Hypotheses.—Mr Mill's observations on the use of hypotheses in scientific investigation, except that they are characterized by his peculiar distinctness and accuracy of thought, do not differ from the views generally entertained by writers on the subject. We are induced to refer to the topic, to point out what seems to us a harsh measure dealt out to the undulatory theory of light—harsh when compared with the reception given to a theory of Laplace, having for its object to account for the origin of the planetary system.
We had occasion to quote a passage from Mr Mill, in which he remarks that the majority of scientific men seem not yet to have completely got over the difficulty of conceiving matter to act (contrary to the old maxim) where it is not; "for though," he says, "they have at last learned to conceive the sun attracting the earth without any intervening fluid, they cannot yet conceive the sun illuminating the earth without some such medium." But it is not only this difficulty (which doubtless, however, is felt) of conceiving the sun illuminating the earth without any medium by which to communicate its influence, which leads to the construction of the hypothesis, either of an undulating ether, or of emitted particles. The analogy of the other senses conducts us almost irresistibly to the imagination of some such medium. The nerves of sense are, apparently, in all cases that we can satisfactorily investigate, affected by contact, by impulse. The nerve of sight itself, we know, when touched or pressed upon, gives out the sensation of light. These reasons, in the first place, conduct us to the supposition of some medium, having immediate communication with the eye; which medium, though we are far from saying that its existence is established, is rendered probable by the explanation it affords of optical phenomena. At the same time it is evident that the hypothesis of an undulating ether, assumes a fluid or some medium, the existence of which cannot be directly ascertained. Thus stands the hypothesis of a luminiferous ether—in what must be allowed to be a very unsatisfactory condition. But a condition, we think, very superior to the astronomical speculation of Laplace, which Mr Mill, after scrutinizing the preceding hypothesis with the utmost strictness, is disposed to treat with singular indulgence.
"The speculation is," we may as well quote throughout Mr Mill's words, "that the atmosphere of the sun originally extended to the present limits of the solar system: from which, by the process of cooling, it has contracted to its present dimensions; and since, by the general principles of mechanics, the rotation of the sun and its accompanying atmosphere must increase as rapidly as its volume diminishes, the increased centrifugal force generated by the more rapid rotation, overbalancing the action of gravitation, would cause the sun to abandon successive rings of vaporous matter, which are supposed to have condensed by cooling, and to have become our planets.
"There is in this theory," Mr Mill proceeds, "no unknown substance introduced upon supposition, nor any unknown property or law ascribed to a known substance. The known laws of matter authorize us to suppose, that a body which is constantly giving out so large an amount of heat as the sun is, must be progressively cooling, and that by the process of cooling it must contract; if, therefore, we endeavour, from the present state of that luminary, to infer its state in a time long past, we must necessarily suppose that its atmosphere extended much further than at present, and we are entitled to suppose that it extended as far as we can trace those effects which it would naturally leave behind it on retiring; and such the planets are. These suppositions being made, it follows from known laws that successive zones of the solar atmosphere would be abandoned; that these would continue to revolve round the sun with the same velocity as when they formed part of his substance, and that they would cool down, long before the sun himself, to any given temperature, and consequently to that at which the greater part of the vaporous matter of which they consisted would become liquid or solid. The known law of gravitation would then cause them to agglomerate in masses, which would assume the shape our planets actually exhibit; would acquire, each round its own axis, a rotatory movement; and would in that state revolve, as the planets actually do, about the sun, in the same direction with the sun's rotation, but with less velocity, and each of them in the same periodic time which the sun's rotation occupied when his atmosphere extended to that point; and this also M. Comte has, by the necessary calculations, ascertained to be true, within certain small limits of error. There is thus in Laplace's theory nothing hypothetical; it is an example of legitimate reasoning from a present effect to its past cause, according to the known laws of that case; it assumes nothing more than that objects which really exist, obey the laws which are known to be obeyed by all terrestrial objects resembling them."—Vol. II. p. 27.
