The Diocese of Trenton Celebration of the Mass in the Extraordinary Form (Traditional Latin Mass)

 
Q&A
General Questions on the Extraordinary Form
The Solemn High Mass
The Solemn High Pontifical Mass
Priest Facing the Altar (Ad Orientem)
Sacred Silence and Active Participation
The Asperges Me (Sprinkling Rite)
Incense
Holy Communion
Confession
Veils
What is that thing with smoke coming out of it on a chain?

That is a thurible. It is a metal censer held by a chain. Incense is burned in it for venerating holy objects and people during Catholic worship. This would include the altar, relics, the crucifix, the offerings at Mass, the Blessed Sacrament itself, the Gospels, the clerics, the faithful and the coffin at a Requiem Mass. The higher the dignity of the person or object, the more swings from the thurible it receives. The incense is kept in a vessel called the boat before it is placed in the thurible.