This is followed by experimental proof, to general surprise.

This was the first experimental proof that an enzyme is a protein, a controversial question at the time.

However, in both cases the experimental proof was neither complete nor conclusive.

Wiener is known for the experimental proof of standing light waves.

But he had no experimental proof of his notion.

No one really doubted it, but it's nice to have the experimental proof.

The medical establishment completely rejected the new "science" for lack of experimental proof.

Most important was their experimental proof of an effective neutron increase in April 1942.

History is a realm that does not allow experimental proofs.

Further experimental proof for the existence of the Efimov state has been given recently by independent groups.