Postage stamps and other stamped paper on hand in post offices, July 1, 1915 $104,035,823.48 Stamped paper charged to postmasters 287,352,176.84 Sales by postmasters, July 1, 1915, to June 30, 1916 277,728,025.20 Stamped paper on hand in post offices, June 30, 1916 112,332,714.66 The reduction in stamp sales which followed the outbreak of the war in Europe and the gradual recovery is shown in the increases, viz., for the quarter ending September 30, 1915, the percentage of increase was 3.01; for December 31, 1915, it was 9.04; for March 31, 1916, it was 9.87; for June 30, 1916, it was 11.25. Interesting information concerning the manufacture of stamps, etc., is given in the article relating to the Bureau of Engraving and Printing on page 46. Division of Classification This division is charged with the consideration of all questions relating to the classification of matter admitted to the mails, intended or deposited for mailing, including the determination of the admissibility of publications to the second class of mail matter, the limit of weight and size of mail, penalty envelopes and the franking privilege. This office is in the Bureau of the Third Assistant Postmaster General to whom all questions upon this and kindred subjects should be addressed. Purchasing Agent Under the direction and control of the Postmaster General, this officer has the supervision and purchase of all supplies for the Department, whether under contract or not, for the Post Office Department proper or for any branch of the postal service. The Postal Laws and Regulations provide that a Bureau officer controlling an appropriation, may authorize postmasters and other postal officials to purchase supplies chargeable to that appropriation subject to the approval of the purchasing agent in each instance. The Dead Letter Office All undeliverable mail matter comes within two classes, unmailable and unclaimed. The first comprises such as is not sufficiently prepaid or so incorrectly, insufficiently or illegibly addressed that the destination could not be discovered. All letters of this class containing matter of value is classified and recorded and a considerable amount of money can thus be returned to the owner. The larger part of such unmailable matter contains articles of merchandise, photographs, etc. The undeliverable letters are those that though properly prepaid and correctly addressed are unclaimed, not taken out of the office, though effort had been made by advertisement to find the owner.