Research supported by a grant from the National Institute of Health. (DD)

Ten- and 11-year-old boys and girls were taught to solve Inhelder and Piaget's pendulum problem and the results of the experiment replicated their expectation that unaided 10- and 11-year-olds do not often solve the pendulum problem. (Editor/RK)

A brief summary of the state of agricultural research in the United States. The agricultural research system is finely attuned to the immediate needs of its clients, as evident in its response to the attack of corn blight in 1970. (JR)

Research supported by grants to the University of Minnesota, Center for Research in Human Learning, from the National Science Foundation, the National Institute for Child Health and Human Development, and the Graduate School of the University of Minnesota. (DD)

The use of 10cc. syringes in high school chemistry experiments can reduce the expense of equipment and lead to imaginative experimental designs. Describes the equipment and experimental procedures for four experiments utilizing syringes. (JR)

Describes some of the causes and consequences of particulate air pollution. Outlines the experimental procedures for measuring the amount of particulate materials that settles from the air and for observing the nature of particulate air pollution. (JR)

Describes methods using basic trigonometry which enable secondary earth science students to make astronomical calculations. The literature and mathematics available to high school students allow calculation of the earth's dimensions, which in turn permit calculation of the sun's distance. Once the sun's distance is known, stellar distances can be…