Thomas Edison tried two thousand different materials in search of a filament for
the light bulb. When none worked satisfactorily, his assistant complained,
“All our work is in vain. We have learned nothing.”
Edison replied very confidently, “Oh, we have come a long way and we have
learned a lot. We now know that there are two thousand elements which we
cannot use to make a good light bulb.”
the light bulb. When none worked satisfactorily, his assistant complained,
“All our work is in vain. We have learned nothing.”
Edison replied very confidently, “Oh, we have come a long way and we have
learned a lot. We now know that there are two thousand elements which we
cannot use to make a good light bulb.”
No comments:
Post a Comment