The New Student's Reference Work/Reciprocity

Reciprocity (rĕs′ĭ-prŏs′i-ty̆), an arrangement between two countries charging tariff-duties against other countries, to admit such articles as may be agreed upon into each other's ports free from duty. When the McKinley tariff-law of the United States was passed in 1890, a provision giving the president discretionary power to enter into reciprocity treaties or arrangements with other nations was made one of its leading features.