“Genius is one percent inspiration and ninety-nine percent perspiration.”
Thomas Edison
“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 percent of his labor.”
Nikola Tesla
https://creativecreativity.com/2007/10/16/tesla-and-ediso/
I would simply have used a big magnet..............