The remission of a tax, particularly on goods intended for export, being a special advantage extended by government in aid of trade and manufactures, and having the same effect as a bonus or drawback. It is a device resorted to for enabling a commodity affected by taxes to be exported and sold In the foreign market on the same terms as if it had not been taxed. U. S. v. Passavant, 109 U. S. 16, 18 Sup. Ct. 219, 42 L. Ed. 644; Downs v. U. S., 113 Fed. 148, 51 C. C. A. 100.