62 
MANUAL OF NATURE STUDY. 
climate? Why? Would it be good food for a 
student ? A minister ? A teacher ? A day lab¬ 
orer? Why? Winter or summer food? Why? 
Call attention to the fact that some hogs are 
afflicted with trichina , and on that account it is ex¬ 
tremely necessary to cook pork 'thoroughly done. 
Salted meats are not so digestible and nutritious 
as fresh meats. Milk is the best food of all. It 
contains casein , the stuff that cheese is made of, 
fats, the stuff that butter is made of, and a sugar, 
known as “sugar of milk.” But milk, to be health¬ 
ful, must come from good healthy cows that are fed 
upon good food and water. A disease in water or 
food, when drunk or eaten by the cow, may be 
transferred to the milk and hence to the boy or 
girl who drinks it. Typhoid fever has been con¬ 
veyed in that way to persons using the milk. But 
pure milk, cream and all, will support life longer 
than any other food. 
Eggs are highly nutritious, but when fried in 
grease, they are regarded as less digestible. 
Wheat flour owes its value to gluten contained in 
it. 
In baking bread, yeast is used to cause the bread 
to rise. Teacher should explain how this is done. 
Why can we not make as light bread from corn 
meal as wheat flour ? (Small quantity of gluten , 
