Article XVIII.--This treaty shall remain in force for twenty years from the date of the exchange of ratifications. After the expiration of that period, it shall continue in operation until one of the contracting parties shall have notified all the others of its desire to terminate it. In the event of such notice the treaty shall continue obligatory upon the party giving it for at least one year thereafter, but the withdrawal of one or more nations shall not invalidate the treaty with respect to the other nations concerned. Article XIX.--This treaty shall be ratified by all the nations approving it, according to their respective constitutional methods; and the ratifications shall be exchanged in the city of Washington on or before the first day of May, A.D. 1891. Any other nation may accept this treaty and become a party thereto, by signing a copy thereof and depositing the same with the Government of the United States; whereupon the said Government shall communicate this fact to the other contracting parties. Butler & Tanner, The Selwood Printing Works, Frome, and London. End of the Project Gutenberg EBook of Pax mundi, by Klas Pontus Arnoldson