CONTENTS 5
1．THE SOLAR SYSTEM 5
2．SHOOTING STARS 7
3．NEWTON AND THE PROBLEM OF GRAVITATION 10
4．TIMBER 14
5．NEW METHODS OF COMPUTATION 16
6．？OUCTION OF STEEL 19
7．INCANDESCENTAND FLUORESCENT LAMPS 21
8．HOW MANY ELEMENTS ARE KNOWN 24
9．THE SIZE AND MOTION OF INVISIBLE PARTICLES 27
10．AUTOMATIC CONTROL IN MINES 30
11．AUTOMATION IN THE U．S．S．R． 33
12．SCIENCE IN ACTION 36
13．TAMING THE DESERT 39
14．NORTHEAST CHINA—HEAVY INDUSTRY BASE 41
15．CHINA’S INDUSTRIAL DEVELOPMENT 46
16．EVERYONE A GEOLOGIST 50
17．CHINA’S WEALTH 54
18．THE TECHNICAL REVOLUTION 60
19．HEAT，STEAM，AND POWER 66
20．THE INTERNAL COMBUSTION ENGINE 71
21．RAILROAD ENGINEERING 75
22．HOW YOU’LL FLY WITHIN 50 YEARS 79
23．AIR-CONDITIONING AND REFRIGERATION 84
24．x-RAYS 88
25．SATELLITES WILL BE USEFUL 94
26．WHAT WILL WE DO WITH THE MOON 98
27．ULTRASONICS AND ULTRASONIC TOOLS 107
28．POWER FROM THE SUN 113
29．NUCLEAR FIRES 118
30．NEW ATOMIC REACTOR AND CYCLOTRON 124
VOCABULARY 129