12/17/1885: "Am setting up the circles for computing the different lines of etheric chords, used in setting up the vibratory conditions to obtain continuity. My chief trouble is in chording up the masses of the different parts composing the negative centers in the inner one-third volume. This neutral center is only established free from influences of gravity when rotating at 100 revolutions per minute, with the vibratory circuit running at 100,000 per second. January should complete the sympathetic graduation." [Snell Manuscript]
See Also
Graduation
GRADUATION OF MACHINES
GRADUATION OF SYMPATHETIC MACHINERY