Detecting the earth's electricity

Article Abstract:

Amateur scientists may be able to design their own electric field detector through the use of coaxially-mounted slotted metal disks. This home-built device follows the design of the traditional field mill in order to monitor various fluctuations in the earth's electrical field.

Measurement, Electric fields

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Calibrating with cold

Article Abstract:

The importance of calibrating a laboratory thermometer to ensure accurate temperature readings is emphasized. A procedure to calibrate such an instrument using alcohol, carbon dioxide and mercury is described.

Maintenance and repair, Measuring instruments

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How to rear a plankton menagerie

Article Abstract:

A description of the apparatus needed to rear plankton for animal food or for study is presented. The use of micro algae grow kits and liquid silicate solutions is discussed.

Growth, Plankton

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