Lawrence Watt-Evans

“The contrivance was quite fantastic, and presented the appearance of some new, highly complicated musical instrument. I remember that there were many wires of varying thickness, stretched on a series of concave sounding-boards of some dark, unlustrous metal; and above these, there depended from three horizontal bars a number of square, circular and triangular gongs. Each of these appeared to be made of a different material; some were bright as gold, or translucent as jade; others were black and opaque as jet. A small hammer-like instrument hung opposite each gong, at the end of a silver wire. Averaud proceeded to expound the scientific basis of his mechanism. The vibrational properties of the gongs, he said, were designed to neutralize with their sound-pitch all other cosmic vibrations than those of evil. He dwelt at much length on this extravagant theorem, developing it in a fashion oddly lucid. He ended his peroration: “I need one more gong to complete the instrument; and this I hope to invent very soon. The triangular room, draped in black, and without windows, forms the ideal setting for my experiment. Apart from this room, I have not ventured to make any change in the house or its grounds, for fear of deranging some propitious element or collocation of elements.” More than ever, I thought that he was mad. And, though he had professed on many occasions to abhor the evil which he planned”
― Lawrence Watt-Evans, The Mad Scientist Megapack: 23 Tales of Scientists, Creatures, & Diabolical Experiments!