The experiments described in this paper were carried out by the author before his death in an airplane crash near Guadalajara, Mexico, 2 June 1958. We had planned to collaborate in studying the results from the standpoint of possible model similarity between events in the experimental tank and in the ocean, possibly repeating some of the experiments or devising new ones. But I was unable to find many of the pertinent numerical data in Mr. Cromwell's files.
Cromwell, Townsend. 1960. "Pycnoclines created by mixing in an aquarium tank." Journal of Marine Research 18, (2). https://elischolar.library.yale.edu/journal_of_marine_research/947