What type of details about temistocle calzecchi-onesti can be gathered from the following bio? Bio: temistocle calzecchi onesti -lrb- december 14 , 1853 -- november 25 , 1922 -rrb- was an italian physicist and inventor born in lapedona , italy , where his father , icilio calzecchi , a medical doctor from nearby monterubbiano , was temporarily working at the time . his mother , angela , was the last descendant of the ancient and noble onesti family . his first name is the italian version of the athenian general themistocles . calzecchi demonstrated in experiments in 1884 through 1886 that iron filings contained in an insulating tube will conduct an electric current under the action of an electromagnetic wave . this discovery was the operating principle behind an early radio wave detector device called the coherer , developed about 6 -- 10 years later by oliver lodge , edouard branly , and guglielmo marconi , which was influential in the development of radio .
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