These were questions he would have to answer by experiment.

The issue is how to determine the value of B by experiment.

What we've tried to do at the museum is find projects that will help people understand, learn by experiment and experience.

This attractive model has come into question by recent experiments.

"There is only one way to find out - by experiment."

Only by experiment and observation can we learn something about the nature of the race.

I knew by experiment that on a dark night you can never see a man at twenty paces.

"Of course, the only way to test them definitively is by actual experiment."

Presently, by experiment, he realized the instrument had been cut off completely.

Henry was appointed to this post in 1938, and began to learn about market research, largely by experiment.