51.   Preliminary tests in at least two of the cities indicated that the letters did not contain the virus.

52.   Preliminary tests in that case pointed to cyanide poisoning because cyanide was found in the blood of one of the men who died and in various samples of vomit.

53.   Preliminary test results show the two others exposed to the letter also tested negative for airborne anthrax.

54.   Preliminary tests apparently revealed no heart attack, and early in the morning he felt well enough to speak to Bush.

55.   Preliminary tests had seemed to indicate the presence of spores.

56.   Preliminary tests on Wednesday also found anthrax spores in a Postal Service stamp-processing building in Kansas City, Mo., officials announced there.

57.   Preliminary pathological tests indicate a good outlook.

58.   Preliminary tests also demonstrated the protein helps diabetic mice reduce their serum glucose and insulin levels to normal amounts.

59.   Preliminary tests have confirmed that the liquid contained bacteria, she said.