Word: dead-end
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...Stevenson rat is impervious to all such lures and hindrances. Resembling a three-wheeled roller skate loaded with small motors, electromagnets and switches, the robot is set on a track containing twelve forks at each of which a wrong turn leads to a dead-end. The robot is first set to take the turn to the right at every fork. When this proves to be wrong and results in a bump against the dead-end, the "rat" goes into reverse, backs up past the fork, goes forward again, taking the correct left turn. This resets the controls in such...
...they would if they were fishermen or golfers or chess players. He scoffs at the typical test for an operator's license, in which a bored policeman rides slowly around the block with the candidate, who meets no emergency and performs nothing more difficult than turning around in a dead-end street or backing into a parking space. Laboratory tests would compel the candidate to demonstrate ability to cope with all sorts of situations, would eliminate as factors the strictness or leniency of the examining officer. Finally, Dr. DeSilva urges that laboratory equipment helps beginners learn in safety and provides...
...families at an average of $11 per room per month. Designed by Architect Clarence S. Stein, who built a famed model colony at Radburn, N. J., the Hillside community's buildings occupy only 34% of their 697,000 sq. ft. site. There is a 2½-acre playground. Dead-end streets, footpaths and an underpass to the school across an arterial highway from the development safeguard children. Most of the buildings will be four-story walk-ups. Some will be six stories high, have self-operated elevators...