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The article discusses raiders and slave-hunters in seventeenth and eighteenth century Brazil known as Bandeirantes. It notes that these pioneers were descended from Portuguese colonists and Indians and comments on their journeys to the west, called entradas, or entries into the unknown, to find Indian slaves. The author also examines their discoveries of gold and diamonds in Brazil and explores their relations with Jesuits. Portugal's colonial policies are also considered and the geographical and economic legacies of the Bandeirantes are addressed.

The oxidation characteristics of pure hot-pressed titanium carbide and titanium boride (TiB2) have been studied in the range 300°–1000° C.Titanium carbide shows a very marked peak in the rate of oxidation at ∼450° C., the oxidation product at this temperature being anatase (TiO2) which is powdery and non-adherent; the oxidation thus follows a linear law. Above ∼700° C. the rate increases rapidly again and is approximately parabolic. The scale in this case consists of a dense crystalline film of rutile.The oxidation of the boride is less rapid than that of the carbide over the whole temperature range but it, too, shows a slight peak at 450° C. The oxidation tends to be parabolic at higher temperatures. The nature of the oxidation products has not been determined.

Periodic whole-body counting and excretion analyses were performed on a subject who had incurred a 4- to 7-microc internal dose of Cs137. Data are presented correlating urine and fecal excretion with whole-body counts. A single exponential retention equation was obtained during the period of study, which was from 189 to 582 days after exposure. The retention half time during this period was 80 days. Comparison with the work of other investigators is included.