Now, it seems to us that there is quite as much of hypothesis in this speculation of Laplace as in the undulatory theory of light. This atmosphere of the sun extending to the utmost limits of our planetary system! What proof have we that it ever existed? what possible grounds have we for believing, what motive even for imagining such a thing, but the very same description of proof given and rejected for the existence of a luminiferous ether—namely, that it enables us to explain certain events supposed to result from it? Nor is the thing here imagined any the less a novelty, because it bears the old name of an atmosphere. An atmosphere containing in itself all the various materials which compose our earth, and whatever else may enter into the composition of the other planets, is as violent a supposition as an ether, not perceptible to the senses except by its influence on the nerves of sight. And this cooling down of the sun! What fact in our experience enables us to advance such a supposition? We might as well say that the sun was getting hotter every year, or harder or softer, or larger or smaller. Surely Mr Mill could not have been serious when he says, that "the known laws of matter authorize us to suppose, that a body which is constantly giving out so large an amount of heat as the sun is, must be progressively cooling"—knowing, as we do, as little how the sun occasions heat as how it produces light. Neither can it be contended that because no absolutely new substance, or new property of matter, is introduced, but a fantastic conception is framed out of known substances and known properties, that therefore there is less of rash conjecture in the supposition. In fine, it must be felt by every one who reads the account of this speculation of Laplace, that the only evidence which produces the least effect upon his mind, is the corroboration which it receives from the calculations of the mathematician—a species of proof which Mr Mill himself would not estimate very highly.
Many are the topics which are made to reflect a new light as Mr Mill passes along his lengthened course; we might quote as instances, his chapters on Analogy and the Calculation of Chances: and many are the grave and severe discussions that would await us were we to proceed to the close of his volumes, especially to that portion of his work where he applies the canons of science to investigations which relate to human nature and the characters of men. But enough for the present. We repeat, in concluding, the same sentiment that we expressed at the commencement, that such a work as this goes far to redeem the literature of our age from the charge of frivolity and superficiality. Those who have been trained in a different school of thinking, those who have adopted the metaphysics of the transcendental philosophy, will find much in these volumes to dissent from; but no man, be his pretensions or his tenets what they may, who has been accustomed to the study of philosophy, can fail to recognize and admire in this author that acute, patient, enlarged, and persevering thought, which gives to him who possesses it the claim and right to the title of philosopher. There are few men who—applying it to his own species of excellence—might more safely repeat the Io sono anche! of the celebrated Florentine.
MY COUNTRY NEIGHBOURS
People are fond of talking of the hereditary feuds of Italy—the factions of the Capulets and Montagues, the Orsini and Colonne—and, more especially, of the memorable Vendette of Corsica—as if hatred and revenge were solely endemic in the regions of
Mere prejudice! There is as good hating going on in England as elsewhere. Independent of the personal antipathies generated by politics, the envy, hatred, and malice arising out of every election contest, not a country neighbourhood but has its raging factions; and Browns and Smiths often cherish and maintain an antagonism every whit as bitter as that of the sanguinary progenitors of Romeo and Juliet.
I, for instance, who am but a country gentleman in a small way—an obscure bachelor, abiding from year's end to year's end on my insignificant farm—have witnessed things in my time, which, had they been said and done nearer the tropics, would have been cited far and near in evidence of the turbulence of human passions, and that "the heart is deceitful above all things, and desperately wicked." Seeing that they chanced in a homely parish in Cheshire, no one has been at the trouble to note their strangeness; though, to own the truth, none but the actors in the drama (besides myself, a solitary spectator) are cognizant of its incidents and catastrophe. I might boast, indeed, that I alone am thoroughly in the secret; for it is the spectator only who competently judges the effects of a scene; and merely changing the names, for reasons easily conceivable, I ask leave to relate in the simplest manner a few facts in evidence of my assertion, that England has its Capuletti e Montecchi as well as Verona.
In the first place, let me premise that I am neither of a condition of life, nor condition of mind, to mingle as a friend with those of whose affairs I am about to treat so familiarly, being far too crotchety a fellow not to prefer a saunter with my fishing-tackle on my back, or an evening tête-à-tête with my library of quaint old books, to all the good men's feasts ever eaten at the cost of a formal country visit. Nevertheless, I am not so cold of heart as to be utterly devoid of interest in the destinies of those whose turrets I see peering over the woods that encircle my corn-fields; and as the good old housekeeper, who for these thirty years past has presided over my household, happens to have grandchildren high in service in what are called the two great families in the neighbourhood, scarcely an event or incident passes within their walls that does not find an echo in mine. So much in attestation of my authority. But for such an introduction behind the scenes, much of the stage business of this curious drama would have escaped my notice, or remained incomprehensible.
