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Centrifuge in "World Book"



After perusing the article on centrifugal force in the Wold Book
Encyclopedia, I glanced at the centrifuge article. It says it "causes the
heavier liquid or the solid particles to move to the bottom of the
container, leaving the lighter substances on the top." Don't they have any
good scientists on their staff to proofread this stuff!

One wonders how any student can learn science when this sort of nonsense is
published in both the texts and the encyclopedias.

John M. Clement
Houston, TX