"...it may be stated that the force named in this paper Apergy, known to the ancients, and rediscovered by Keely, will hereafter be given the appropriate title of Keel, after the name of its latest discoverer." [Bloomfield-Moore, Some Truths about Keely]
Apergy: The reverse counterpart of gravitation; see Review of "A Journey in Other Worlds," by John Jacob Astor IV.
Collected mentions of "apergy" in literature: https://en.wikipedia.org/wiki/Anti-gravity#Apergy
Apergy - Power Without Cost
Keely - Electricity from Space
Rhythmic Balanced Interchange
Universal Heart Beat