The grape-juice is then drawn off from the skins and seeds and left standing in a warm place.
Bubbles soon begin to rise and cover the top of it with froth. The juice is all in motion.
Picking grapes and making wine.
If the cook had wished to use this grape-juice to make jelly, she would say: "Now, I can not make my grape-jelly, for the grape-juice is spoiled."
WHAT IS THIS CHANGE IN THE GRAPE-JUICE?
The sugar in the grape-juice is changing into something else. It is turning into alcohol and a gas[A] that moves about in little bubbles in the liquid, and rising to the top, goes off into the air. The alcohol is a thin liquid which, mixed with the water, remains in the grape-juice.
The sugar is gone; alcohol and the bubbles of gas are left in its place.
This alcohol is a liquid poison. A little of it will harm any one who drinks it; much of it would kill the drinker.
Ripe grapes are good food; but grape-juice, when its sugar has turned to alcohol, is not a safe drink for any one. It is poisoned by the alcohol.