A PROCLAMATION.

Whereas by an act of the Congress of the United States of the 24th of
May, 1828, entitled "An act in addition to an act entitled 'An act
concerning discriminating duties of tonnage and impost,' and to equalize
the duties on Prussian vessels and their cargoes," it is provided that
upon satisfactory evidence being given to the President of the United
States by the government of any foreign nation that no discriminating
duties of tonnage or impost are imposed or levied in the ports of the
said nation upon vessels wholly belonging to citizens of the United
States, or upon the produce, manufactures, or merchandise imported in
the same from the United States or from any foreign country, the
President is thereby authorized to issue his proclamation declaring that
the foreign discriminating duties of tonnage and impost within the
United States are, and shall be, suspended and discontinued so far as
respects the vessels of the said foreign nation and the produce,
manufactures, or merchandise imported into the United States in the same
from the said foreign nation or from any other foreign country, the said
suspension to take effect from the time of such notification being given
to the President of the United States and to continue so long as the
reciprocal exemption of vessels belonging to citizens of the United
States, and their cargoes, as aforesaid, shall be continued, and no
longer; and

Whereas satisfactory evidence has lately been received by me from His
Imperial Majesty the Emperor of Austria, through an official
communication of the Baron de Lederer, his consul-general in the United
States, under date of the 29th of May, 1829, that no other or higher
duties of tonnage and impost are imposed or levied since the 1st day of
January last in the ports of Austria upon vessels wholly belonging to