular speeds in gas. Boltzmann also promoted atomic theory, which at the time was still highly controversial. He was a member of the Imperial Austrian Academy of Sciences from 1885 and became a member of the Royal...

Ernst Mach (1838 1916), the first scientist to study objects moving faster than the speed of sound, propounded a scientific philosophy which called for a strict adherence to observable data. He maintained that the sole purpose of scientific study is to provide the simplest possible description of detectable phenomena. In this work, first published in German in 1883 and here translated in 1893 by Thomas J. McCormack (1865 1932) from the 1888 second edition, Mach begins with a historical discussion of mechanical principles. He then proceeds to a critique of Newton's concept of 'absolute' space...

A distinguished mathematician and notable university teacher, Isaac Todhunter (1820 84) became known for the successful textbooks he produced as well as for a work ethic that was extraordinary, even by Victorian standards. A scholar who read all the major European languages, Todhunter was an open-minded man who admired George Boole and helped introduce the moral science examination at Cambridge. His many gifts enabled him to produce the histories of mathematical subjects which form his lasting memorial. First published between 1886 and 1893, the present work was the last of these. Edited and...

A distinguished mathematician and notable university teacher, Isaac Todhunter (1820 84) became known for the successful textbooks he produced as well as for a work ethic that was extraordinary, even by Victorian standards. A scholar who read all the major European languages, Todhunter was an open-minded man who admired George Boole and helped introduce the moral science examination at Cambridge. His many gifts enabled him to produce the histories of mathematical subjects which form his lasting memorial. First published between 1886 and 1893, the present work was the last of these. Edited and...