51.   Last week, two more tests proved positive, and more examinations are under way.

52.   Ms. Reiter said she was hopeful that the toilet tests would prove successful, at least in some places some of the time.

53.   Officials announced recently that the tests proved negative.

54.   On Monday, a second test proved positive.

55.   On Wednesday, his lawyer announced that recent DNA tests prove Salazar was wrongly convicted.

56.   Overall, he contended, the test proves that the X-band radar works.

57.   Police arrested him and he sat in jail for nine months, unable to post bail until this week, when DNA tests proved he was not the rapist.

58.   Pollock, who examined Maturino Resendiz for three days in October, said the Mexican national was schizophrenic, but tests did not prove he was a psychopath.

59.   Police said the tests proved negative.

60.   Possible contamination of the water supply led to a citywide cutoff until laboratory tests prove the water was safe.