Other technologies have been proved in field tests.
In field tests, its air bags, meant to cushion the fall, exploded at touchdown.
He has tried his method in field tests to detect buried antitank mines.
While the spray is commercially available, the latter two are currently in field tests.
Curators swear that children as young as 10 have understood the exhibit in field tests, but trained "Einstein explainers" hover to help anyone who looks befuddled.
To prepare the math exam properly, 1,500 students should have been sampled in field tests, the panel said; only 250 were.
In field tests, Mr. King said, a windstorm arose when the grass had been cut and was drying in the field, dispersing seeds.
In field tests last summer, the plant's deep taproots seemed to pull heavy metal contaminants like mercury and lead from the garden's polluted soil.
Christine C. Quinn, the City Council speaker, said she would work with state and city lawmakers to end the city's participation in field tests.
The supposed drugs tested positive in field tests after the arrests, they said, but more sophisticated testing done later in preparation for trial found no more than traces of drugs.
In field tests in an African village, the pungent aroma attracted four times as many mosquitoes that can carry malaria than were drawn to people sleeping under bed nets in neighbouring homes.
