LESSON TWO 
ANIMALS MADE USEFUL 
Domestic animals. 
Life cycle. 
Struggle for existence. 
Crowd of animals. 
Way of the wild. 
. Natural selection. 
. Artificial selection. 
. Heredity. 
. Variation. 
SCHNANR WN 
= 
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Atavism. 
-_ 
bea 
. Crossing peas. 
= 
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. Dominant and recessive characters. 
= 
jee) 
. Pure-bred races. 
. Scrub stock. 
15. Improving the herd. 
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~~ 
Note to the Teacher.—In this lesson the contrast of 
living between the wild and tamed animals is indicated. 
Also the fundamental principles of animal improvement, 
both of the breed and the herd, are discussed. An ex- 
cellent opportunity is offered here for assigned readings 
and essays covering the important steps of a race from 
the time of capture in its original haunts to the largest 
““ development under domestication. Pupils will do well to 
get this chapter in one lesson without outside reading. 
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