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FourthDimension:
“In the 1890’s fourth power relationships were beginning to show up in the physics and in relation to electromagnetic phenomena, but you couldn’t make a model of it. . . . By using imaginary numbers, complex numbers, where the square root of minus one is going into yesterday one quadrant, they found they could accommodate the fourth power mathematically, though they couldn’t make a model of it.”
Cite OREGON Lecture '64 - p. 131, 6 Jul '62
