Contents 1
1．Hints for Reading Practice 1
2．Of What Is the Soil Made ？ 8
3．Numbers and Mathematics 12
4．The Big Eye 17
5．Early Birds 24
6．Issac Newton 30
7．Uses of Atoms 37
8．Splitting of the Nucleus 42
9．The Four Seasons 46
10．Theory and Practical Application 53
11．Basic and Applied Research 57
12．Plastics 63
13．Automation 70
14．Dispersion and Color 77
15．Worlds in Space 82
16．From the Earth：Greetings 90
17．Zero 96
18．The Spacemen 100
19．Ocean of the Sky 105
20．Methods Used by Scientists 111
21．How Long Is a Micromicrosecond ？ 115
22．How Pictures Move 122
23．Through the Earth’s Crust 127
24．Space Travel 132
25．The Scientific Attitude 138
26．What Is CCTV？ 144
27．The Vegetable Kingdom—Plants（Ⅰ） 150
28．The Vegetable Kingdom-Plants（Ⅱ） 156
29．The Electronic Computer 161
30．Instinct or Cleverness ？ 169