ON THE STUDY OF PHYSICS 303 



Why are thunder and lightning more frequent in sum- 

 mer than in winter ? 



What occasions falling stars ? 



What is the cause of the sensation called "pins and 

 needles" ? 



What is the cause of waterspouts? 



What is the cause of hiccup ? 



If a towel he wetted with water, why does the wet por- 

 tion become darker than before ? 



What is meant by Lancashire witches ? 



Does the dew rise or fall ? 



What is the principle of the hydraulic press ? 



Is there more oxygen in the air in summer than in 

 winter ? 



What are those rings which we see round the gas and 

 sun? 



What is thunder ? 



How is it that a black hat can be moved by forming 

 round it a magnetic circle, while a white hat remains sta- 

 tionary ? 



What is the cause of perspiration ? 



Is it true that men were once monkeys ? 



What is the difference between the soul and the mindf 



Is it contrary to the rules of "Vegetarianism to eat 

 eggs? 



In looking over these questions, which were wholly 

 unprompted, and have been copied almost at random from 

 the book alluded to, we see that many of them are sug- 

 gested directly by natural objects, and are not such as 

 had an interest conferred on them by previous culture. 

 !N"ow, the fact is beyond the boy's control, and so cer- 

 tainly is the desire to know its cause. The sole question 



