Discusses changes in the crystal structure of iron and steel when these materials are heated. Focuses on observations related to an experiment in which a 60-inch length of piano wire (No. 29 steel wire) is heated and then cooled. (JN)

Describes two experiments that illustrate basic ideas but would be difficult to carry out. Also presents activities and experiments on rainbow cups, electrical charges, electrophorus calculation, pulse electrometer, a skidding car, and on the Oersted effect. (JN)

Describes three computer programs designed to control and execute standard methods for paired associate learning. They can be used in classroom demonstrations or laboratory exercises in experimental psychology. (RM)

Discusses a computer simulation which: (1) describes an experiment investigating F=m/a; (2) generates data; (3) allows students to see the data; and (4) generates the equation with a least-squares fit. (JN)

Describes three computer programs which operate on Apple II+ microcomputers: (1) a menu-driven graph drawing program; (2) a simulation of the Millikan oil drop experiment; and (3) a program used to study the half-life of silver. (Instructions for obtaining the programs from the author are included.) (JN)

Describes an undergraduate experiment for the potentiometric determination of urea based on the physical entrapment of urease on the tip of an ammonia gas sensor. An advantage of this technique is the ease with which the ammonia electrode can be converted to a urea electrode. (JN)

Provides background information on and experiments for determining the spectra of streetlights. Procedures for taking photographs of the spectra produced are included as well as discussions of sodium and mercury spectra. (JN)

Describes a variety of laboratory experiments including carbon dioxide reduction, animal respiration, atmospheric pressure determination, and others, that can be performed using discarded syringes. (GS)

Describes an experimental method of isotope dilution analysis that determines radioactive compound volume rather than mass. Suitable for degree-level biology and chemistry students. (MLH)

Describes an experiment that utilizes an acidic ion-exchange-chromatography column to separate two cobalt complexes. (MLH)

Presents an undergraduate experiment that uses ion-exchange techniques to recover the silver chloride precipitate from argentimetric determinations of chloride ions. (MLH)

Discusses some current research on hemoproteins, describes the process of metal replacement in hemoproteins, and reviews the preparation of cobaltmyoglobin. (MLH)

Describes an experiment in which two organic compounds having the same nmr spectra are identified by their differing mass spectra. (MLH)

Describes an experiment in which the photooxidation of methionine using free methylene blue as the sensitizer is applied to the isolated amino acid or to the methionyl residues of a complex polypeptide. (MLH)

Discusses ten methods for measuring the thermal expansion of solids and the way in which the expansion coefficient relates to other properties of matter. (MLH)