Since the beginning of the present century much work has been done in America on tree growth, the greatest part of this being centered around growth exhibited by coniferous species. The literature is less extensive on growth studies of deciduous trees. MacDougal's work on radial growth with the dendrometer and dendrograph is too extensive for review in a paper of this type. Glock has given excellent review of results from study of annular rings. Dendrometer studies on deciduous trees in the midwest have been carried out by Beilmann, Friesner, and Lodewick. Recently Daubenmire and Peters using a new type of dendrometer have presented the results of comparative studies of coniferous and deciduous species in Idaho. Most of the radial growth studies has consisted of ring counting.