How many slices of bread are required to make 2 cupfuls of crumbs?

How many slices in one loaf of bread?




LESSON III

FUELS AND COMBUSTION--SAUTED AND BAKED SQUASH


FUEL.--In order to cook foods, heat in some form must be applied. This
heat is obtained usually by burning some substance. Thus the first
requisite for obtaining heat is something to burn, _i.e._ a fuel. The
fuels commonly used in households are,--wood, coal, kerosene, and gas.
Although electricity is not a fuel, its use in cooking is so well
established that it should be mentioned as a source of heat.

HEAT; KINDLING TEMPERATURE.--There are fuel substances everywhere,--paper,
cloth, wood, etc. These materials do not burn unless heated; even gas does
not burn by simply turning on the stopcock. But if a piece of paper is
placed in contact with glowing iron, the paper burns. It burns because it
is heated. If the blazing paper is placed in contact with kindling wood
and coal, the kindling wood soon begins to burn because it is heated by
the burning paper. The coal burns when it is heated by the burning wood.
All fuels must be heated before they will burn.

When one thinks of the ease with which paper "catches fire" and of the