CONTENTSUnit Ⅰ MACHINES AND THEMODERN WORLDLesson One Machines in the City 1
Lesson Two Machines on the Farm 15
Lesson Three The Ultimate Machine：TheElectronic Computer 26
Unit Ⅱ TRANSPORTATIONLesson Four America on Wheels 39
Lesson Five BART：An Automated Answer tothe Problems of Urban Transpor-tation 56
Lesson Six Airplanes：Yesterday，Today，andTomorrow 74
Lesson Seven Travel in Space：To the Moonand Beyond 90
Unit Ⅲ COMMUNICATIONLesson Eight Television：The Modern Wonderof Electronics 106
Lesson Nine The Telephone of Today—andTomorrow 122
Lesson Ten Communications Satellites 138
Unit Ⅳ BREAKTHROUGHSIN MEDICINELesson Eleven The Search for New Drugs 151
Lesson Twelve The Heart Laid Open：Open-HeartSurgery 166
Lesson Thirteen The Shape of Things to Come：The New Doctor 182
Unit Ⅴ OUR CHANGINGLANDSCAPELesson Fourteen The Land and Its’Limits 198
Lesson Fifteen Urban Renewal or SuburbanSprawl? 216
Lesson Sixteen Planned Cities 230
Lesson Seventeen Tokyo Goes Underground 245