In the interior and in all domestic transactions the old Spanish weights and measures are still used - including the Spanish libra of 1.102 lb avoirdupois, the arroba of 25 libras (122 kilogrammes), the quintal of Too libras (50 kilog.), the carga of 250 libras (125 kilogs.), the vara of 80 centimetres, and the fanega.
The average yearly product is about 70,000,000 lb, worth approximately £1,300,000, and subject to an export duty of one gold dollar (4s.) per quintal (101 lb).
This treaty was never ratified, and four years later General Hilarion Daza, who had succeeded Dr Frias as president in 1876, demanded as the price of Bolivia's consent that a tax of 10 cents per quintal should be paid on all nitrates exported from the country, further declaring that, unless this levy was paid, nitrates in the hands of the exporters would be seized by the Bolivian government.