A stack of glass shows the amount of leaves from three different species of tree.


Rosenwald Wolf Gallery, University of the Arts, Philadelphia, Pennsylvania


Sandblasted glass

6 inches tall x 12 inches wide  x 4 inches deep


The leaves of three different young trees--oak, maple, and beech--were recorded and sandblasted onto glass. Each leaf became a single plate of glass.  Stacked up from the largest to the smallest, Leaf Tally creates a graph of how many leaves are produced by different saplings. The maple has the most biomes per year.

Stacked together, the glass plates represent all the leaves that had been produced by the young trees that year.