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Dicyanin Glass and the Claim It Could Reveal the Human Aura

Dicyanin glass is one of the most famous objects in aura-vision lore. Usually traced to Walter J. Kilner’s early 20th-century experiments, the claim held that specially prepared dicyanin screens could train the eye to perceive the etheric double and surrounding aura, a belief that later evolved into commercial aura-viewing glasses and a lasting esoteric myth.