2990 risultati
1882rif. 51741Paris G. Masson 1882. Small 8vo. Orig. full decorated cloth. Gilt spine gilt covers. A paperlabel pasted on upper part of spine. A stamp on title-page. Frontispiece woodcut. 536 pp. and 186 woodcut illustrations in the text many full-page. Scattered faint brownspots. First edition. This exposition which took place in Paris 1881 was a great stir. The public could admire the dynamo of Zénobe Gramme the incandescent light bulbs of Thomas Edison the Théâtrophone the electric tramway of Werner von Siemens the telephone of Alexander Graham Bell an electrical distribution network by Marcel Deprez and an electric boat by Gustave Trouvé etc. etc. hardcover
1839rif. 42286London Richard and John E. Taylor 1839. 4to. No wrappers as extracted from "Philosophical Transactions" 1839 - Part I. Pp. 1-12. 1 textillustr. Some discolouring to the 2 first leaves. First appearance of this paper in which Faraday finds by experimenting with a species of Gymnotus a group of electric fishes one was send to him by Humboldt proves that its electricity is of the same nature as all other kinds of electricity "The skock in very varied circumstances of position was procured: the galvanonmets affected magnets were made a wire was heated polar chemical decomposition was effected and the spark obtained."Abstract.From 1831 to 1852 Michael Faraday published his "Experimental Researches in Electricity" in The Philosophical Transactions of the Royal Society. These papers contain not only an impressive series of experimental discoveries but also a collection of heterodox theoretical concepts on the nature of these phenomena expressed in terms of lines of forces and fields. He published 30 papers in all under this general title.They represents Faraday's most importent work are classics in both chemistry and physics and are the experimental foundations for Maxwell's electro-magnetic theory of light using Faraday's concepts of lines of force or tubes of magnetic and electrical forces. His many experiments on the effects of electricity and magnetism presented in these papers lead to the fundamental discoveries of 'induced electricity' the Farday current the electronic state of matter the identity of electricity from different sources equivalents in electro-chemical decomposition electrostatic induction hydro-electricity diamagnetism relation of gravity to electricity atmospheric magnetism and many other."Among experimental philosophers Faraday holds by universal consent the foremost place. The memoirs in which his discoveries are enshrined will never ceaseto be read with admiration and delight; and future generations will preserve with an affection not less enduring the personal records and familiar letters which recall the memory of his humble and unselfish spirit."Edmund Whittaker in A History of the Theories of Aether and Electricity. unknown
1842rif. 49135Leipzig Johann Ambrosius Barth 1842. No wrappers. In: In "Annalen der Physik und Chemie. Hrsg. von J.C. Poggendorff" Ergänzungsband Nach Bd. LI einzuschalten Stück 3. Pp. 385-528 a. 1 plate. Entire issue offered. Faraday's paper: pp. 385-405. Clean and fine. First appearance in German - prepared by Faraday himself for publication in Annalen - of this paper in which Faraday finds by experimenting with a species of Gymnotus a group of electric fishes one was send to him by Humboldt proves that its electricity is of the same nature as all other kinds of electricity "The skock in very varied circumstances of position was procured: the galvanonmets affected magnets were made a wire was heated polar chemical decomposition was effected and the spark obtained."Abstract. unknown
1753rif. 44319Paris Freres Guerin 1753. Small 8vo. Cont. full mottled calf. Top of spine with wear. Raised bands richly gilt spine. Some wear to titlelabels. Small tear to hinges at upper compartment hinges not loosening. Spine a little rubbed. Small loss of leather at at lower right corner of frontcover. XXIII444 pp. and 8 large folded engraved plates showing apparatus and experiments with electricity. Internally clean printed on good paper. From the library of le Comte de Caumia Baillenx "en son Chateau d'Andrain" and with his mongram blindtooled on both covers. In this work Nollet the discoverer of the theory of double flux describes among other experiments the famous experiments with the Leyden jar. "The author lay down a theory according to which the cause of electrical phenomena is the effluence and affluence of a subtile fluid which is everywhere present. Some interesting experiments are described with vacuum tubes also on the influence of electric charges on the growth of plants." Wheeler 355 but not listing this edition. - Poggendorff II:296."Nollet's system effluence and affluence was much superior to earlier theories of double flux. such as Moliere's or Hauksbee's. A cheif difficulty with them as with the theory of pulsating atmospheres had been to explain why attraction occurs first.follwed by contact and then repulsion. Nollet answered that the effluent and affluent flows differ not only in direction but in velocity and spatial distribution as well.The effluent stream consists of many jets each of which spreads out into a cone with apex at one of the scattered exit pores. The affluent current being a hodgepodge of differently directed effluent streams is approximately isotropic."Heilbron p. 284 hardcover
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