Stream, Download, Share, and Modify
An operator employed by the Post Office cable and wireless services sends a message to New York by the Mackay circuit. (Photo by Monty Fresco/Getty Images)
© 2016 PBS & WGBH Educational Foundation.
All rights reserved.
You must be logged in to use this feature
Assign directly to your students using the code or link above, without having them log in. Simply tell your students to go to
www.pbsstudents.org and enter the Assignment Code, or click on the Assignment URL to share the assignment as a link.