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Ron Stone
self-employed content developer
self-employed content developer
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photographs imaged Saturday, one day after the Mavericks.
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2/18/16
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turtles 
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view to San Francisco and the Farallon Islands
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view of the North Peak and the Sierra Nevada's
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The concept for the electron microscope originated in 1931 with German physicist Ernst Ruska and electrical engineer Max Knoll, but their prototype only achieved 400 times magnification. Later, James Hillier and Albert Prebus adapted Ruska and Knoll’s work and achieved 7,000 times magnification. In 1939, Vladimir Zworykin started the electron microscope program at RCA. They built the first model to reach a milestone magnification of 100,000 times. It measured 3 meters (10 feet) high and weighed approximately 453 kg (~1,000 lbs). They demonstrated the device in Philadelphia in April 1940
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the first images of less than 120 s of Bald Eagle imaging in the California SF East Bay.
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4/11/17
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view toward Lick Observatory, Mt Diablo State Park, California USA
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Golden Gate eclipsed by Redwood Peak. Mt Diablo State Park, California USA
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view of wind turbines near the Altamont Pass. Mt Diablo State Park, California USA 
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trail to the North Peak, Mt Diablo State Park, California USA 
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