LESSON XLI.
THINGS FOUND IN THE EARTH.
The earth contains many things that are of great value to us. These we must find and dig out.
The coal we burn in our grates to warm us; iron, from which so many useful things are made; gold, silver, tin, lead, and copper,--all come out of the earth.
But these are not all the valuable things hidden away in the earth.
From salt wells we get a great deal of the salt used on our tables. From oil wells is obtained the oil we use in our lamps to give us light. Diamonds which sparkle so beautifully, and the stone we use in building, are also taken from the earth.
| OIL WELLS |
Coal, iron, gold, silver, lead, tin, copper, mercury, and salt are called minerals.
The opening dug in the earth from which minerals, except stone, are taken; is called a mine.