Discusses the nature, resolution, focal length, and angle of a pinhole camera. Describes the development and some applications of the camera. Nineteen references are listed. (YP)

Reports on the successful classroom use of commercial fertilizers as growth media. (ZWH)

Recommendations are made for handling and growth of Beneckea natriegens, a rapidly growing, nonpathogenic marine bacterium which can be used with advantage to replace Escherichia coli in many undergraduate microbiology experiments. Examples of experiments and the potential value of this organism as a subject for student research projects are…

Accidentally killed animals provide biology classes with excellent study material. (Editor)

Describes the scientific work of several women, including Marie Curie, Lise Meitner, Ida Noddack, Irene Curie, Marguerite Perey, Chien-Shiung Wu, and Maria Mayer. Discusses the connections between their discoveries. Thirty-six references are listed. (YP)

Describes an alternate method of demonstrating thin film interference fringes with a laser by using a microscope slide glass cover. (MKR)

Suggests how elementary teachers can go beyond the science text and use commonplace materials to create science experiments which sharpen students' observational skills and their ability to formulate testable hypotheses. Seven experiments are outlined, using materials such as paper, cotton socks, and mayonnaise. (SJL)

Proposes a simple procedure based on an expansion of the exponential terms of Raoult's law by applying it to the case of the benzene-toluene mixture. The results with experimental values are presented as a table. (YP)

Describes the construction of an inexpensive apparatus for separating proteins by polyacrylamide gel electrolysis in the presence of sodium dodecyl sulphate. (TW)

Discusses the use of the FT-IR spectrometer in analyses that were previously avoided. Examines some of the applications of this spectroscopy with aqueous solutions, circular internal reflection, samples with low transmission, diffuse reflectance, infrared emission, and the infrared microscope. (TW)

Contains a reading list of articles published in 1985 covering 14 biological topics. Includes descriptions, procedures, and references for 26 experiments. These investigations deal with selected concepts in biology, ecology, chemistry, and physics and include computer-based instruction. (ML)

Presents three notes on new equipment, techniques, or materials of interest to teachers of physics. (HM)