Ascertain whether they are safe or not.

In 1778, it was calculated to be about ten millions; and, by an enumeration made in 1787, the population was ascertained to be 10,409,879; and Boetticher, in his Statistical Accounts, states the population at 11 millions.

Herod, seeing that he had been tricked by the wise men, was so enraged that he sent and killed all the boys who were in Bethlehem, and in all the region around it, two years old and under, according to the time which he had ascertained from the wise men.

He had entertained hopes of being admitted to a sight of the young ladies, of whose beauty he had heard much; but he saw only the father. The ladies were somewhat more fortunate, for they had the advantage of ascertaining from an upper window that he wore a blue coat, and rode a black horse.

So late as 1610, Galileo, a Florentine, discovered and introduced the use of telescopes, and by applying them to observe the motions and appearances of the heavenly bodies, afforded additional means for ascertaining the true structure of the universe.

The readers cannot ascertain whether the news is true or not.

We ascertained that the people of Vileika are known for their hospitality for a good reason.

I'm going to ascertain the truth of his statement.

We will first ascertain the cause of the disaster.

The prince’s official London residence, Clarence House, issued a statement saying it was impossible to ascertain where he caught the virus, owing to the high number of engagements he carried out in his public role during recent weeks.