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Hundreds of families may make their homes in one apartment house.

In these stores people who live in the city can buy food,clothing and supplies of everything they need.

Some stores sell food, some sell clothing and some sell furniture.

In most cities there are great stores which sell almost everything.

They supply these families with what they need.

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People in the apartment houses have no place to keep a supply of food.

They may have enough food in an icebox to take them through a day or two,

but on most days they buy meat and milk and fruit and other things they need from a store near their home.

Many families have supplies of milk and other foods sent to their houses every day.

People with children in the family may buy four or five quarts of milk at a time.

Here is a family with five persons in it: a husband, a wife and their three children.

The man is the woman's husband and she is his wife.

They have been married ten years.

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A milkman put the milk outside their door in the early morning.

Milkmen started their work in a great city before it was light.

In some parts of the world milk is measured in gallons.

Milk is put up in pint and quart bottles or in cartons.

In other parts of the world milk is measured in liters.

A liter is a little more than a quart.

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In some factories food is put into cans.

It is canned.

These are machines in a canning factory.

Most foods today can be bought in cans.

Food stores sell canned soups,meats, fruit and vegetables.

Food is canned to keep it from the air.

When air can get at it, it quickly goes bad- -if it is not kept very cold.

Canned food that has gone bad is poison.

Bad food is very bad for people; it poison them.

If they take much of it they may die.

After a person dies, he is dead.

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People can have only a few cans of meat and fruit and other things "on hand," as we say, on their shelves.

They may have a cupboard with two or three shelves of canned food,but most people have no room for more than that.

If supplies do not come into the city day by day their supply of canned food is quickly used up.

Many solid and liquid foods are kept in cans.

Gas for cooking can be canned and piped to the gas cooker from the can for use.

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Some people working in cities have no time or place to cook for themselves.

Many of them go out to restaurants for all of their meals.

There are many restaurants in a great city, all needing supplies of food every day and and some of them cooking for great numbers of people.

A good restaurant keeps its food clean and does not let flies get at it.

If flies get on food they may poison it.

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Here is a supply of meat, vegetables,milk,butter,cheese,bread,fruit and eggs,

enough for a family of four persons for one day in North America.

If people do not get enough food of the right sorts, they will not keep well.

They will not be able to work or play well.

Fresh food must be supplied to a city day by day.

It will not keep good very long if it is open to the air.

If uncovered, If may get flies on it.

Flies get on dirty things.

Their dirty feet make food dirty.

Canned food will keep good for a long time.

It can be stored.

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Grain and meat and milk and fruit and vegetables must be transported into the cities of the world day and night all through the year to feed its city populations.

Much of this food comes great distances in ships, trains or trucks, and must be kept cold and clean all the way.

Today some of it is transported by plane.

This is a bag of grain.

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The nineteen million people in and near New York City in 2004, to give one example,

were drinking seven million quarts of milk a day from more than a million cows on fifty thousand farms,

some of them hundreds of miles away.

The price of a bottle milk in the city is more than twice as much as the farmer gets for it.

The milk must be kept clean and cold and put into bottles and taken to the stores and houses in the city.

City governments see that milk is kept clean and has enough butterfat in it.

Some city-born children have never seen a cow and have to be taught where milk comes from.

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Milk is the best food there is for babies.

It is good for children and for older people too.

It has in it fat, which gives energy, and it has the most important of the materials needed for building up our bodies.

Milk makes strong bones and strong teeth too.

It is good for a child to drink two or three glasses of it every day.

In addition,milk has it most of the vitamins which are needed to keep us healthy.

Vitamins are discovery of the twentieth century.

Two hundred years ago no one knew anything about them.