Offers selections from papers which illustrate accidents, epidemics, and bad practices which could be used as background material for lessons on laboratory safety. Advocates the need for instruction on pathogenicity and infectivity. (ML)

Suggests how modifications on a mini-compressor can result in a low-cost vacuum filtration system for use with suspended sediments in the field or laboratory. Explains and illustrates the changes needed to make the apparatus efficient and servicable for providing data for mass balance, geochemical exploration, and environmental studies. (ML)

The study investigated the effects of an adapted science curriculum featuring vocabulary exercises and framed outlines on the performance of 202 regular and mildly handicapped seventh graders. Data generally showed that the scores of handicapped as well as nonhandicapped students were better when the chapters were modified. (Author/CL)

Describes the equipment and procedure necessary for the production of good quality slides or prints from books using a 35mm single lens reflex camera. (GS)

Uses the intersecting parabola model to derive an equation that relates the observed free energy of activation for a slow proton transfer to the overall thermodynamic free energy change in the reaction. (MLH)

Discusses the preparation and properties of nitrogen oxides and the reaction of magnesium with nitric acid. (MLH)

Describes four toxic effects of red tide microorganisms and the economic impact of the red tide bloom on seafood and related industries in several locations of the U.S. (MLH)

Describes an instructional approach for teaching the cause-and-effect relationship between the qualities of atoms and the properties of their chemical compositions. Discusses atomic structure, ionization energies, homonuclear and heteronuclear bonding, and bond dissociation. (MLH)

Discusses the fact that heat only exists at the boundary of a system as energy is being transferred because of a temperature difference between the system and the surroundings. Points out that many texts incorrectly refer to heat as a system component. (MLH)

Inquires into the individual names and dates which are associated with the various perfect gas laws on the basis of published and historically researched works. Indicates the presence of eight features in giving a scientist credit for a scientific discovery. (CC)

Describes how teachers can use the Fry's Readability Graph to determine the reading level of textbooks in use and those being considered for adoption. Provides a listing of the reading levels of selected junior high school science texts. (JR)

Presents theoretical fundamentals of sideways forces exerted on a cricket ball, an aerofoil, and a yacht, involving the properties of boundary layers and a description of velocity and circulation. (CC)