He was director of the laboratory from 1946 to 1956.

Then you need an area of laboratory in which to do the work.

He stood at the far west end of his laboratory.

He was standing by the open door of the laboratory.

It worked well within the close range of the laboratory and between points in the city.

Suddenly Tom heard the door of the laboratory being opened.

I forced the front door of the laboratory, which he had never been able to open.

It brought him up to the level of the laboratories.

At that moment, the door of the laboratory opened and a man appeared.

But he wasn't lying on the floor of the laboratory.