Discusses chemical experiments on determination of triglyceride concentrations in biological samples by using 1,4-dihydro-3,5-diacetyl lutidine as a basis in absorbance measurements. (CC)

Describes a simple method of demonstrating the Bernoulli effect, by spinning a length of rubber tubing around one's head. A manometer attached to the stationary end of the tube indicates a reduction in pressure. (JR)

Outlines several exercises suitable for elementary science classes which may be used to illustrate objective experimental analysis. (JR)

Describes experiments using crude isolated chloroplast fractions which demonstrate some aspects of the photosynthetic light requiring process and a number of factors affecting them. These experiments are suitable for senior high school and college courses in biology. (JR)

Discusses experimental evidence for the existence of organic material in the solar system prior to the earth's formation. Indicates that the earth could have received much of its organic compounds from meteors falling on its primitive surface. (CC)