CONTENTS

1．THE SOLAR SYSTEM

2．SHOOTING STARS

3．NEWTON AND THE PROBLEM OF GRAVITATION

4．TIMBER

5．NEW METHODS OF COMPUTATION

6．？OUCTION OF STEEL

7．INCANDESCENTAND FLUORESCENT LAMPS

8．HOW MANY ELEMENTS ARE KNOWN

9．THE SIZE AND MOTION OF INVISIBLE PARTICLES

10．AUTOMATIC CONTROL IN MINES

11．AUTOMATION IN THE U．S．S．R．

12．SCIENCE IN ACTION

13．TAMING THE DESERT

14．NORTHEAST CHINA—HEAVY INDUSTRY BASE

15．CHINA’S INDUSTRIAL DEVELOPMENT

16．EVERYONE A GEOLOGIST

17．CHINA’S WEALTH

18．THE TECHNICAL REVOLUTION

19．HEAT，STEAM，AND POWER

20．THE INTERNAL COMBUSTION ENGINE

21．RAILROAD ENGINEERING

22．HOW YOU’LL FLY WITHIN 50 YEARS

23．AIR-CONDITIONING AND REFRIGERATION

24．x-RAYS

25．SATELLITES WILL BE USEFUL

26．WHAT WILL WE DO WITH THE MOON

27．ULTRASONICS AND ULTRASONIC TOOLS

28．POWER FROM THE SUN

29．NUCLEAR FIRES

30．NEW ATOMIC REACTOR AND CYCLOTRON

VOCABULARY