21.   The second exchanger would use some liquid hydrogen fuel to further cool the air, which would then be centrifuged to separate out the oxygen.

22.   This method allowed them to separate out the effects of income on the kind of care received.

23.   When Svanborg initially prepared milk to pour over cells, she added acid to the solution, hoping to separate out the microbe blockers.

24.   Like panning for gold, volunteers separate out anything bigger than a cherry pit with sifting pans.

25.   Many counties planned to run all their ballots through the counting machines to separate out those with no machine-readable presidential vote.

26.   The inability to separate out extremist Hutu elements from genuine refugees turned the camps into a flash point between the Rwandan and Zairian governments.

27.   They would take the material to the edge of the river and try to separate out small particles of gold using wood-frame sieves and pans.

28.   Then another sticky chemical marker has to be used to separate out those strands that have a particular word in the second position.

29.   They would take the material to the edge of the Cauca River and using wood-framed sieves and pans, try to separate out small particles of gold.

30.   From the dumps their homes are built on they separate out fabrics, glass, plastic and metals for sale.