words used which the pupils would not be
likely to understand; for instance, oxidation, combustion, solubility,
etc., and many of the terms used in the analysis, such as
fermentation, casein of milk, albumen, cellulose, etc. In order to
keep the attention of pupils fixed on a subject, frequent
illustrations and comparisons should be made.

Questioning is one of the best methods of riveting attention, and as
every teacher has not the faculty of asking questions, a few
suggestive ones are given which may prove helpful.

Why do we eat food?

What is nitrogenous food?

What is its chief office?

Where is it to be found?

In what section of vegetable kingdom is this compound abundant?

What is the chief nitrogenous compound in meat and eggs?

Of what is it composed?

Why do we call these compounds nitrogenous?

Do they serve any other purpose besides building up flesh?

Which are the most important heat-giving compounds?

What is the proportion in food they should bear to the flesh-forming
compounds?

What other compounds are necessary to form a perfect food?

Give their use?

Where are they to be found?

What is common salt?

Where is it found?

Why do we use it?

Give the three digestive juices.

What kind of mineral matter do we find in vegetables?

Why should potato parings, leaves and stalks of cabbage not be put in
the dust bin or garbage pail?

What should be done with them?

Which are the most important warmth-giving foods?

Give another name for these foods?

Why are they so called?

What is combustion?

How do these foods produce force, etc.?

What other elements do these foods contain?

Why are fats and oils more valuable as heat-givers than starch or
sugar?

What elements unite and form water?

What is the proportion of water in the body?

Give its use?

Explain the difference in the digestion of starch and fat?

Why does starch need cooking?

To what kingdom does it belong?

Which section is of most value?

How is starch changed into sugar?

What changes food into blood?

What gives the red color to blood?

What mineral helps digestion most?

What is sugar?

What causes sugar to ferment?

What is the result?

Where is it to be found?

What are food adjuncts?

Of what value are they?

Give the names of combustible nutrients.

Give the names of incombustible nutrients.

For a substance to undergo combustion, what must it contain?

What supp