FOREWORD TO STUDENTS 



This book will be your guide in the study of gen- 

 eral science. If you are to get full benefit from it, 

 you should first become familiar with its parts. The 

 questions below will help to acquaint you with the 

 book. 1 



1. With what part of general science does this 

 book deal? (Study the table of contents before an- 

 swering.) 



2. What are the large divisions of the book called? 



3. How many of these large divisions are there? 



4. Into what are these large divisions divided? (See 

 PP . 21, 76, 86.) 



5. What is a problem? 



6. How are "problems" in the book related to "top- 

 ics"? (See pp. 1, 7, 103.) 



7. The book gives you aids of several kinds in 

 solving problems. 



a. What do you observe about suggestions for 

 study on pp. 1, 12, 21, 119. 



b. What is an experiment and how can it help in 

 solving problems? (See pp. 2, 8, 21, 111.) 



c. Of what value are the "readings" in solving 

 problems? (See pp. 13, 34, 39, 93.) 



1 See workbook to accompany this text, p. 1. 



d. How should you use illustrations in solving 

 problems? (See pp. 161, 172, 190, 203.) 



e. What additional helps do you find on pp. 6, 20, 

 49? 



8. What is the purpose of such tests as those on 

 pp.7, 11, 15, 140. 



9. What kinds of additional material are provided 

 for pupils who work more rapidly than others? (See 

 pp. 26, 55, 145, 214.) 



From your investigation you will have discovered 

 that each topic develops the problems in bold type at 

 the beginning of the topic. Be careful to make use of 

 the suggestions for study. When you perform an ex- 

 periment, have the results checked by your teacher 

 before you go to the next experiment. With the 

 knowledge that you gain from the experiments you 

 are ready to secure additional information by reading 

 the textual matter. Try to think of what you read in 

 its connection with your experiments. 



Check the success of your study by the list of aims 

 at the end of each topic. Then perform the mastery 

 exercises to find out whether there are any parts of 

 the topic that you should study further. These mas- 

 tery exercises should be done without the aid of notes 

 or books. 



iv 



