"December 17, 1885. "The setting up of the circles for computing the different lines of etheric chords, in setting the vibratory conditions for continuity requires costly study. I feel convinced that ... perfect solution ... will follow when this ... has been completed ... I find my chief trouble in chording up the masses of the different parts composing the negative centers. The negative center is included in the one-third volume of shell or sphere, starting from the neutral axis or point of suspension. This point of suspension only becomes perfect when the rotation is established on the sphere. One hundred revolutions per minute is all the velocity required to neutralize the gravity of the central third with the velocity of the vibratory circuit at one hundred thousand per second ... The month of January (1886) ought to find all completed ready for sympathetic graduation..."" [KEELYS THREE SYSTEMS - Snell]
See Also
center
centers of negative and attractive focalization
negative