A Journey in Other Worlds
Published [1894]
John Jacob Astor

https://en.m.wikipedia.org/wiki/John_Jacob_Astor_IV

https://en.m.wikipedia.org/wiki/Nikola_Tesla

https://en.m.wikipedia.org/wiki/John_G._Trump

John Jacob Astor was Tesla's wealthiest and most generous investor.

When legendary physicist Nikola Tesla died in 1943, Professor John G. Trump was asked by the FBI to examine Tesla's papers and equipment.
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Hydrogen

"Force superheated steam," replied the spirit, "through an intensely heated substance, as you now do in making water-gas—preferably platinum heated by electricity—apply an apergetic shock, and the oxygen and hydrogen will separate like oil and water, the oxygen being so much the heavier. Lead them in different directions as fast as the water is decomposed—since otherwise they would reunite—and your supply of power will be inexhaustible."

The impression on the plate, however, like the prismatic colours you have already noticed, can be produced by a slight rarefaction of the hydrogen in the air, so that, though no spirit could be photographed as such, a code and language might be established by means of the effect produced on the air by the spirit's mind.

Bearwarden and Ayrault immediately set about combining the chemicals that were to produce the force necessary to repel them from Saturn. Bubbles of hydrogen were given off from the lead and zinc plates, and the viscous primary batteries quickly had the wires passing through a vacuum at a white heat.

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Annie Besant worked with psychic C. W. Lead-beater on an imaginative study to describe the structure of atoms. In this early research at the English Theosophical Society, Leadbeater was the first person in the world to describe the distinctive nuclear structure of the three isotopes of hydrogen.

In his book Occult Chemistry, published in 1898, he described clairvoyantly seeing that, in paraffin, a given atom of hydrogen could have one, two, or three particles in its nucleus and still be hydrogen. Isotopes had not yet been discovered by chemists, Leadbeater was the first to report that atoms of different atomic weights could retain their chemical identity.