134 LABORATORY LESSONS IN GENERAL SCIENCE 



9. What are various uses for (a) cow's hair; (b) the 

 horns ; (c) the blood ; (d) the bones ; (e) the fat ? 



10. Name at least two different breeds of cows, and state 

 in what respects they differ in (a) size ; (6) color ; (c) quan- 

 tity and quality of milk given ; (d) beef production. 



11. Where a cow is kept for profitable milk production, 

 what must be true (a) of the quantity and quality of feed ; 

 (b) of the water supply; (c) of regularity in feeding and 

 milking ; (d) of definite knowledge of the income and outlay 

 for each animal ? 



12. Of what advantage is the use of the cream separator 

 in dairying as to (a) amount of cream taken from the milk ; 

 (6) labor involved in the care of milk? In what ways has 

 the general use of cream separators largely changed the 



industry of butter- 

 j t j j making ? What use 



I 1 L-L 1 1 does the farmer make 

 of the milk from 

 which the butter-fat 

 has been separated? 



13. What sections 

 of country are espe- 

 cially favorable for 



FIG. 61. Clean milk requires precautions at dairying as regards 



(a) general character 



of the country for tillage ; (b) price of land per acre ; (c) dis- 

 tribution of rainfall throughout the grazing season ; (d) near- 

 ness to town and city as markets ? 



14. Even where milk is sold in stoppered bottles, how may 

 the consumer be endangered by carelessness and ignorance 



