There can be no progress without research. No industry can continue to meet the present day competition unless it is continually developing new products or new and better methods of production. This fact is well illusb·ated in the fi eld of plasticsa recent product developed by research. The importance of this research is emphasized by the financial budget of such indush·ies as Dow Chemical, DuPont, and others. It is of no less importance in the field of range management.