222-225.) The inhabitants of New Caledonia, to appease their hunger, eat pieces as big as the fist of friable steatite, which Vauquelin found to contain in addition no inconsiderable quantity of copper. (Voyage à la Récherche de la Pérouse, T. ii. p. 205.) In Popayan, and several parts of Peru, calcareous earth is sold in the streets as an eatable for the Indians; it is used with Coca (the leaves of the Erythroxylon peruvianum.) Thus we find the practice of eating earth diffused throughout the torrid zone, among indolent races inhabiting the finest and most fertile parts of the globe. But accounts have also come from the North, through Berzelius and Retzius, according to which, hundreds of cartloads of earth containing Infusoria are said to be annually consumed by the country people, in the most remote parts of Sweden, as breadmeal, and even more from fancy (like the smoking of tobacco) than from necessity! In Finland this kind of earth is occasionally mixed with the bread. It consists of empty shells of animalculæ, so small and soft that they do not crunch perceptibly between the teeth; it fills the stomach, but gives no real nourishment. In periods of war, chronicles and documents preserved in archives often give intimation of earths containing infusoria having been eaten; speaking of them under the vague and general name of “mountain meal.” It was thus during the Thirty Years’ War in Pomerania (at Camin); in the Lausitz (at Muskau); and in the territory of Dessau (at Klieken); and subsequently in 1719 and 1733 at the fortress of Wittenberg. (See Ehrenberg über das unsichtbar wirkende organische Leben, 1842, S. 41.) [51] p. 25.--“_Figures graven on the rock._”