He is studying about orpiment, which was used in ancient artworks.

This old medicine box contains realgar, a rare medicine.

This old medicine box contains realgar, a rare medicine.

I go to school every day.

Please use this drug according to the doctor's instructions.

This flower is very rare.

He is interested in the history of the past.

This old building tells the history of our town.

This old house is the one where my grandparents lived.

What is in this box?