Describes an undergraduate organic chemistry experiment which illustrates the use of organoboranes in organic syntheses and provides for the anti-Markownikoff hydration of alkenes. (MLH)

Describes a circuit (utilizing simple equipment) which can be used to measure the period of a harmonic oscillator. (CP)

Provides schematics and discussion needed to construct an inexpensive device for classroom demonstrations involving beats and interference. (CP)

Traces the inception of laboratory activities in the instruction of physics in American secondary and higher education institutions. In particular, the impact of Edwin Hall on secondary school physics instruction is described. (CP)

Describes a method to experimentally determine the longitudinal shift of a microwave beam at total internal reflection. Suggests that the activity be incorporated into an undergraduate laboratory program due to its ease in set-up and clarity of results. (CP)

Describes an attempt to incorporate research into laboratory work in an introductory ecology class and a senior seminar. The investigation involves the examination of rhythms of food consumption and circadian activities in humans. (GS)

Presents five experiments in which the unknowns for analysis are prepared by the students themselves, the analysis forming an essential part of the investigation. (MLH)

Describes experiments for the undergraduate organic chemistry laboratory which demonstrate reactions and syntheses that involve free - radical intermediates. (MLH)

Describes the use of pieces of equipment such as the Oxygen Temperature Probe (OTB) commonly used by fisherman, for research field trips. The instrument can be used in classroom experiments as well. Other equipment described includes the electronic thermometer and oxygen monitor. (EB)

Construction of a laboratory area suitable for laser experiments and the creation of holograms is described. (CP)