https://www.youtube.com/watch?v=bBhVDcZwAls

Could the reversal of current, relative to the polarity of voltage within his Magnifying Transmitter, be a diagnostic check that his Magnifying Transmitter was succeeding at doing its job of collecting atmospheric electricity? In as much as, this reversal of current would be directing the flow of charges into his device (from the atmosphere) in contradistinction, and in counter-opposition, to conventional devices which dissipate their potential to do work since their current is in phase with their voltage with little or no separation of their phase relations (at least no separation greater than plus or minus one-quarter cycle of oscillations), and -thus- behave in an entropic manner?

Also to consider, is the fact that his Magnifying Transmitter was orienting its potential in a radial manner, rather than in a circulating manner, since it possessed no return path (it was a monopolar device). Thus, reversal of its current (if this had been the case) would have directed potential inwardly towards itself in the format of a flow of current directed inwardly from the surrounding environment?

Also, it sounds like a verification that the Ammann brothers' so-called: "Atmospheric Generator" may have been patterned off of Tesla's Magnifying Transmitter? Now that I've watched this video, this seems more likely than ever before since I've already considered the possibility that they were using one of his patents for their inspiration. But now, it seems very likely!

In further confirmation...
It was claimed, by authorities in Washington, D.C., that upon the arrival of C. Earl Ammann with his batteryless EV to demonstrate his technology for the benefit of the U.S. Patent Office, he was promptly arrested on charges of "stealing energy from the grid" since his demonstration in Denver, Colorado, in August of 1921 (prior to his arrival in Washington) had the distinct side-effect of putting out the power of the grid's customers in the outskirts of downtown Denver (yet, not within downtown Denver, itself). I suspect that he was messing with the phase relations of the grid across the radius of influence of his device (which he has been quoted as saying that it had a ten-mile broadcast radius). So, I'm guessing that he wasn't stealing energy from the grid so much as he was disturbing it throughout its radius of influence while at the same time supplying it with reversed polarity of the flow of energy towards the center of this range of influence at the location of his device. So, at the outskirts of this circle of influence, his device was too weak to have any influence other than that of disturbing the phase angle (or, power factor) of the grid without being strong enough to suck any current through the grid (and from the atmosphere) towards his device at this periphery of its range of influence. Thus, a more accurate assessment would be to claim that he was a domestic terrorist (if we would have created that term back then) and a Robin Hood of sorts!