The second addition was a 5 cent stamp, which is a bit of an anomaly inasmuch as it is a companion in size and design to the 1868 series, but was issued on October 1, 1875, after the series in reduced size, begun in 1870, had been practically completed. The explanation is simple: the die of this large 5 cent stamp had been engraved in 1867 with the other values of the first Dominion series,[87] but as there were no rates requiring such a denomination in the set, it was not issued. When in 1875 the need for a 3 cent value arose, the unused die was employed to make a plate for temporary use, until a new die conforming in size and design with the small stamps could be prepared. The large 5 cent stamp is thus really in the nature of a provisional, for its smaller and permanent successor followed it in about four months. [87] In the first series of the =American Journal of Philately= for June 1, 1868 (I: 25) we read: "The Canadian Government have had a 5 cent stamp prepared, engraved of the same type as the present set, the most noticeable difference being the circle round the head which is corded. The specimen sent us is printed in brown on India paper, bearing the Company's imprint underneath." The statement is often made that the 5 cent denomination was required because of Canada's entry into the Universal Postal Union, which was instituted on July 1, 1875. The statement has elements of truth in it, inasmuch as the indirect results of Canada's application produced the 5 cent rate which required the new stamp; but the statement is not exact because Canada was not actually admitted to the Postal Union until three years later. The Postmaster General's Reports tell the story. The Report for 30th June, 1875 says:-- A treaty for the formation of a General Postal Union, and for the adoption of uniform postage rates and regulations for International correspondence, was arranged and signed at Berne, Switzerland, in October, 1874, by the representatives of the Post Offices of the chief Nations of the world. This agreement took effect between all the countries which were directly parties to the Treaty, in July last. The Treaty did not include the British Possessions beyond the sea, but Canada has, with the concurrence of the Imperial Government, applied for admission as a member of this Postal Union. Meanwhile the letter rate of postage between Canada and the United Kingdom has, by arrangement with the Imperial Post Office, been reduced to the International rate of 2-1/2 pence sterling--5 cents currency, established by the Union regulations; and this reduction has also been made applicable to correspondence passing by way of New York, making the rate between Canada and the United Kingdom uniform at 5 cents by whatever route conveyed.