Excerpt from The Induction Motor and Other Alternating Current Motors: Their Theory and Principles of Design
"...Ignorance more frequently begets confidence than does knowledge." Charles Darwin, "The Descent of Man," p. 3.
"It is particularly interesting to note how many theorems, even among those not ordinarily attacked without the help of the Differential Calculus, have here been found to yield easily to geometrical methods of the most elementary character.
"Simplification of modes of proof is not merely an indication of advance in our knowledge of a subject, but is also the surest guarantee of readiness for farther progress." Lord Kelvin and Peter Guthrie Tait, "Elements of Natural Philosophy," p. v.
"The simplicity with which complicated mechanical interactions may be thus traced out geometrically to their results appears truly remarkable." Sir George Howard Darwin, "On Tidal Friction, in Treatise on Natural Philosophy." By Kelvin and Tait, p. 509.
"...the absence of analytical difficulties allows attention to be more easily concentrated on the physical aspects of the question, and thus gives the student a more vivid idea and a more manageable grasp of the subject than he would be likely to attain if he merely regarded electrical phenomena through a cloud of analytical symbols." Sir Joseph John Thomson, "Elements of the Mathematical Theory of Electricity and Magnetism," p. vi.
"It is remarkable that such elementary cases of Newtons dynamics should require abstruse considerations for their explanation. But it is far worse in the more modem dynamics, with ignoration of coordinates, and modified Lagrangean functions. Dynamics as visible to the naked eye seems to disappear altogether sometimes, leaving nothing but complicated algebra." Oliver Heaviside, "Electromagnetic Theory," vol. iii, p. 401.
"Let them make the effort to express these ideas in appropriate words without the aid of symbols, and if they succeed they will not only lay us laymen under a lasting obligation, but, we venture to say, they will find themselves very much enlightened during the process, and will even be doubtful whether the ideas as expressed in symbols had ever quite found their way out of the equations into their minds." "The Scientific Papers" of James Clerk Maxwell, vol. ii, p. 328.
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