Many experiments also need permission from a national regulatory group.

"That's why every experiment needs a control," she said.

The experiments need to be repeated, with modifications based on all we have learned in the succeeding years.

The experiment of the big, squadron-size raid needed some work.

By the fall of 1938, Carlson's wife had convinced him that his experiments needed to be conducted elsewhere.

The new experiment will need even broader regulatory exemptions to proceed.

Only a few such experiments will now need permits from the Government.

"If your experiment needs statistics, you ought to have done a better experiment."

These experiments are difficult and will need to be confirmed.

Any experiment will need to be adjusted to fit your specific situation.