A volcano is an opening made in the earth’s crust by internal heat, which has forced melted or heated matter through the vent. An earthquake is the effect of the confined gases and vapors, produced by the heat upon the crust. When the volcano, therefore, gets vent, the earthquake always ceases. But the latter has generally been more destructive of life and property than the former. Where one city has been destroyed by lava, like Herculaneum, Pompeii, and Stabiæ, twenty have been shaken down by the rocking and heaving of earthquakes. The records of ancient as well as modern times abound with examples of these tremendous catastrophes. Preëminent on the list is the city of Antioch. Imagine the inhabitants of that great city, crowded with strangers on a festival occasion, suddenly arrested on a calm day, by the earth heaving and rocking beneath their feet; and in a few moments two hundred and fifty thousand of them are buried by falling houses, or the earth opening and swallowing them up. Such was the scene which that city presented in the year 526; and several times before and since that period has the like calamity fallen upon it; and twenty, forty, and sixty thousand of its inhabitants have been destroyed at each time. In the year 17 after Christ, no less than thirteen cities of Asia Minor were in like manner overwhelmed in a single night. Think of the terrible destruction that came upon Lisbon in 1755. The sun had just dissipated the fog in a warm, calm morning, when suddenly the subterranean thundering and heaving began; and in six minutes the city was a heap of ruins, and sixty thousand of the inhabitants were numbered among the dead. Hundreds had crowded upon a new quay surrounded by vessels. In a moment the earth opened beneath them, and the wharf, the vessels, and the crowd went down into its bosom; the gulf closed, the sea rolled over the spot, and no vestige of wharf, vessels, or man ever floated to the surface. How thrilling is the account left us by Kircher, who was near, of the destruction of Euphemia, in Calabria, a city of about five thousand inhabitants, in the year 1638! “After some time,” says he, “the violent paroxysm of the earthquake ceasing, I stood up, and, turning my eyes to look for Euphemia, saw only a frightful black cloud. We waited till it had passed away, when nothing but a dismal and putrid lake was to be seen where the city once stood.” In like manner did Port Royal, in the West Indies, sink beneath the waters, with nearly all its inhabitants, in less than one minute, in the year 1692.
Still more awful, though usually less destructive, is often the scene presented by a volcanic eruption. Imagine yourselves, for instance, upon one of the wide, elevated plains of Mexico, far from the fear of volcanoes. The earth begins to quake under your feet, and the most alarming subterranean noises admonish you of a mighty power within the earth that must soon have vent. You flee to the surrounding mountains in time to look back and see ten square miles of the plain swell up, like a bladder, to the height of five hundred feet, while numerous smaller cones rise from the surface still higher, and emit smoke; and in their midst, six mountains are thrown up to the height, some of them at least, of sixteen hundred feet, and pour forth melted lava, turning rivers out of their course, and spreading terrific desolation over a late fertile plain, and forever excluding its former inhabitants. Such was the eruption, by which Jorullo, in Mexico, was suddenly thrown up, in 1759.
Still more terrific have been some of the eruptions in Iceland. In 1783, earthquakes of tremendous power shook the whole island, and flames burst forth from the ocean. In June these ceased, and Skaptar Jokul opened its mouth; nor did it close till it had poured forth two streams of lava, one sixty miles long, twelve miles broad, and the other forty miles long, and seven broad, and both with an average thickness of one hundred feet. During that summer the inhabitants saw the sun no more, and all Europe was covered with a haze.
Around the Papandayang, one of the loftiest mountains in Java, no less than forty villages were reposing in peace. But in August, 1772, a remarkable luminous cloud enveloping its top aroused them from their security. But it was too late. For at once the mountain began to sink into the earth, and soon it had disappeared with the forty villages, and most of the inhabitants, over a space fifteen miles long and six broad.
Still more extraordinary—the most remarkable on record—was an eruption in Sumbawa, one of the Molucca Islands, in 1815. It began on the fifth day of April, and did not cease till July. The explosions were heard in one direction nine hundred and seventy miles, and in another seven hundred and twenty miles. So heavy was the fall of ashes at the distance of forty miles that houses were crushed and destroyed. The floating cinders in the ocean, hundreds of miles distant, were two feet thick, and vessels were forced through them with difficulty. The darkness in Java, three hundred miles distant, was deeper than the blackest night; and finally, out of the twelve thousand inhabitants of the island, only twenty-six survived the catastrophe.
Now, if we confine our views to such facts as these, we can hardly avoid the conclusion that earthquakes and volcanoes are terrific exhibitions of God’s displeasure towards a fallen and guilty world. But if it can be shown that the volcanic agency exerts a salutary influence in preserving the globe from ruin, nay, is essential to such preservation, we must regard its incidental destruction of property and life as no evidence of a vindictive infliction, nor of the want of benevolence in its operation. And the remarkable proofs which modern geology has presented of vast accumulations of heated and melted matter beneath the earth’s crust, do make such an agent as volcanoes essential to the preservation of the globe. In order to make out this position, I shall not contend that all the earth’s interior, beneath fifty or one hundred miles, is in a state of fusion. For even the most able and decided of those geologists who object to such an inference, admit that oceans of melted matter do exist beneath the surface. And if so, how liable would vast accumulations of heat be, if there were no safety-valves through the crust, to rend asunder even a whole continent? Volcanoes are those safety-valves, and more than two hundred of them are scattered over the earth’s surface, forming vent-holes into the heated interior. Most of them, indeed, have the valves loaded, and the effort of the confined gases and vapors to lift the load produces the terrific phenomena of earthquakes and volcanoes. But if no such passages into the interior existed, what could prevent the pent-up gases from accumulating till they had gained strength enough to rend a whole continent, and perhaps the whole globe, into fragments? Is it not, then, benevolence by which this agency prevents so dreadful a catastrophe, even by means that bring some incidental evils along with them?
