- Look closely at the photo. Describe what the man is working on.
- Peter Henlein, the man in the photo, was a locksmith and clockmaker from Germany in the 1500s. He invented the world's first watch. Why would a watch be an important innovation for society?
- Before the Standard Time Act of 1918, the railroads in the United States could choose their own time standards for schedules. Why would it be beneficial for railroads to use a standard time to create the train schedules?
"Occupational portrait of a watchmaker, three-quarter length, seated at table with watches," between 1840 and 1860. Courtesy of Library of Congress