Search Results: untersuchungen ueber die ausbreitung der elektrischen by hertz heinrich

Leipzig: Johann Ambrosius Barth. 1892. First Edition. Three-quarter leather. Ex-library copy, bookplate and ink stamps on the endpapers. Catalog number written on a front blank page. Rebound, no lettering appears on the spine or covers. Wear to the leather outer corners of covers. Text clean and tight. ; German text. .

Leipzig: Johann Ambrosius Barth, 1892. Boards. Very Good. VI, [2], 295, [1] pages. 8vo. Half leather over marbled boards. Minor wear and scuffing to the leather extremities, front joint just starting at top. Bright and clean internally. Boards. 'This discovery and its demonstration led directly to radio communications, television and radar.' This volume collects and reprints papers on electrical waves first published between 1887-1890 in Annalen der Physik und Chemie. Includes explanatory notes and Hertz's 31 page introduction. Hertz produced experimental proof of Faraday and Maxwell's hypothesis that 'electrical waves can be projected through space...' starting in 1887. 'By inducing the waves to produce an electric spark at a distance, with no apparent connexion between the oscillator and the spark gap, and by moving the sparking apparatus so that the length of the spark varied, [Hertz] proved beyond question the passage of electric waves through space...J. J. Thomson described the results as… Read More

1892. Leipzig, Johann Ambrosius Barth, 1892. 8vo. Contemporary half cloth. VI, (2), 295, (1) pp. Upper part of joints neatly repaired,otherwise a clean and fresh copy. First edition of Hertz' seminal book on electromagnetic waves, which laid the foundation of radiotelegraphy and radiotelephony.While investigating Maxwell's conception of light as an electromagnetic phenomenon, Hertz exposed that waves of electricity could both be transmitted and received through space. This had profound consequences and led, amongst other things, to Marconi's perfection of wireless telegraphy. "His [Hertz'] discovery of the properties of reflection, refraction, and polarization in electricity, with this wave theory of electrical motion, laid the foundation of radiotelegraphy and radiotelephony." (Milestones of Science, p 47.)"Experimental proof by Hertz of the Faraday-Maxwell hypothesis that electrical waves can be projected through space was begun in 1887, eight years after Maxwell's death. The two main… Read More

Leipzig: Johann Ambrosius Barth, 1892. Untersuchungen über die Ausbreitung der elektrischen Kraft. Leipzig: Johann Ambrosius Barth, 1892. First edition. Octavo (8 7/8 x 5 5/8 inches; 225 x 145 mm). pp. vi, [2], 295, [1] pp. Engraved illustrations and diagrams in the text. With original orange front and back wrappers bound in. Tipped in to the front is an ALS to "Colleague" signed Robert Watson-Watt and dated 12/10/68. The letter thanks the colleague for the opportunity to read their First Edition copy of Hertz's book and mentions that Hertz was a "Great inspiration to my efforts in relation to Radio and to 'Direction Finding'- later to be called Radar." In original orange wrappers, bound within modern half morocco over marbled boards. Spine with black calf spine label, lettered in gilt. Top edges red, others uncut. Wrappers with some rubbing and wear. Previous owner's old ink signature on front wrapper and title-page. Overall, a very attractive copy in the original wrappers and a nice modern… Read More