THE FARM, AND OUR FOOD SUPPLIES 125 



7. Of what use to the hen are feathers ? Of what value 

 are feathers for household uses ? How do hens keep clean ? 

 What provision is made for new plumage? 



8. In what respects is the foot of the hen different from 

 (a) the foot of a horse ; (6) a man's foot ? How many toes 

 on a hen's foot? To what uses do hens put their claws? 

 The part of a hen's leg above the toes (the part that is cov- 

 ered with scales) corresponds to what part of the human 

 body ? Why do not fowls fall off when asleep on perches ? 



9. What is the purpose of (a) the comb ; (b) the wattles ? 

 What significance in their changes in color ? 



10. Explain differences in color in chicken meat. 



EGGS 



1. Remove the shell from an egg that has been boiled 

 in some "Easter dye" solution. What is the significance of 



TH/MEFt ALBUMEN^ ^^^ ^^^^^-GEf?M SPOT, OR DISC. 



(<T*) \x^>r^^c- %T * ***** 



TH/CKER 4LBVMEN- 

 (WH/TE) 



CMLAZ*' 



CONCENTRIC 

 MNER MEMBRAMt ^ 



^SHELL 

 FIG. 57. The parts of an egg. 



any coloration through the shell ? Recall why canned goods 

 do not spoil. What can be done to the shells to keep eggs 

 for a long time? What conditions favor the decay of all 

 animal matter, including eggs? 



