62 DAIRYING 



42. At what age does a cow begin to decline in milk production 

 and richness of milk? 



43. Is it necessary to fatten and sell good dairy cows after an 

 abortion period, and what may be the loss in milk during- an 

 abortion period? 



44. What effect on milk flow is caused by testing cows for tuber- 

 culosis? 



45. Why is not advisable to feed the milk of one cow to a baby 

 and what effect on milk has the sickness of a cow? 



46. What effect have fly protecting medicines on milk flow and 

 what is a good protection from flies for cows? 



47. In what way does scant feed during a dry season effect the 

 composition of milk and yield of cheese? 



48. How much money could a farmer afford to use in buying grain 

 for his cows during drought if he kept ten cows that gave 30 

 pounds of milk each per day and cheese is worth 15 cents per 

 pound? 



49. Does it pay to warm water for cows in cold weather? 



50. In what part of a cow's udder is the most milk produced? 



51. Are the teats diagonally opposite on a cow's udder on the 

 same gland, 'and which of these two will give the most milk 

 when milked first.? 



52. Give proof that milk is not filtered from the blood. - 



53. What determines the richness of a cow's milk? 



54. How are thin-milk-giving cows obtained? 



55. What muscles of the udder are under the control of the cow, 

 and what control over milk secretion has the cow? 



56. What are the alveoli? 



57. How may the activity of the milk gland be stimulated? 



58. What are some of the characteristics of a dairy cow that are 

 peculiar to the breed to which she belongs? 



