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Dominion, Volume 14, Issue 281, 22 August 1921, Page 9

A liquid that renders flesh invisible ot transparent has invented (says an exchange). If a hand or arm is immi’i'sed in this liquid its flesh will disappear almost entirely from view; the bones, however, will be visible, as under X-rays. The mixture makes the flesh of the hand transparent because it has the same index of light refraction as the flesh. The light rays passing through the liquid are not bent, or refracted, when they pass through the flash, though they are bent by teh bones, which have a different index of refraction. Different parts of the body have different indices of refraction; any part can bo made to disappear by submerging it in the proper liquid. But not till parts at once, so tho magic cloak of invisibility is still to be discovered!