I am wrong to say the two great "families;" I should have said the two great "houses." At the close of the last century, indeed, our parish of Lexley contained but one; one which had stood there since the days of the first James, nay, even earlier—a fine old manorial hall of grand dimensions and stately architecture, of the species of mixed Gothic so false in taste, but so ornamental in effect, which is considered as betraying the first symptoms of Italian innovation.
The gardens extending in the rear of the house were still more decidedly in the Italian taste, having clipped evergreens and avenues of pyramidal yews, which, combined with the intervening statues, imparted to them something of the air of a cemetery. There were fountains, too, which, in the memory of man, had been never known to play, the marble basins being, if possible, still greener than the grim visages of the fauns and dryads standing forlorn on their dilapidated pedestals amid the neglected alleys.
The first thing I can remember of Lexley Hall, was peeping as a child through the stately iron gratings of the garden, that skirted a by-road leading from my grandfather's farm. The desolateness of the place overawed my young heart. In summer time the parterres were overgrown into a wilderness. The plants threw up their straggling arms so high, that the sunshine could hardly find its way to the quaint old dial that stood there telling its tale of time, though no man regarded; and the cordial fragrance of the strawberry-beds, mingling with entangled masses of honeysuckle in their exuberance of midsummer blossom, seemed to mock me, as I loitered in the dusk near the old gateway, with the tantalizing illusions of a fairy-tale—the Barmecide's feast, or Prince Desire surveying his princess through the impermeable walls of her crystal palace.
But if the enjoyment of the melancholy old gardens of Lexley Hall were withheld from me, no one else seemed to find pleasure or profit therein. Sir Laurence Altham, the lord of the manor and manor-house, was seldom resident in the country. Though a man of mature years, (I speak of the close of the last century,) he was still a man of pleasure—the ruined hulk of the gallant vessel which, early in the reign of George III., had launched itself with unequalled brilliancy on the sparkling current of London life.
At that time, I have heard my grandfather say there was not a mortgage on the Lexley estate! The timber was notoriously the finest in the county. A whole navy was comprised in one of its coppices; and the arching avenues were imposing as the aisles of our Gothic minsters. Alas! it needed the lapse of only half a dozen years to lay bare to the eye of every casual traveller the ancient mansion, so long
and only guessed at till you approached the confines of the court-yard.
It was hazard that effected this. The dice-box swept those noble avenues from the face of the estate. Soon after Sir Laurence's coming of age, almost before the church-bells had ceased to announce the joyous event of the attainment of his majority, he was off to the Continent—Paris—Italy—I know not where, and was thenceforward only occasionally heard of in Cheshire as the ornament of the Sardinian or Austrian courts. But these tidings were usually accompanied by a shaking of the head from the old family steward. The timber was to be thinned anew—the tenants to be again amerced. Sir Laurence evidently looked upon the Lexley property as a mere hotbed for his vices. At last the old steward turned surly to our enquiries, and would answer no further questions concerning his master. My grandfather's small farm was the only plot of ground in the parish that did not belong to the estate; and from him the faithful old servant was as careful to conceal the family disgraces, as to maintain the honour of Sir Laurence's name in the ears of his grumbling tenants.
The truth, however, could not long be withheld. Chaisefuls of suspicious-looking men in black arrived at the hall; loungers, surveyors, auctioneers—I know not what. There was talk in the parish about foreclosing a mortgage, no one exactly understood why, or by whom. But it was soon clear that Wightman, the old steward, was no longer the great man at Lexley. These strangers bade him come here and go there exactly as they chose, and, unhappily, they saw fit to make his comings and goings so frequent and so humiliating, that before the close of the summer the old servitor betook himself to his rest in a spot where all men cease from troubling. The leaves that dreary autumn fell upon his grave.
According to my grandfather's account, however, few even of his village contemporaries grieved for old Wightman. They felt that Providence knew best; that the old man was happily spared the mortification of all that was likely to ensue. For before another year was out the ring fence, which had hitherto encircled the Lexley property, was divided within itself; a paltry distribution of about a hundred acres alone remaining attached to the old hall. The rest was gone! The rest was the property of the foreclosee of that hateful mortgage.