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Mr. Sandman: Silica and Sleep

  Mr. Sandman: Silica and Sleep A popular song recorded in 1954¹ begins with, "Mr. Sandman, bring me a dream." An old nursery rhyme says, "The Sandman's coming in his train of cars / With moonbeam windows and with wheels of stars." Both of these verses are about the mythical Sandman of folklore in Northern Europe. The imaginary Sandman caused people to sleep, then sprinkled magical sand on them to bring good dreams. The "sand" in the stories refers to grainy particles most people have in...

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