Crossword-Solution: PHOTIC 6 letters, 2 clues 🏆 scrabble score: 13

But Roland Clewe had come to believe in the existence of a photic force, somewhat similar to the cathode ray, but of infinitely greater significance and importance to the searcher after physical truth.

The action of the apparatus was such that the power of penetration gained by the ray during its operation at any time was retained, so that when the current was shut off the photic boring ceased, and recommenced when the batteries were again put into action at the point where it had left off.

When Roland Clewe had penetrated with his Artesian ray as deeply into the earth beneath him as the photic power of his instrument would admit, he had applied all the available force of his establishment--the men working in relays day and night--to the manufacture of the instruments which should give increased power to the penetrating light, which he hoped would make visible to him the interior structure of the earth, up to this time as unknown to man as had been the regions of the poles.

For instance, he found that when standing and gazing down into the great photic perforation below him, he could see into it quite as well when he shut his eyes as when they were open; the light passing through his head made his eyelids invisible.

The appliances for increased electric energy were working well, and Clewe was entirely satisfied with the operation of his photic borer.