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Experiments made by Doctor Aiken indicate that there is no dustless at mos here. Air with less than 100 particles of dust per cuble centimeter is rarely found. In most country places the numbers rise to thousands and in cities to as high as 100,000 to 150,000 particles per cuble centimeter
Newspaper Details
Perry Daily Journal
Perry, Oklahoma, US
Thu, Jul 22, 1926
Page 2
Full Page
Clipped by
Anonymous
USA 16 Feb 2026
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