Says Professor J. C. Zachos (_Studies in Science_): “... Such is the present system of telegraphing which if it were multiplied so as to include every town and hamlet in the country, yea, even be within the reach of every individual as an operator, would convey but a feeble illustration of the complication, the number, the power, and the perfect unity of a similar system in the human body. “We have first in each individual cell a galvanic battery. There are countless millions of such cells in the human body, whose united force has never been estimated, but doubtless a million of tons would not approximate to the force they are exerting at any one instant of time. Each of these cells is provided with two nerves; an afferent and an efferent nerve, a carrier to, and a carrier from, that center; each, endowed with different functions by reason of the duality of force generated in each cell: a force of motion and a force of sensation. A number of such cells and nerves may be combined and at a certain point of the circuit they make there, a concentration and accumulation of power by a plexus and convolution of these nerves, around a central substance called ‘neureline’——a granulated collection of particles that seem to take the place of the soft iron in the helix, for they are always found in the midst of these convoluted masses of nerves; these masses are called _ganglia_; they are the centers of nervous power and intelligence, connected each with some special group of functions; associated by connecting nerves with each other, and having their central and common connection in the largest ganglion, called the brain. “No part of the system fails to be visited by these nerves, and although they are not discoverable in every tissue, yet their presence is inferred, because their function is there——sensation or motion, or both.[8] [Footnote 8: Is it possible to overestimate the importance of perfect nutrition by which only this wonderful system can be preserved in health? (See “Saline Starvation.”)] “We can not at present enter into details in enumerating the number, the structure, the special functions of these several ganglia, which might well be called the telegraphic stations of the body; they vary from the size of a grain of sand, to that of the brain which fills the cavity of the skull.