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- 2 - 7. The movement and ecological effect of silver iodide. Each of the above sub~projects is reported on separately, but the Discussion Section (p. 365) includes an attempt to integra~e the results whenever it seems reasonable and logical to do so. The contract between the Bureau of Reclamation and the University of Wyoming was established in September, 1971, and shortlyu thereafter a Cooperative Agreement (No. 16~252-CA) was established between the University and the Rocky Mountain Forest and Range Experiment Station (U. S. Forest Service). Nearly ail of the Medicine Bow Mountains lie within the Medicine Bow National Forest, and Forest Service scientists (Thilenius and Ward) worked closely with University scientists in developing the research program. Numerous meetings were h~ld during the winter of 1971-72 in order to select study areas and evaluate research design. Considerable effort was devoted during ~his time to the synthesis of existing knowledge about the ecosystems.of,the Medicine Bow Mounta i .ns. Field work began as soon as possible in 1972, and continued until late summer, 1974. Most of the data were gathered in the spring ar;'d summer, but some fiel~ work was done d~ring the winter ~s well. Several projects were ~caled down or eliminated in early 1973 due to' an unexpected budgetary restriction, however a subsequent addition to our budget in late 1973 and a new agreement (Amendatory Agreement No. .. . I) with the Bureau led to a 7 month extension. We have been able to accomplish the principal objectives of our original proposal, though some questions remain unanswered about the ecological effects of cloud seeding with silver iodide. We identify these unanswered questions along with our res~lts. - 'l .. ~ . .. . - - -. - .... - - - ~.'. - '~ -