You must be ready to give up even the most attractive ideas when experiment shows them to be wrong..

Each metal has a certain power, which is different from metal to metal, of setting the electric fluid in motion..

I continue coupling a plate of silver with one of zinc, and always in the same order... and place between each of these couples a moistened disk. I c….

What is it possible to do well, in physics particularly, if things are not reduced to degrees and measures?.