Demonstration voltmeter after Ferraris

Voltmeter after Ferraris, with resolved field. The instrument posseses a degree scale from 0 to 130 Volts. It is fitted with a scale visible from a distance and its construcction is explained in a very comprehensive manner, as all parts are arranged open.
The scale can be read from both sides.

Data

Inventory Number: 

ELE02

Date: 

1880-1900

Dimensions: 

Length : 38cm, Height : 37cm

Materials: 

Wood, copper, glass

Maker: 

Instrument Categories: 

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