Discusses what can occur in a laboratory if a cylinder valve is separated from a compressed gas cylinder. (MLH)

Describes the construction and application of a device small enough to be worn on a worker's clothing that can monitor exposure to mercury. (MLH)

Presents experiments that avoid using mercury by using pressure transducers to investigate the gas laws. (Author/JRH)

Describes a simple device to improve the set retrieval of spilled mercury. (SL)

Describes a demonstration involving the controlled combustion of a mixture of metals with black and smokeless powder in a small Erlenmeyer flask. Also describes demonstrations using a device that precludes breathing of hazardous vapors during class demonstrations; the device is easy to transport and use in rooms without sinks. (JN)

A survey of freshman chemistry laboratory manuals identified 15 questionable laboratory procedures, including the use of potentially hazardous chemicals. Alternatives are suggested for each hazard discussed (such as using a substitute solvent for benzene). (SK)

Describes a method for the preparation of hydrogen gas which is safer than conventional procedures. The procedure and equipment are described in detail. (BR)