Object #16 is a(n)...
Correct
Answer: Magneto Electric Machine. Davis & Kidder’s patent Magneto Electric Machine (c. 1870-1890) produces alternating current electricity. The strength and frequency of the current is controlled by changing the cranking speed. The therapeutic value of the treatment, if any, was likely due to the placebo effect. Learn more ››
Incorrect
Answer: Magneto Electric Machine. Davis & Kidder’s patent Magneto Electric Machine (c. 1870-1890) produces alternating current electricity. The strength and frequency of the current is controlled by changing the cranking speed. The therapeutic value of the treatment, if any, was likely due to the placebo effect. Learn more ››
