This form of lime is known to the chemists as sulphate of lime

This form of lime is known to the chemists as sulphate of lime

This form of lime is known to the chemists as sulphate of lime

Fourth, land plaster, or gypsum. This form of lime is known to the chemists as sulphate of lime. Do not forget that this last form is never to be used on sour lands. We shall therefore not consider it further.

Air-slaked lime is simply quicklime which has taken from the air a gas called carbon dioxide. This is the same gas that you breathe out from your lungs.