https://www.usa.gov/copyrighted-government-workshttps://www.rawpixel.com/image/12296196Edit ImageSaveSaveEditCropCustom TextWashington, D.C. Miss Helen Ringwald works with the pneumatic tubes through which messages are sent to branches in other parts of the city for delivery. Sourced from the Library of Congress.View public domain image source hereMorePublic DomainFree CCO U.S. Government image for Personal and Business useInfoView CC0 LicenseEditorial use only JPEGTIFFSmall JPEG 1200 x 957 px | 300 dpiLarge JPEG 3500 x 2792 px | 300 dpiBest Quality JPEG 4096 x 3268 px | 300 dpiTIFF 4096 x 3268 px | 300 dpi | 12.77 MBFree DownloadWashington, D.C. Miss Helen Ringwald works with the pneumatic tubes through which messages are sent to branches in other parts of the city for delivery. Sourced from the Library of Congress.More