In 1864 the number of city delivery offices was 66, number of carriers 685, cost of service, 1864, $317,063.20. In 1916 the number of offices was 1,864, number of carriers 34,114, and the cost of service $43,136,818. Average annual salaries of carriers for the past four years has increased from $1,080.22, to $1,115.46. Carriers enter the service at a salary of $800 per annum and are promoted annually on their service record through the various grades until they reach the salary of $1,100 at first class offices, and $1,000 at offices of the second class, after which promotion depends upon their exceptional efficiency. Star Routes June 30, 1916, the number of star routes was 11,187, length in miles, 147,167, average cost per mile of length of routes $54.16, per mile of travel $0.1026. In the renewal of contracts on certain routes in the western States under new form of advertisement there was a reduction in the cost of operation of $130,000. Star routes are so-called because originally, a “star” appeared on the advertisements for contract bidding to distinguish them from other contracts and because of the words “with due celerity, certainty and security” which appeared in connection with such contract service. The purpose of star route service is to serve post offices off the line of railroad travel and incidentally such families as may live between those post offices who erect boxes or hang out satchels to receive their mail, also to collect mail where proper provision has been made for the purpose. No bid submitted under an advertisement for star route service will be considered unless the bidder shall agree in his bid that in the event of the contract being awarded to him he will reside on or contiguous to the route and give his personal supervision to the performance of the service. Postal Savings The postal savings system was inaugurated January 3, 1911. In June, 1916, the number of depositors was 602,937 and the balance to the credit of depositors was $86,019,885.00. The denominations of postal notes or certificates are $5.00, $10.00, $20.00, $50.00 and $100.00, and they may be purchased at any postal depository. The interest allowed by the Government is 2 per cent. These deposits may be exchanged in amounts of $20.00 and multiples thereof, for 2½ per cent U. S. Postal Savings, registered or coupon bonds. Postal certificates are made at the Bureau of Engraving and Printing. Money Order System