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Tide indicator display indicating slack water.
Tide indicator mechanism of the tide indicator at the Maritime Exchang...
Graphical output from the first operationally deployed Roberts Radio C...
Towing a Roberts Radio Current Meter buoy to its planned station site...
"Counting the clicks." The number of clicks heard in a given time was...
Roberts Radio Current Meter woes being attended to in the Gulf Stream
Oceanographer Michael Slapsys launching a drift bottle from the USC&GS...
Oceanographer Michael Slapsys launching a drift bottle from the USC&GS...
Card enclosed in drift bottle directing finder to break the bottle.
Harris B
Ensign George Maul inspecting Roberts Radio Current Meter on board USC...
Dr
Current buoy in Charleston Harbor
Current float with drogue being readied for deployment.
Tide gage workings
Tides at Rincon Point San Francisco January and February 1853
Tide gauge, date unknown.
Clarence E
Clarence E
Clarence E
Clarence E
Tower built over Triangulation Station Kipnuk
View looking due west from the triangulation station
View looking due east from the triangulation station
Meades Ranch Reference Mark No
First
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