114 LESSONS IN AGRICULTURE 



4. What would have been the profit if they had 

 laid 120 eggs each, instead of 80 ? 



5. Ask pupils to furnish data for at least twenty 

 other similar problems. 



LESSON XXXIV 



1. A STUDY OF FEATHERS 



Have a fowl in the schoolroom a few hours before the 

 lesson is given. Encourage the children to find out as 

 many facts as they can for themselves before the school 

 opens for work. Direct the observations of the pupils 

 by a few questions, as : the kind of feathers ; the location 

 of the different kinds ; any part of the body not covered 

 with feathers. Suggest a little competition by asking 

 which boy or girl can give the greatest number of facts 

 from his observation of the feathers of the fowl. 



At class time, the teacher should remove the fowl from 

 the coop and hold it firmly by the legs to prevent fright 

 and injury. Allow the children to come near. 



1. Have the pupils feel the difference between the 

 heat of the fowl's body beneath the feathers and on the 

 outside of the feathers. Explain. Bring out the point 

 that the feathers are non-conducting. What purpose 

 does this serve the fowl ? 



2. Spread the wings and tail so that the different 

 feather sections may be seen. Note that in the wing 

 and tail, one feather overlaps the other so that each 

 feather braces the other in flight. 



3. Observe the lighter wing feathers (the sec- 



