Chicago-Cleveland Service Established Quickens Services to Eastern Cities The Post Office Department has notified postmasters (P. M. McIntyre of Nogales receiving the notification yesterday) that a regular air service has been established between Chicago, IL, and Cleveland, C., which service advances carriers’ delivery in the eas tern cities by a number of hours. _ Under the arrangement letters bearing aeroplane stamps, or ordinary postage at the rate of six cents per ounce, and endorsed “Air Mail” are sent to Chicago direct, and there made ,up in the mail that is sent along to Cleveland by airplane, going right aboard regular mail trains in the Ohio city, and going along to their respective destinations. By arrangement mentioned letters despatched in that way gain a number of hours upon their schedule on all rail transportation. According to the official notification the expedition given such letters ranges as high as sixteen hours. In Cleveland air mail letters arrive so they are delivered in the afternoon of the day they leave Chicago, when if they had taken the slower railway mail route delivery would not have been effected until next morning. In Albany, New York and Springfield, Mass., air mail let ters are given morning delivery in stead of afternoon delivery, and in Boston the gain is all the time over night, as at Cleveland. The faster airplanes carry the air mails so they catch at Cleveland trains that had left Chicago hours ahead of their arrival in the big city by Lake Michigan. In the schedule given postmasters certain specified trains from the West deliver air mail to connection with the transporting airplanes. Air mail from Kansas City and the Southwest, including Arizona, reaches Chicago on Santa Fe train No 10, and within a very few minutes it is flying off toward Cleveland.