Thus any use of pesticides should only be undertaken after thorough understanding of residual toxicities upon soil organisms as well as terrestrial ecological components.

It is not the purpose of this chapter to provide a comprehensive survey of the empirical work undertaken upon this topic.

A division of the assembly is often undertaken upon a motion.

By this time, however, Gateshead Fell had become a place of considerable notoriety, both for the bleakness of the land and for the criminality undertaken upon it.

The amphitheater, off the lobby, holds Rivera's first mural, La Creación, undertaken upon his return from Europe in 1923.

Repeated experiments, undertaken upon the insistence of skeptical friends and co-workers, yield the same result.

At the sight Adam's heart fell; the danger of the desperate enterprise which he had undertaken burst upon him.

I remember that during the whole of that memorable day he lost himself in a monograph which he had undertaken upon the Polyphonic Motets of Lassus.

All such activities shall be undertaken only upon authorization of the President of Liberia with the consent of the Legislature.

The Hatteras Expedition was undertaken upon suggestions and information given to the Department by him, for which he was thanked by the Secretary of the Navy.