Demonstration Meter with Changeable Interscapes Experiment kit Bell (Vacuum) Jar with stand

Bell (Vacuum) Jar with stand base and with Electric Bell

is mounted on an insulating support rod with a stable base

This real dissected specimen of Earthworm has been embedded in plastic for observation and study

Literacy practice for phase 2 of the letters and sounds program

sound conduction of various substances

Demonstration Meter with Changeable Interscapes Experiment kit Bell (Vacuum) Jar with standA versatile instrument and demonstration meter that can be converted to an A. C., or D. C. voltmeter or ammeter with selection of various ranges for each mode. With a high quality moving coil, spring controlled movement with full scale deflection of 5 mA or 100 mV D. C. The long pointer has a spade end and is clearly visible from a distance. Fitted in case with glass front and back. The instrument can be used with different dials to give different