Baptism by immersion is not necessary; affusion and aspersion are acceptable modes. Aspersion is a method used in baptism as an alternative to immersion or affusion. Affusion and aspersion tend to be practiced by Christian denominations that also practice infant baptism. However, when a person could not be immersed, baptism by aspersion or affusion was performed. The Wet Taxis, Paris Green and The Aspersion Caste. Tillett and The Aspersion Caste toured Australian and then Europe. It was preceded generally by the blessing and aspersion of water on Sundays. Frost can be countered by heaters, and aspersion by sprinklers to form an ice layer. The aspersion stuck, as did the conjunction of north-side theatres. In aspersion, an aspergilium may be used to place the water on the skin.