238 



LIFE ON THE EARTH 



Special references 



Jewett, The Next Generation 

 Downing, The Third and Fourth Generation 

 Luther Burbank Society, Burbank, His Methods and Dis- 

 coveries 



Harwood, New Creations in Plant Life 

 Burbank, How Plants Are Trained to Work for Man 

 Guyer, Being Weil-Born 



WHAT YOU SHOULD AIM TO ACQUIRE FROM 

 THIS STUDY 



1. A thorough understanding of the scientific prin- 

 ciples of variation and heredity. 



2. How man improves plants and animals for his own 

 benefit. 



3. The contributions of Mendel and Burbank. 



4. How heredity, environment, and training affect the 

 lives of people. 



5. How man can improve himself. 



TEST OF MASTERY OF THE TOPIC 



In your notebook complete the statements, answer the 

 questions, and comply with the instructions. 



1. The continuance from generation to generation of simi- 

 lar traits in living things is called 



2. Our laws of heredity were first discovered by , . 



3. Three new varieties of plants that Luther Burbank 

 developed are 



4. Two methods employed by plant and animal breeders 

 to improve life are . 



5. Some conditions in my environment that are in need 

 of improvement are . 



6. Good and bad traits can be transmitted from parents 

 to their offspring by . 



7. Heredity in man works according to , 



8. No two human beings in the world are exactly alike. 

 Why is this so? 



9. Write a paragraph explaining how the human race 

 may be improved from generation to generation. 



10. Offspring are never like their parents. This fact is 

 expressed by the term 



SUPPLEMENTARY MATERIALS 



Reading suggestions 



De Kruif, Microbe Hunters (Harcourt) 

 De Kruif, Hunger Fighters (Harcourt) 

 Sanderson, Insect Pests of Farm, Garden, and Or- 

 chard (Wiley) 



Mayne and Hatch, High School Agriculture (Ameri- 

 can Book) 



Jordan, The Heredity of Richard Roe (Beacon Press) 

 Waldo, Stories of Luther Burbank and His Plant 



School (Scribner) 



Wiggam, Fruit of the Family Tree (Bobbs) 

 Goddard, The Kallikak Family (Macmillan) 

 Bayne- Jones, Man and Microbes (Williams and Wil- 



kins) 



Fishbein, Fads and Quackery in Healing (Covici) 

 Flint and Metcalf, Insects: Man's Chief Competitors 



(Williams and Wilkins) 



Haggard, Devils, Drugs, and Doctors (Harper) 

 Meyr, Your Germs and Mine (Doubleday) 

 Phillips, Skin Deep: The Truth about Beauty Aids 



(McLeod) 



Zinsser, Rats, Lice, and History (Little) 

 Fishbein, Shattering Health Superstitions ( Liveright ) 

 Haggard, What You Should Know about Health and 



Disease (Harper) 

 Harrow, Vitamins (Button) 



Hull, Diseases Transmitted from Animals to Alan 

 (Thomas) 



Reports which may be prepared 



1. The life of Louis Pasteur 



2. Luther Burbank and his work 



3. Koch and the discovery of tuberculosis 



4. The work of Walter Reed and his associates 

 in their investigations of yellow fever 



5. The life and work of Edward Jenner 



6. The proper care of milk 



7. Colds and their causes 



8. The mosquito and malarial fever 



9. Beneficial bacteria and their work 



10. The fly and its relation to disease 



11. Patent medicines and quack doctors 



12. Contributions of Gregor Mendel to our knowl- 

 edge of heredity 



Great scientists you should know about 



1. Gregor Mendel 



2. Luther Burbank 



3. Dr. Walter Reed 



4. Louis Pasteur 



5. Robert Koch 



6. Edward Jenner 



Investigations and things to do 



1. Make and use a fly trap. 



2. Collect some frog's or toad's eggs and keep 

 them in right condition for development. Ob- 

 serve the progress of their development and 

 make a report of it. 



3. Investigate reproduction in a flowering plant 

 and report the differences between its method 

 of reproduction and the process of reproduction 

 of birds or frogs. 



4. Make a careful study of your own environment. 

 Compare it with a better and a poorer environ- 

 ment. What suggestions have you for the im- 

 provement of your own environment? 



5. Investigate how vaccines and antitoxins were 

 discovered. How are they prepared and used ? 



6. Investigate the best methods in use to destroy 

 harmful insects. 



