But similar varieties have certainly appeared, and for like causes, at other times. Collectors of curiosities will find: 1 cent plain frame, perforated 12. 2 cents " " " " 3 " " " " " 6 " " " " " 10 " " " " " The stamps from the plates with the imprint of this Company, now bear on the back a white gum, and not the brownish, used by the National Bank Note Company, which will help to distinguish impressions made by them from the old plates. The colors, however, are not identical, and will further serve to distinguish them. There may be exceptions, but ordinarily the ONE CENT is a pure indigo, without the red or ultramarine cast, of those printed previously, whether lighter or deeper impressions are chosen. The TWO CENTS has also lost its reddish tone, and is a dull brown, with a tendency to blackish-brown, whether lighter or deeper in shade. The THREE CENTS is of a duller and generally a pale shade. The SIX CENTS is much lighter and is a washy pink. The SEVEN CENTS is a more yellowish vermilion. The TEN CENTS approaches very nearly to the original shade of the two cents, but is a little more of a blackish brown, very unlike the delicate original shade. The oval and face lines are dark and heavy. The FIFTEEN CENTS is a much paler orange. The higher values, TWENTY-FOUR, THIRTY and NINETY CENTS, have a thinner tone than the deep rich color of the former Company's work. In the meantime, the following changes were announced in a circular to postmasters: POST OFFICE DEPARTMENT, Office of the Third Assistant Postmaster General, Division of Stamps, Stamped Envelopes & Postal Cards. _Washington, D. C., June 21st, 1875._ The Department is prepared to commence the issue of postage stamps of the denomination of five (5) cents to meet the new letter rate of postage, under the treaty of Berne, to the following countries, viz: [Here follow the names of all countries that had then joined the Postal Union, to which five cents was the rate.] The new five cent stamp is designed from a bust of Gen. Zackary Taylor in full face, and printed in dark blue color. The changes in foreign postages will render unnecessary the further use of the 7, 12 and 24 cent stamps and stamped envelopes, and they will accordingly be discontinued. In order to avoid the liability to mistake caused by the near similarity in color between the two cent and ten cent stamp, the former will in future be printed in vermilion, the color of the discontinued seven cent stamp. [Here follows directions to use up the stock of the discontinued stamps and envelopes, whenever they can be utilized.] (Signed.) E. W. BARBER, Third Assistant Postmaster General.