Updated timelines

Scientific Revolution
Scientific Revolution timeline
Chapter 27 Timeline
Chapter 27
Evolucion de la Tecnología Educativa
13 colonies
World War II
Negotiations Timeline
Negotiations Timeline
Annotated Timeline for APUSH
The Scientific Revolution
1820's - 1850's
1820-1850_HB
1820-1850_HB timeline
Economic Transformations of the United States
Chapter 27
Chapter 27 Timeline
Chapter 27 Timeline
Important events in 1820-1850
"These are the Moments"