The individual tree photos of myforestfarm project were burnt as jpg-files one by one on a separate compact disc. There are 1838 trees on myforestfarm, hence there are 1838 photos of trees and 1838 different CDs with the photos of trees in. Burning a CD with a tree photo is a materialization of a digital tree and the collection of all CDs is a representation of all trees. myforestfarm is a complicated project. Check the website www.myforestfarm.com for more information, please.