412 QUESTIONS ON 



CHAPTER III. 



414. With what process is internal heat connected ? 



415. What do we understand by the term latent heat? 



416. What is given us as a general law of matter? 



417. What is the difference between sensible and specific heat ? 



418. How does combustion illustrate this distinction ? 



419. Apply these principles to explain animal heat. 



420. What was once generally believed? 



421. What is the process now generally maintained ? 



CHAPTER IV. 



422. How does exercise increase animal heat? 



423. How does impeded circulation affect the temperature ? 



424. How is this internal combustion maintained? How impeded I 



425. What hindrances are enumerated? 



426. Why do persons in a crowded room grow cold? 



427. Who need most external protection from cold, and why ? 



428. What is needed to maintain this internal combustion besides 

 air? How is it supplied? 



429. Who can best resist external cold? 



430. Which protects from cold best, alcohol or food ? 



431. Which warms most, flesh or bread? What necessity has na- 

 ture met ^nd supplied ? 



CHAPTER V. 



432. What other influences affect the supply of heat ? 



433. How do different states of the system modify the quantity of 

 heat? 



434. What lessens the production of heat ? 



435. What difference at different periods of life ? 



436. How does sleep affect the power of producing heat ? 



" 437. On what does the amount of heat in combustion depend ? 



438. How mur-h heat is generated in the body in a day? 



439. What prevents an increase of temperature in the body? 



440. How does heat escape from the body? 



441. What active power does the skin exert? In what way does 

 perspiration cool the body? 



442. How do Blagden's experiments illustrate this principle? 



443. What beautiful adaptation is mentioned ? 



444. What is the winter constitution ? The summer constitution ? 



445. What were the experiments of Dr. Edwards ? 



446. Why is the transition from the cold of winter to the heat of 

 summer unattended with suffering ? 



447. Who especially need the protection of thick clothing in win- 

 ter ? 



