All Things by Weight.     The Foundation Years  
(1754 – 1837) 		All Things by Measure.

Understanding That ...

Nature Obeys Rules ...

Too !

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Serendipity alters the course of civilization: Oersted accidentally stumbles on electromagnetism during a private lecture to a group of students.

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The original telegraph receiver wasn't the familiar keyed system but actually printed dots and dashes on paper with a stylus.

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Two early frictional electrostatic machines. Franklin used the one on the right; the other was described by Priestley in his monumental book on electricity.

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Franklin proved that a spark generates heat. Discharge of the Leyden jar across the gap (F-G) raised the reading on the thermometer (a).

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The first battery: Volta's pile as drawn by Volta himself in a letter to the president of the Royal Society. Four variations are shown.

Based on the bicentennial issue of

Electronic Design
for engineers and engineering managers

Vol 24, number 4   Feb. 16, 1976
© 1976   Hayden Publishing Company Inc.
50 Essex St.   Rochelle Park, NJ   07662

Historical Time Line — Introduction

The Foundation Years   The Era of Giants   The Communications Era

The Vacuum Tube Era   The Transistor Era   The Integrated Circuit Era

AM Broadcast Basics
The Original Theory for Radio was Presented by James Clerk Maxwell in 1873.
Nikola Tesla was the first to patent a workable system.

Gravity   Site Link List   Crossed-Field AM Antenna  

Magnetism   Maxwell's Equations in Magnetic Media

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