It was used in steam engines and heating your house and also cooking.
Discuss the purification methods used in the olden days
It all depends on what sense you are speaking of; because in the "olden days," as you say, candles were used in order to provide some light in dark places.
The moon and stars.
cotton wool
they used sun dials
coalmines are somewhere in the olden days where they used to make coal or bring coal from underground
I don't see why not. They used coal in the old cookstoves in the "olden" days.
Discuss the purification methods used in the olden days
Coal stoves, Wood stoves, Wood fires.
in the olden days we used smoke,light reflection and beacons
Discuss the purification methods used in the olden days
Cloth.
on the water.
In the olden days there were no banks so people used to keep their money under their heads
letters
guns and cannons
In the olden days it was used for entertainment.