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Heinrich Hertz's experiments of electromagnetic waves: demonstration proves James Clerk Maxwell's contention that a metallic surface should reflect electromagnetic waves
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Heinrich Hertz's experiments of electromagnetic wa...

Heinrich Hertz's oscillator and reflecting metal sheets to show outward and return paths of electromagnetic
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Heinrich Hertz's oscillator and reflecting metal s...

Clerks at the Railway Clearing House
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Clerks at the Railway Clearing House

Heinrich Hertz's oscillator, right, and reflecting metal sheet left, showing the outward and return paths of reflected wave
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Heinrich Hertz's oscillator, right, and reflecting...

Heinrich Hertz's oscillator, right, showing path of wave reflected from metal surface at left
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Heinrich Hertz's oscillator, right, showing path o...

Heinrich Hertz's oscillator and reflecting metal sheets to show outward and return paths of electromagnetic
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Heinrich Hertz's oscillator and reflecting metal s...

Heinrich Hertz's oscillator and reflecting metal sheets to show outward and return paths of electromagnetic
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Heinrich Hertz's oscillator and reflecting metal s...

Heinrich Hertz's oscillator
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Heinrich Hertz's oscillator

Heinrich Hertz's resonator, a nearly closed 210cm wire circle, one end pointed and the other ending in a ball, and mounted on a wooden stand
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Heinrich Hertz's resonator, a nearly closed 210cm ...

Advert for recruitment of soldiers for the British army
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Advert for recruitment of soldiers for the British...

Assembly of the Provostship of the Merchants of Paris
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Assembly of the Provostship of the Merchants of Pa...

New York City, A hot day in Wall Street, 1873
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New York City, A hot day in Wall Street, 1873

James Clerk Maxwell's
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James Clerk Maxwell's

James Clerk Maxwell
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James Clerk Maxwell

James Clerk Maxwell
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James Clerk Maxwell

Jules Pierre Cesar Janssen French astronomer
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Jules Pierre Cesar Janssen French astronomer

Assemblée de la Prévôté des Marchands de Paris
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Assemblée de la Prévôté des Marchands de Paris

Un marchand et son employé
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Un marchand et son employé

William Shakespeare "Much Ado About Nothing", play first performed c1598
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William Shakespeare "Much Ado About Nothing", play...

Employe de bureau utilisant la machine arithmetique de Pascal (1623-1664)
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Employe de bureau utilisant la machine arithmetiqu...