The report considers those factors permitting establishment of the relationship between glacier mass balance, water balance, and heat balance and includes an overall assessment of the controlling meteorological parameters. The main analyses concern observations made during the period July, 1965 through mid-September 1967, with supplemental data for selected periods during 1968 and 1969 as they pertain to long-term trends affecting the regime of the Lemon and Ptarmigan Glaciers in southeastern Alaska. The study provides information on a uniquely well-defined and completely self-contained glacier system ideally situated as a control location in the long-term glacio-climatic studies since 1946 on the Juneau Icefield, as well as for comparison with other coastal glacier systems originating in the complex of contiguous icefields in south and southeastern Alaska.