pl23_fish9572.jpg
![Frank Hester of the Tuna Research Laboratory preparing the alphameter fish9572.jpg Frank Hester of the Tuna Research Laboratory preparing the alphameter](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_fish9572.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23fish9572jpgDescription
Frank Hester of the Tuna Research Laboratory preparing the alphameter.
Credit
NOAA Central Library Historical Fisheries Collection
Collection
Historic Fisheries