Sentence:  SURBATING; a Diſtemper in a "Horſe", who is ſaid to be ſurbated, when the Sole is worn, bruiſed or ſpoiled by travelling without Shoes, or with ill ſhoeing: ... take Frankincenſe, and rolling it in a little fine Cotton Wool or <WSD>Bombaſt</WSD>, with a hot Iron melt it into the Foot betwixt the Shoe and the Toe, until the Orifice, where the Blood was taken away, is fill'd up; ... 
Meaning of the word marked with <WSD> tags:  Cotton, or cotton wool.