토머스 에디슨: 두 판 사이의 차이

*: {{llang|en|If Edison had a needle to find in a haystack, he would proceed at once with the diligence of the bee to examine straw after straw until he found the object of his search. [...] I was a sorry witness of such doings, knowing that a little theory and calculation would have saved him ninety per cent of his labor.}}

 

{{위키백과}}

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{{기본정렬:에디슨, 토머스}}

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