It is indeed "one of the most productive scientific instruments in history."

For him, the appeal lay in wearing a scientific instrument.

It has seven parts and each part is assigned to a different scientific instrument.

To make ends meet, he works one day a week at a company that makes scientific instruments.

I've been saving like mad to buy a special scientific instrument.

But the two television cameras and other scientific instruments were said to be ready.

The assorted scientific instruments they took were more to the point.

Ball also built two of the three scientific instruments on the observatory.

They were considered to be among the best scientific instruments in Germany.

But even the best scientific instruments can detect no less than 10 to 20 parts per billion.