In the determination of the pressure and velocity distributions in the oceans, very little use has heretofore been made of the observations of sea level available from the many permanent tidal stations. Insofar as the tidal stations have been interconnected by accurate leveling surveys, such observations would aid in the determination of absolute pressure and velocity distributions....
Montgomery, R. B.. 1938. "Fluctuations in monthly sea level on eastern U.S. coast as related to dynamics of western North Atlantic Ocean." Journal of Marine Research 1, (2). https://elischolar.library.yale.edu/journal_of_marine_research/527