The author conducts various reproducible experiments at several gravitational mystery spots and draws some surprising conclusions.
The following catalog of anomalous vortex sites contains descriptive data in a systematic format listed for each site. In several cases complete data for all sites is not currently available (as of January, 1998; unverified data compiled from Banta and Vogt). Further bibliographic research and site discovery, description, analysis, experimentation and reporting is encouraged.