780Ch4105: Double-head recording and indicating instrument designed for use in connection with the Parshall measuring flume

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http://hdl.handle.net/10217/176988
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Abstract
Drum case to left of recorder. Title information from "The Parshall Measuring Flume" by Ralph L. Parshall. See Figure 28.
Creator(s)
Unidentified photographer

Date
1936?
Format
photographs; negatives (photographs)
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