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Excerpt from Manual de Geología Aplicada a la Agricultura Y A las Artes Industriales, Vol. 1
Parte segunda. - Geognosia. - Capitulo I - Clasiñcamon genéalóg ºica de las rocas; introduccion; definicion de Geognosia; minerales y fosi les; cuadro de los elementos químicos; enumeracion de los diez y seis mas importantes; oxígeno, hidrógeno, azoe, carbonº, azufre, clo ro, silicio, aluminio, potasio, sodio; h erro, manganeso &c.
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