"Gaging the thirst of the air." The observer is measuring the depth of water in
the evaporation pan with a graduated glass tube (burette.)
In: "The Realm of the Air" by Charles F. Talman, 1931. Library Call Number
M/0030 T151r.
Image ID: wea01170, NOAA's National Weather Service (NWS) Collection Photo Date: 1925 circa Credit: U. S. Forest Service
