In accordance with the Argentine-Bolivian treaty of 1889 the boundary line between these republics contin ies up the Pilcomayo to the 22nd parallel, thence west to the Tarija river, which it follows down to the Bermejo, thence up the latter to its source, and westerly through the Quiaca ravine and across to a point on the San Juan river opposite Esmoraca.
The Bermejo, which is an Argentine river, receives one large tributary from the Bolivian uplands, the Tarija or Rio Grande, which drains a small district south-east of the Santa Victoria sierra.
Farther south the llanos of Chuquisaca and Tarija also sustain large herds of cattle on the more elevated districts, and on the well-watered plains of the Chaco.
The latter include so-called universities at Sucre (Chuquisaca), La Paz, Cochabamba, Tarija, Potosi, Santa Cruz and Oruro - all of which give instruction in law, the first three in medicine and the first four in theology.
The first includes the departments of Chuquisaca, Oruro, Potosi, Tarija and the Chilean province of Antofagasta, with its seat at Sucre, and is known as the archbishopric of La Plata.