Electromagnetic Compass, Large Bronze Instrument Circa 1875, J. Salleron In Paris

Superb instrument, Tangent Compass, bronze, for determining value of magnetic fields.
This instrument, which is leveled on three screw feet, consists of a 22cm diameter vertical coil with wound copper wires, a large compass on a central 15.5cm diameter stand, a magnetic needle with stop balanced by two magnetic markers, and a silver and gold dial.
Four electrical wires can be screwed in underneath, on either side.
I have no idea how to use it or calculate its values… Good overall condition as found, quite dusty…
I don't see any missing parts, but I'm not an expert. (No problem refunding if you're not satisfied)
31cm x 22cm Weight: 3.750kg
Buy it now, payable by credit card or PayPal.
- eclectic – We are not experts, but we have been in this business for over 50 years.
Hassle-free refund if you're not satisfied.
Company registration number (SIRET): FR 24.430113233. Invoice and certificate are included with every shipment.