"A Busy Scene on the Panama Canal"

stereograph

Keystone stereograph of ship in Panama Canal lock; caption reads "21784 -- South Over Gatun Locks and Gatun Lake, Emer-/ gency Dam in Position -- A Busy Scene/ on the Panama Canal."; published by the Keystone View Company; reverse side has the history of the Panama Canal and details of its function; unidentified steamship in the lock, and other vessels in the background.