In 1669 he published his Physica subterranea, and the same year was engaged with the count of Hanau in a scheme for settling a large territory between the Orinoco and the Amazon.
ORINOCO, a river in the north of South America, falling north-east into the Atlantic between 60° 20' and 62° 30' W.
of the Orinoco and Apure, with the Yuruari territory on the E., the Caroni river forming the boundary, and the Amazonas territory and Brazil on the S.
The capital is Ciudad Bolivar, formerly called Angostura, which is situated on the right bank of the Orinoco about 240 m.
Vessels of light draught easily ascend the Orinoco to this point, and a considerable trade is carried on, the exports being cocoa, sugar, cotton, hides, jerked beef and various forest products.