Therefore archaeologists are rarely able to make any particularly useful discoveries during archaeological excavations.

And here I had not a little hope of useful discoveries.

He described how difficult it was to interest his seniors in this useful discovery.

They happened upon a dangerous and useful discovery.

The discovery, though useful, presented another problem to physicists: We don't know why high-temperature superconductors work.

The young people were behaving circumspectly and Vielle himself had made a useful discovery.

One useful discovery made from the research of microspheres is a way to fight cancer on a molecular level.

He was for ever lurking around the turret-rooms on the chance of making some useful discovery.

As it chanced, too, we were rewarded by sundry useful discoveries.

No, no: scruples are kept for natural philosophy alone, or any useful discovery.