Dependence of Snowfall on Temperature
D'OOGE has reported1 a correlation between amount of snowfall in inches and temperature at the time of snowfall. His data showed that maximum depth of snowfall occurred at a daily mean temperature of − 11° C. ; Bossolasco2 correlated frequency of occurrence of snowfall with temperature and found maximum occurrence at approximately the same temperature. These observers assumed that the mean daily temperature recorded at the level of observation was a reasonable estimate of the temperature at the level of formation of the snow. From the data presented, conclusions were drawn concerning nucleation of snow crystals.
DEPENDENCE OF THE FORMS OF NATURAL SNOW CRYSTALS ON METEOROLOGICAL CONDITIONS
Abstract Observations were made on the crystal structure of natural snow during a snowfall and related to the meteorological data obtainable for the period of observation. A dependence of crystal type on temperature, in reasonable agreement with the laboratory results of Nakaya, was observed. Further relations were noted which indicated the readiness with which snow-crystal observations can be related to other meteorological conditions.
Migration, Labor Mobility, and Relocation Assistance: The Case of the American Indian
This article, an example of "indirect" program evaluation, utilizes a 1/100 public use sample of American households from the 1970 U.S. census to examine family welfare levels among three categories of Indian families: (1) nonmigrant families living in traditional areas of Indian population concentration; (2) families in areas not receiving relocation assistance through the Bureau of Indian Affairs (BIA); and (3) migrant families moving to urban areas with BIA relocation assistance. The article concludes that the population of migrants receiving relocation assistance has a substantially higher level of economic welfare in both absolute and relative terms and that earnings are the principal source of increased welfare. It is suggested that such assistance might be utilized on a wider basis to assist other migrating populations.