6 THE TEACHING OF POULTRY HUSBANDRY 
literature, for much help can be secured by studying correlated 
subjects, such as zoology, physics, and chemistry. 
Home Experiments.—In all types of instruction home practice 
and experimental work should be encouraged. Each student 
should be urged to take an interest in the management of the home 
flock, where possible, starting with the elementary work. This 
will enthuse the student and create an interest in the work. As 
the student progresses he may keep a record of the egg yield, cost 
of feeds, and production of the home flock, and from these data 
the profits may be calculated. 