Some able writers do, indeed, object to the idea that volcanoes are safety-valves to the globe, deriving their objections from certain facts respecting the position of volcanic craters in the Sandwich Islands, if I do not misrecollect. Without going into the details of that case, for want of time and space, it seems to me that the facts respecting the connection between earthquakes and volcanoes, admitted by all, will justify such a view of the latter as is expressed by the term “safety-valves.” For earthquakes are but the incipient effects of the volcanic force within the globe; and if these effects have been so terrible at the beginning, what must be the full exhibition of that force, if not able to find a passage for the struggling gases and lava through the strata above them? Who can say that it might not rend a continent asunder, and, if deep enough seated, even the whole globe?
The question will undoubtedly be asked by every reflecting mind, why infinite wisdom and benevolence could not have devised a plan for securing the good resulting from volcanoes and earthquakes without the attendant evils. The same question meets us at almost every step of our examination of the present system of the world. For we every where meet with evil, incidentally connected with agencies whose predominant effects are beneficial. I incline to the opinion, that the true answer to this question is, that the evil is permitted that thereby greater good may be secured to the universe. Still the subject of the origin of evil is one whose full solution can hardly be expected in the present world, because we cannot here master all its elements. When it can be solved, we can tell why so much desolation and suffering are permitted to accompany the earthquake and the volcano. But if we can show that benefits far outweighing the evil are the result of this terrific agency, we gather from it decided evidence of the divine benevolence;—the same evidence which we gain from any other operations of nature; for in them all there is only a preponderance of good, not unmixed good. The desolation of this fair world by volcanic agency, and especially the destruction of life, do, indeed, teach us that this present system of nature is adapted to a state of probation and death, instead of a state of rewards and immortal life. It is adapted to sinful and fallen beings, rather than to those who are perfect in holiness and in happiness. In short, it is earth, not heaven. It is not such a world as heaven must be, to secure unalloyed and eternal happiness. Nevertheless, benevolence decidedly predominates in the arrangements of the present system, even in the desolating agency under consideration. I do not deny that God may sometimes employ this agency, as he may every other in nature, for the punishment of the guilty. But before we infer that this is the general use and design of volcanoes and earthquakes, we should ponder well the questions put by our Savior to some that told him of the Galileans, whose blood Pilate had mingled with their sacrifices. Suppose ye, answered the Savior, that these Galileans were sinners above all the Galileans, because they suffered such things? I tell you nay. Or those eighteen, upon whom the tower of Siloam fell and slew them, think ye that they were sinners above all men that dwelt in Jerusalem? I tell you nay. Let us follow the example of Jesus Christ, and take a more enlarged view of these startling and distressing events. Let us inquire whether they are not the incidental effects of agencies essential to the permanence and happiness of the great system of the universe. This is certainly the case in regard to volcanoes. We have strong reason to believe that they are essential to the preservation of the globe; and of how much higher consequence is this than the comparatively small amount of property and life which they destroy! If we can only rise to these higher views, and not suffer our judgment to be warped by the immediate terrors of the earthquake and the volcano, we shall see the smile of infinite benevolence where most men see only the wrath of an offended Deity.
My seventh geological argument for the divine benevolence is derived from the manner in which coal, rock salt, marble, gypsum, and other valuable materials were prepared for the use of man, long before his existence.
If a created and intelligent being from some other sphere had alighted on this globe during that remote period when the vegetation now dug out of the coal formation covered the surface with its gigantic growth, he might have felt as if here was a waste of creative power. Vast forests of sigillaria, lepidodendra, coniferæ, cycadeæ, and tree ferns would have waved over his head, with their imposing though sombre foliage, while the lesser tribes of calamites and equisetaceæ would have filled the intervening spaces; but no vertebral animal would have been there to enjoy and enliven the almost universal solitude. Why, then, he must have inquired, is there such a profusion of vegetable forms, and such a colossal development of individual plants? To what use can such vast forests be applied? But let ages roll by, and that same being revisit our world at the present time. Let him traverse the little Island of Britain, and see there fifteen thousand steam engines moved by coal dug out of the earth, and produced by these same ancient forests. Let him see these engines performing the work of two millions of men, and moving machinery which accomplishes what would require the unaided labors of three or four hundred millions of men, and he could not doubt but such a result was one of the objects of that rank vegetation which covered the earth ere it was fit for the residence of such natures as now dwell upon it. Let him go to the coal fields of other countries, and especially those of the United States, stretching over one hundred and fifty thousand square miles, containing a quantity absolutely inexhaustible, and already imparting comfort to millions of the inhabitants, and giving life and energy to every variety of manufacture through the almost entire length of this country, and destined to pour out their wealth through all coming time, long after the forests shall all have been levelled,—and irresistible must be the conviction upon his mind, that here is a beautiful example of prospective benevolence on the part of the Deity. In those remote ages, while yet the earth was unfitted for the higher races of animals that now dwell upon it, it was eminently adapted to nourish that gigantic flora which would produce the future fuel of the human race, when that crown of all God’s works should be placed upon the earth. Ere that time, those forests must sink beneath the ocean, be buried beneath deposits of rock thousands of feet thick. But during all that period, all those chemical changes which are essential to convert them into coal would be accomplished, and, at last, man would find access, by his ingenuity and industry, to the deep-seated beds whence his fuel might be drawn. Nor would these vast repositories fail him till the consummation of all things. Surely there was no waste, but there was a far-reaching plan of benevolence in the profusion of vegetable life in the earlier periods of our planet.