Sturgeon's electromagnet, which could be regulated by closing and opening the circuit, converted electrical energy into useful and controllable mechanical work.
(Sturgeon's electromagnet; could be regulated; by closing and opening the circuit) (Sturgeon's electromagnet; converted; electrical energy; into useful and controllable mechanical work)
Sturgeon's electromagnet Sturgeon's electromagnet
could be regulated converted
by closing and opening the circuit
electrical energy into useful and controllable mechanical work