THE BOOK SHELF 323 



a shock, while a man would get a shock if he reached up and took hold of the 

 same wire? What makes an electric heater hot? Why does lightning kill 

 people? Under Chemical Change and Energy such topics are discussed as: 

 "How gasoline makes a motorcycle go and why it goes 'pop, pop, pop' ; What 

 makes a gun shoot? Why a fire is hot? What flames are? What smoke is? 

 How a camera can take a picture? What makes cloth fade in the sun? What 

 makes freckles?" 



The book is charmingly illustreated with photographs of real boys and girls 

 performing the experiments and in the reviewer's opinion will prove an im- 

 portant factor in making the book attractive to Junior Scientists. A pamphlet 

 accompanies the book giving the teacher full list of apparatus and materials 

 needed for each experiment. The whole scheme of instruction is .admirable 

 in this book for it exemplifies the true Nature Study principles of working out 

 each science from the child's standpoint. 



