Cover with water bring to the boil, and remove the scum.

Throw in a teaspoonful of salt, and carefully remove the scum as it rises.

Then remove the scum, lower the temperature, and continue to cook at the simmering point.

Cover with about 6 pints of water, bring to the boil, and remove the scum.

To each pan, pour in 2¼ cups water, bring to the boil, and remove the scum.

Bring to the boil and remove the scum.

Bring to the boil, remove the scum, and simmer for 1½ hours, until they are very soft.

Be careful to remove the scum.

Now, it is necessary that the cabbage be covered with brine; remove the scum as it rises to the top.

Take the tomatoes out of the sugar and boil the syrup, removing the scum.

Remove the scum and let the water just simmer.

Boil all together slowly, removing the scum as fast as it rises; then strain through a sieve.

Remove the scum as it forms, taking off as much as possible before the sugar is added.

By boiling out the water, without burning, and removing the scum, it will do to feed bees.

Measure syrup, adding an equal quantity of sugar, and boil twenty minutes, removing the scum which rises to the surface.

She then put the pot on the fire to prepare the stew, but while she was removing the scum, her lamp went out.