acid test

Her lines were read, not recited; and Shaw is the acid test for the amateur.

One is known as the "acid test" and the other the "rennet test."

This then is your ideal kit for it has withstood the acid test of experience.

I have submitted that water-district plan to the acid test, Colonel.

Their behaviour on that point would be the acid test of sincerity.

He handled the Sunday excursions, which was the acid test of a trainmans grit.

The acid test is: "Will your system fit the president's office?"

Will it not be an acid test applied to our alleged democratic institutions?

Like the dying––or the reborn––Northrup put his loved ones to the acid test.

The acid test of the union is its capacity to live up to this trade agreement.