DISTRIBUTION OF INCOMING LETTERMAIL AT THE BALTIMORE, MARYLAND CITY POST OFFICE

摘要

This report presents the results of a sampling study done to determine the distribution of Incoming letter mail at the Baltimore City Post Office. The study includes both First and Third class letter mail.nThe principal results of this study are summarized below:n1. Baltimore handles about 1, 350, 000 incoming letters per day.n2. About one-third of the incoming letter mail is Third class;the remainder, First class.