Lesson One 1
Text:The Age of AutomationR.M.HovercraftLesson Two 10
Text:Persistence of VisionR.M.Eyes and Space-travelLesson Three 19
Text:Quantity and QualityR.M Water and LifeLesson Four 28
Text:Measuring the Earth's AttractionR.M.What Is Measurement?Lesson Five 36
Text:Geology—an Open-air ScienceR.M.What Is It You Are Standing Upon?Lesson Six 45
Text:The Past as LivingR.M.Building Upon the PastLesson Seven 54
Text:The Spider,Nature's Engineer ExtraordinaryR.M.Spiders' Other AbilitiesLesson Eight 62
Text:Your Happiness Is in Your HandR.M.Cultivating a HobbyLesson Nine 72
Text:The Nature of HypothesisR.M.The Method of Scientific InvestigationLesson Ten 79
Text:What Is Science?R.M.Pure and Applied ScienceLesson Eleven 89
Text:Paper,Compass and GunpowderR.M.Progress Is InevitableLesson Twelve 101
Text:Madame CurieR.M.RadioactivityLesson Thirteen 113
Text:Madame Curie(continued)R.M.Radioactivity(continued)Lesson Fourteen 124
Text:Why Is the Sky Dark at Night?R.M.Continuity and Harmony in ScienceLesson Fifteen 135
Text:Loose the Spring in Your MindR.M.Newton's Theory and Beethoven's MusicLesson Sixteen 145
Text:Chance and ProbabilityR.M.Mathematics and Other SciencesLesson Seventeen 156
Text:Weather WisdomR.M.The Weather and AviationLesson Eighteen 168
Text:Studying Viruses in the LaboratoryR.M.Patients and DoctorsLesson Nineteen 179
Text:The Negro ScientistR.M.The Plant MagicianLesson Twenty 191
Text:The Billiard BallR.M.Mister Imagination附：大写规则和标点符号的用法 216
总词汇表（Vocabulary） 223