A low-cost personal computer was interfaced with a Benedict-Roth type spirometer to simplify laboratory testing for pulmonary function. Data analysis methods and test reliability are discussed. (PP)

Social behaviors of 10- and 12-month-old infants were studied as a function of experimental context (home and laboratory) and experimental history (home rearing and day care). Results suggested that the experimental context influenced infant social behaviors. No differences attributable to rearing condition as a main effect were found. (Author/SB)

Describes the construction and use of two pieces of equipment for teaching materials related to the propagation of an electric field and the parallel plate capacitor. (GS)

Discussed are various types of electronic laboratory balances. (RH)

Describes a study showing that the results of a practical laboratory examination correlated more positively with written examination scores than the teaching assistant's evaluation of laboratory technique. (MLH)

Describes the development and provides an example of the type of student investigation that is now considered sufficient for the practical part of the 'A' level physics examination. (GS)

Described are available electronic laboratory balances. Information was supplied by the manufacturers or importers. (RH)

A variety of materials are described including spectrophotometers, chromatographs, voltmeters, recorders, and simple laboratory equipment. (RH)

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

Discusses a multipurpose organic chemistry experiment that illustrates a variety of reaction types within a single, three-hour laboratory period. (MLH)

Describes the determination of vanillin and of other aromatic aldehydes by amperometric titration with 2, 4-dinitrophenylhydrazine. (MLH)

Describes a method in which metals can be identified by the direction of the e.m.f. generated when the junctions in a circuit containing two dissimiliar metals are at different temperatures. (MLH)

Describes the chemistry of dyeing, including acid, basic, vat, and disperse dyes. Includes laboratory experiments. (MLH)

Discusses a laboratory experiment in which uranium is isolated by the reduction of uranyl acetate. (MLH)

Describes the synthesis of a sweetening compound that requires seven laboratory periods of three-hours duration. (MLH)