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The median weight-for-height of young people in Brisbane are below the 'standard' values. In most groups the weight-for-height are symmetrically distributed, suggesting that this is the range of normal variation. Only among girls aged 15-1 9 years was there an excess of 'obese' subjects.Almost all girls and young women say they want to lose weight, even though many are already well below the 'standard'. This trend is also present, but is less marked, among boys and young men. In these young people the desire for slenderness is causing unhappiness that seems out of proportion to the possible benefits of change. Health professionals should encourage a more balanced attitude to physiological variations in weight-for-height among young people.

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The distribution of selected elements in heavy minerals from the drainage systems of the Keno Hill district, Yukon is described. Most of the known mineral deposits of the district are reflected by higher than average contents of one or more elements in the heavy mineral fractions, and a number of anomalous sites in streams in the drainage net were found that merit further investigation. The conclusion is drawn that low density reconnaissance stream sediment surveys involving geochemical analyses of heavy mineral concentrates is an effective way of outlining mineralized areas. In the mountainous regions of Yukon elemental dispersion in the drainage systems is due as much to transport of particulate matter as to hydrologic processes. Traditionally heavy mineral surveys have been used to define areas enriched in metals having a low degree of chemical mobility in the supergene cycle. The present study indicates, however, that analyses of heavy mineral concentrates for the chemically more mobile elements can outline metalliferous areas. In this respect geochemical and mineralogical analyses of heavy mineral concentrates from the drainage net can complement normal stream sediment surveys and provide additional information that can aid in the interpretation of the stream sediment data. Finally, it is notable that particulate dispersion trains of hypogene and supergene minerals may be more extensive than hydromorphic trains especially in carbonate terranes where the chemical mobility of some elements may be restricted due to the high pH.