Demonstration Meter with Changeable Interscapes Experiment kit Easy-to-rotate knobs help provide extra

Easy-to-rotate knobs help provide extra leverage to easy and accurate adjustment

Sirrer for the inner vessel

Water Cycle Chart with roller

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

75-inch Diameter

Demonstration Meter with Changeable Interscapes Experiment kit Easy-to-rotate knobs help provide extraA 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