Unit One TEXT Ⅰ English and American Concepts of Space TEXT Ⅱ Private Space Unit Two TEXT Ⅰ Tourists TEXT Ⅱ Chestnut Street from a Fire Escape Unit Three TEXT Ⅰ The Subway TEXT Ⅱ Living in Two Worlds Unit Four TEXT Ⅰ Style and Purpose TEXT Ⅱ Pub or Groggery. Unit Five TEXT Ⅰ The Santa Aria TEXT Ⅱ The Dust-Blanketed Land Unit Six TEXT Ⅰ How to Get Things Done TEXT Ⅱ Now That I'm Organized Unit Seven TEXT Ⅰ The Aims of Education TEXT Ⅱ Another School Year -- Why. Unit Eight TEXT Ⅰ Fifth Avenue, Uptown: A Letter from Harlem TEXT Ⅱ The Civil Rights Movement: What Good Was It. Unit Nine TEXT Ⅰ Roots of Freedom TEXT Ⅱ The Philosopher and the Conqueror Unit Ten TEXT Ⅰ Fear of Dearth TEXT Ⅱ The Backpacker Unit Eleven TEXT Ⅰ Beyond Invalidism, Part One TEXT Ⅱ Beyond Invalidism, Part Two Unit Twelve TEXT Ⅰ Charles Darwin TEXT Ⅱ Charles Darwin Unit Thirteen TEXT Ⅰ The Scopes Trial TEXT Ⅱ The Trial That Rocked the World Unit Fourteen TEXT Ⅰ Reading the River TEXT Ⅱ The Wilderness References