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Opening the valve into the wind of an evacuated glass flask while the observer holds his breath to keep from contaminating the sample. Picture

Opening the valve into the wind of an evacuated glass flask while the observer holds his breath to keep from contaminating the sample.

Opening the valve into the wind of an evacuated glass flask while the observer holds his breath to keep from contaminating the sample.

Photo Category: Observatory - Mauna Loa - Clean Air Facility
Photo Location: Mauna Loa, Hawaii
Photo Date: 1982 February

Author: Commander John Bortniak, NOAA Corps (ret.)/ NOAA

License: Public Domain Mark 1.0 (Public domain)
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20th October 2015
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