The Electrical Experimenter, Volume VI, No. 70 (Page 692), 1919.
Fig. 1–It is Well Known That the Moon, M, Always Turns the Same Face Toward the Earth, E, as the Black Arrows Indicate. The Parallel Rays from the Sun Illuminate the Moon in Its Successive Orbital Positions as the Unshaded Semi-circles Indicate. Bearing This in Mind, Do You Believe That the Moon Rotates on Its Own Axis?
Fig. 2–Tesla’s Conception of the Rotation of the Moon, M, Around the Earth, E; the Moon, In This Demonstration Hypothesis, Being Considered as Embedded In a Solid Mass, M1. If, As Commonly Believed, the Moon Rotates, This Would Be Equally True For a Portion of the Mass M2, and the Part Common to Both Bodies Would Turn Simultaneously in Opposite Directions.