REVIEW 549 



REVIEW. 



1. Discuss the recent progress made in judging fowls for egg production on 



the basis of external characters. 



2. What is the relative importance of health and vigor? 



3. Describe the color of pigment changes in a bird's body due to laying. 



4. Which sections bleach first and what is the sequence of future bleaching? 



5. In what order does the yeUow color reappear? 



6. What should be the condition of the abdomen in a heavy layer? 



7. How does the pehdc arch differ in a heav}^ and poor laying hen? 



8. What is meant by lateral or sternal processes? 



9. What distinction in head points can be made relative to productive abiUty? 



10. Discuss the relation of time of moult to production. 



11. AMiat are the two most important results to be accomplished by appl3'ing 



the selective principles to practice? 



12. "VMiat is the aim of a culling campaign and how should one be run? 



13. How many birds would j'ou expect to cull from an average flock about 



the last of July? 



14. Describe the best and handiest method of culhng a flock. 



15. Describe and give possible usage of a culling chart which enables the 



plotting of a curve to show the condition of a single bird. 



16. What, if any, are the possible errors in culling for egg production by external 



characters? 



17. How does the egg production of a hen compare with the length of her rest 



period? 



18. What is the possibihty of hens culled early coming back into profitable 



laying again in a short time? 



19. \Miat do you consider to be the advantage of culling as a part of the 



operations of a commercial poultry farm? 



References. — Selection of Laying Hens, by Blakeslee, Harris, Warner and 

 Kirkpatrick, Connecticut Bulletin No. 92. How to Select Laying Hens, 1 y 

 Kent, Cornell Extension Bulletin Xo. 21. The Histological Basis of Shank 

 Color in the Domestic Fowl, by Barrows, ]Maine Bulletin 232. A Study of 

 Egg Production in the Domestic Fowl, by Card, Connecticut Bulletin No. 

 91. The Moulting of Fowls, by Rice, Nixon and Rogers, Cornell Bulletin 

 No. 258. Selection, The Basis of Improving the Poultrj' Flock, by Lewis, 

 New Jersey, Hints to Poultrymen, Vol. 5, No. 12. EUminate the Slacker Hen, 

 by Aubry. New Jer.'^pv, Hints to Poultrvmen, Vol. 6, No. 10. How to Tell 

 the Age of Hens, by Victor Fortier, Dominion of Canada Bulletin No. 16. 



See 1923 edition of American Standard of Perfection for "Economic 

 Qualities of Standard Bred Fowls." 



