pl23_cgs01646.jpg
![View of back side of tide-prediction machine No cgs01646.jpg View of back side of tide-prediction machine No](https://s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_cgs01646.jpg)
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https://www.noaa.gov/media/digital-library-photo/pl23cgs01646jpgDescription
View of back side of tide-prediction machine No. 1, the Ferrel tide-predictionmachine.
Location
Washington, D.C.
Category
Historic Coast & Geodetic Survey