21.   She uses a process called grisaille, painting first in shades of gray, then adding color through layer upon layer of glaze.

22.   Stack cakes are assembled from layer upon layer of thin, biscuitlike cakes mortared together with apple filling.

23.   Still, the cast and director have found layer upon layer in the conflicts that sweep through the Rice household like an endless series of duststorms.

24.   The peak drops away into layer upon layer of mountains that fade into the horizon.

25.   The result, in some spots, is layer upon layer of well-preserved penguin remains dating back thousands of years.

26.   Then he offered another model of sustained line in the finale, with layer upon layer building to a stunning conclusion.

27.   There are layers upon layers of meaning attached to every word, to every gesture, to every action.

28.   They arrive at the giant tower that contains layer upon layer of cubicles enclosed in glass and take the elevator to her floor.

29.   They were examining layer upon layer of the remains of human life.

30.   They are a godsend to neophytes and the parents of young players reduced to tears by the layer upon layer of variables in the latest games.