21.   The glove is undergoing sophisticated DNA tests in a Germantown, Md. laboratory to determine the source of the blood.

22.   The hope is that additional information will help determine the source of money when a group of co-workers all contribute at the same time.

23.   The officials said they were still trying to determine the source of both the carbon monoxide and the natural gas.

24.   The test, conducted at Fort Hood in Killeen, Texas, in March, was designed to determine the source of flashes that appear on FBI videotapes.

25.   They have not determined a source of the parasite, but they are hopeful.

26.   They measured the heights of mountain passes, determined the sources of rivers, produced detailed maps and took valuable photographs.

27.   Work has already started in New Jersey to try to determine the source of the anthrax sent to NBC.

28.   You may have to remove a small piece of siding to see what is going on inside that wall to determine the source of the moisture.

29.   Postal officials have been examining video surveillance tapes to try to determine the source of the letters, which bear Trenton, New Jersey, postmarks.

30.   Pitcher Seth Greisinger was examined this week by Dr. James Andrews to help determine the source of discomfort in his right elbow.