Mike(Mont) said:
Huh? Let me get this straight: A device that reacts to electric field gradient can only do so if it not an L-rod? Okay, I think I get it

?? Gravity only works if the detector is not in a jar--no human is capable of sensing a force field by using an L-rod because gravity overpowers it? Are you suggesting the L-rod can detect gravity from the target? I seriously doubt this being that gravity is the weakest known force. But hey, I have an open mind. Please explain.
The versorium has a very lightweight and
balanced vane that is mounted on (or suspended from) a very low-friction pivot. And it's in a jar so that air currents do not affect it. Therefore, it can respond to electric fields.
Have you ever noticed that a needle compass has a balanced needle mounted on a low-friction pivot? What do you think will happen if you snip off one end of the needle, just shy of the pivot? Do you think it will still align with Earth's magnetic field? Why, you don't have to believe what will happen, you can actually try it, and know. A case where an 10 minutes in the lab beats 10 hours reading nutty pseudoscience books.
An L-rod is unbalanced, heavy, and held in a hand that is unsteady. It will easily follow gravity when the hand is moved even slightly. Do you think a hand-held L-rod will respond to a static electric field? How about an L-rod made of steel... will it align with Earth's magnetic field? Another 10 minutes of lab time and you can know, instead of believe.
- Carl
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Hi Carl, I agree with you in this case.
Don Jose de La Mancha