Signalling Across Space Without Wires: Being a Description of the Work of Hertz and His SuccessorsCambridge University Press, 28 mars 2013 - 190 pages 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. |
Table des matières
ROYAL INSTITUTION LECTURE ON THE WORK | 1 |
INTRODUCTION | 5 |
Side Observations on the Eifect of Light on Electric | 9 |
NATURAL PRECIPITATION | 11 |
Physiological NonEffect 0f Sufliciently Rapid Alternations | 17 |
ARTIFICIAL PRECIPITATION | 21 |
Early Signalling over 40 or 60 yards 24 | 24 |
COMBINATION OF THE Two WITH SUGGESTED METEORO | 31 |
Summary of Various Detectors of Radiation 50 | 32 |
Experiments on Reflection Refraction and Polarisation | 42 |
APPLICATION OF HERTZ WAVES AND GOHERER | 45 |
A HISTORY OF THE COHERER PRINCIPLE 7387 | 88 |
PHOTOELECTRIC BEsEARcHEs 0F Dns ELSTER | 115 |
PHOTOELECTRIC RESEARCHES or PROFESSOR RIGHI | 127 |
Autres éditions - Tout afficher
Signalling Across Space Without Wires: Being a Description of the Work of ... Sir Oliver Lodge Affichage du livre entier - 1900 |
Signalling Across Space Without Wires: Being a Description of the Work of ... Sir Oliver Lodge Affichage d'extraits - 1894 |
Expressions et termes fréquents
action air-gap aluminium amalgamated apparatus arrangement atmosphere battery bell Branly carbon centimetre circuit coherer cohesion coil conducting conductor connected copper cylinder Daniell cell detecting detector discharge distance drops dust earth ebonite effect efiect electric radiation electric waves electrical influence electrical stimulus Electrician electrified electrodes electrometer electroscope emitter excited experiments extra current feeble field filings filings tube film find fine first flame galvanometer gases glass Hertz vibrator Hertz waves Hertzian waves illuminated impulses induction insulated J. J. Thomson jerks knobs Leyden jar light Lord Rayleigh magnetic mechanical mercury metallic filings method microphone millimetres mixture modification needle negative electricity observed ohms ordinary overflow photo-electric plate polarised potential powder precipitation pressure Prof receiver reflected relay resonator scientific sensitive substance signalling spark spark gap Specification sphere sufficient surface syntonic Tapper-back tapping back telegraphic terminals vacuum tube volts Voss machine Wheatstone bridge Wimshurst machine zinc