Thomas Edison and Nikola Tesla were both scientists and inventors, yet they were worlds apart when it came to methods. Showcase the words of wisdom by Nikola Tesla with this quote on any of these gifts: "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." Perfect Tesla quote gifts for engineers, scientists, inventors, and all those who understand that a little theory and calculation can go a long way in terms of saved labor!