Democratic Sentinel, Volume 18, Number 15, Rensselaer, Jasper County, 27 April 1894 — Dust Particles in the Air. [ARTICLE]

Dust Particles in the Air.

The atmosphere is at all times charged with dust particles to a degree difficult to realize. The most pure air tested by Professor Atkins previous to his celebrated experiments at the Observatory at Ben Nevis, contained about 94,000 such particles to the cubic inch, which would give 85,232,000 particles to every cubic foot, or 85,232,000,000 tb a horizontal column of such air extending but 1,000 feet high. It would be interesting to see a calculation on the number of deadly# microbes in the same proportion of “the air” we breathe.—[St. Louis Republic.