Combinatorial and computer analysis of random mosaics.

Mosaics are arrays of two or more alternatives which may be in one, two, or three dimensions, and for each of which there are many biological examples. Before we can discuss the biological material intelligently, it is essential to determine some of the parameters of purely random mosaics. The most obvious attributes of mosaics are patchiness, and the variation in patchiness. I shall use the terms run, patch, and cluster to describe aggregates of like cells in one-, two-, and three-dimensional mosaics, respectively.