where was the engineer you mentioned from?
Portland, Maine
Greenleaf Whittier Pickard
reenleaf Whittier Pickard (February 14, 1877, Portland, Maine
– January 8, 1956, Newton, Massachusetts) was a United States radio pioneer. 
where is silicon most commonly found on earth More than 90% of the Earth's crust is composed of silicate minerals when was it discovered? Due to the abundance of silicon in the Earth's crust, natural silicon-based materials had been used for thousands of years who developed the first si semiconductor device? Greenleaf Whittier Pickard when was this device developed? 1906 can you tell me some characteristics of this element? Its melting and boiling points of 1414 °C and 3265 °C respectively are the second-highest among all the metalloids and nonmetals, being only surpassed by boron. does it have any adverse effect on human body? UNANSWERABLE
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Greenleaf Whittier Pickard [SEP] Introduction
Greenleaf Whittier Pickard was named after his great-uncle, the American Quaker John Greenleaf Whittier (1807-1892). Pickard was president of the Institute of Radio Engineers in 1913.