"Measuring the dust in the air" a thousand feet above the earth with an Owens
dust-counter from an open cock-pit aircraft.
In: "The Realm of the Air" by Charles F. Talman, 1931. Library Call Number
Library Call Number M/0030 T151r.
Image ID: wea01423, NOAA's National Weather Service (NWS) Collection Credit: U. S. Department of Agriculture
