The cause of the total destruction may exist in a loss of polarity! We know that all organic and inorganic bodies are subject to the laws of electricity—each has its polarity. Men who are engaged in mining can testify that the stratification of the earth is alternately negative and positive. The hemispheres of the earth are also governed by the same law; for, if you take a magnetic needle and toss it up in this hemisphere, which is negative, the positive end will come to the ground first; but if you pass the magnetic equator, which crosses the common equator in 23° 28', and then toss the needle up, its negative end will fall downwards. Hence we infer that the potato has a polarity, just as man has; and this is the reason of their definite character. Take a bean, and destroy its polarity by cutting it into several pieces, as you do the potato, and all the men on earth cannot make it germinate and grow to perfection. It will die just as a man will, if you destroy the polarity of his brain by wounding it.
Take an egg, and destroy its polarity by making a small puncture through it, and you can never get a chicken from it. A man or an animal will die of locked-jaw, caused by a splinter entering the living organism; and why? Because their electrical equilibrium, or their polarity is destroyed. Some of our readers may desire to know how we can prove that electricity plays a part in the germination and growth of animals and vegetables. In verification of it, we will give a few examples. A dish of salad may, by the aid of electricity, be raised in an hour. Hens' eggs can be hatched by a similar process in a few hours, which would require many days by animal heat. By the aid of electricity, water, which consists of oxygen and hydrogen, may be decomposed, and its elements set free. The poles of a galvanic battery may be applied to a dead body, and that body made to imitate the functions of life.
And lastly, it is through the medium of electrical attraction which bodies have for each other, that all the chemical compositions and decompositions depend. Bodies must be in opposite states of electricity in order to produce a result. Now, if the polarity of the potato is destroyed in the manner we have just alluded to, or should it be destroyed by coming in contact with the blade of a knife, the latter conducting off the electrical current, or by any other means, it must deteriorate. We are told that "the potato has several germinating points, and that a part will grow just as well as the whole." Such reasoning will not stand the test of common experience.
For example: the Almighty has endowed man with various faculties, and the perfection of his organism depends on these faculties, as a whole. Now, he may lose a leg, and yet be capable of performing the ordinary duties of life; but this does not prove that he might not perform them much better with both legs. So in reference to the potato. The fact of its ability to reproduce its kind from a small portion of the whole—a mere bud—should not satisfy us that a perfect germ is unnecessary. Then the question arises, How shall we restore the original identity of this valuable article of food?
We have, in the early part of this work, recommended the farmers to study the laws of vegetable physiology. This will furnish them with the right kind of information. We would, however, suggest to those who are desirous of making experiments, to comply with the conditions already alluded to, viz., plant a perfect germ, by which means the potato may be improved. Yet, in order to restore its identity, we must commence by germinating from the seed, and plant that on soil abounding in the constituents necessary for its development. Elevated land abounding in small stones, and hill sides facing the south, are the best situations. Potatoes should never be cultivated on the same spot for two successive years.
In relation to the insect theory, we would observe, that it throws no light on the cause of the potato rot; for, in its gradual decay, that vegetable undergoes various changes; the particles of which it is composed assume new forms, and enter into new combinations; its elementary substances are separated, giving birth to new compounds, some of which result in an insect. We all know that animal and vegetable bodies may remain in a state of putrefaction in water, and be dissolved in the dust; yet some of their original atoms appear in a new system. Hence the insect theory has no more to do with the cause of the potato rot than the fungus.