Flour pouring as a lung-function test
A test for asthma involving a patient whoe works in an industrial bakery pouring baking flour from tray to tray in a sealed room with all the body except the face covered. Lung function is measured to quantify loss of capacity.
Copyright © James King-Holmes
Photo size: 17.6 Mpixels (50.5 MB uncompressed) - 3786x4660 pixels (12.6x15.5 in / 32.1x39.5 cm at 300 ppi)