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Chemistry2
Overhead Projectors2
Science Education2
Visual Aids2
Instructional Materials1
Projection Equipment1
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Journal of Chemical Education2
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Alyea, Hubert N.2
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A TOPS Projector-Adaptor (Model 2).
Peer reviewed Peer reviewed
Alyea, Hubert N. – Journal of Chemical Education, 1979
Presents the plans for constructing a mode 2 TOPS Projector-adaptor, which costs one-half that of a model described in an earlier article. The author uses a step-by-step approach to the project. (SA)
Descriptors: Chemistry, Overhead Projectors, Science Education, Science Equipment
TOPS Projector Devices.
Peer reviewed Peer reviewed
Alyea, Hubert N. – Journal of Chemical Education, 1978
The construction of a device is described which converts an ordinary horizontal-stage overhead projector into a vertical-stage projector. The parts cost $60 and seven hours of labor are required. (BB)
Descriptors: Chemistry, Instructional Materials, Overhead Projectors, Projection Equipment