The Story of the Herschels Part 3

[Footnote 1: Herschel married a Miss Stewart in February 1826.]

"For the last two or three days we have been looking at houses, and have all but agreed for one--a most beautiful place within four or five miles out of town, called 'The Grove.' In point of situation it is a perfect paradise, in rich and magnificent mountain-scenery, and sheltered from all winds, even the fierce south-easter, by thick surrounding woods. I must reserve for my next all description of the gorgeous display of flowers which adorns this splendid country, as well as of the astonishing brilliancy of the constellations, which the calm, clear nights show off to great advantage."

Mr. Herschel settled at Feldhausen, about 142 feet above the sea, and in long. 22 46' 9".11 E., and lat. 33 58' 26".59 S. Here he entered upon his great series of observations of the southern heavens, which he continued with unwearied ardour for a period of four years. The results were afterwards published, at the cost of the Duke of Northumberland, in a work ent.i.tled "Results of Astronomical Observations made in 1834-35-36-37-38, at the Cape of Good Hope." In this superb work, which placed its author on an equality with the most brilliant and ill.u.s.trious astronomers, he defined and described 4015 of the nebulae and star-groups in the southern hemisphere, and 2995 of the double stars; besides entering into a variety of valuable particulars relative to Halley's comet, the solar spots, the satellites of Saturn, and the measurement of the apparent magnitude of stars.

On his return to England (in 1838) the astronomer received a n.o.ble welcome. Honours poured in upon him. The Gold Medal of the Astronomical Society was conferred upon him for a second time. William IV. had previously distinguished him with the Hanoverian order of K.H.; but, on the coronation of Queen Victoria, he received a baronetcy; and in 1839 the University of Oxford made him a D.C.L.

Continuing his career of scientific industry, he issued, in 1849, his important and very valuable treatise ent.i.tled "Outlines of Astronomy."

In 1845, he was appointed President of the British a.s.sociation; and in 1848, of the Royal Astronomical Society. To his other honours was added that of Chevalier of the Prussian order, "Pour la Merite," founded by Frederick the Great, and bestowed at all times with a discrimination which renders it a deeply-coveted distinction. Of the academies and leading scientific inst.i.tutions of the Continent and the United States, he was also an honorary or corresponding member.

Besides his works on meteorology and physical geography, he published, in 1867, an admirable little volume--"Familiar Lectures on Scientific Subjects." In this he showed that he could write with as much ease and intelligibility for the general public as for the higher order of scientific inquirers. His style in this valuable manual of information has a charm of its own, and entices the reader into the consideration of subjects apparently abstruse. He is earned on from page to page without any great mental effort, and finds himself rapidly mastering difficulties which he had been accustomed to regard as insuperable.

Let us take the first lecture on "Volcanoes and Earthquakes," and obtain a glimpse of Herschel's mode of treatment. He refers to the greater and more permanent agencies which affect the configuration of our planet.

Everywhere, he says, and along every coast-line, we see the sea warring against the land, and overcoming it; wearing it and eating it down, and battering it to pieces; grinding those pieces to powder; carrying that powder away, and spreading it out over its own bottom, by the continued effect of the tides and currents. What a scene of continual activity is presented by the chalk-cliffs of Old England! How they are worn, and broken up, and fantastically sculptured by the influence of winds and waters! Precipices cut down to the sea-beach, constantly hammered by the waves, and constantly crumbling; the beach itself made of the flints outstanding after the softer chalk has been ground down and washed away; themselves grinding one another under the same ceaseless discipline--first rounded into pebbles, then worn into sand, and then carried further and further down the slope, to be replaced by fresh ones from the same source. Here the likeness of an old Gothic cathedral, with lofty arch, and shapely pinnacle; there the similitude of a ma.s.s of medieval fortifications, with crumbling battlements and shattered towers!

The same thing, the same waste and wear, is going on everywhere, round every coast. The rivers contribute their share to the great work of change. Look at the sand-banks at the mouth of the Thames. What are they, says Sir John Herschel, but the materials of our island carried out to sea by the stream? The Ganges carries away from the soil of India, and delivers into the sea, twice as much solid substance weekly as is contained in the Great Pyramid of Egypt. The Irawaddy sweeps off from Burmah sixty-two cubic feet of earth in every second of time, on an average Sometimes vast amount of earthy materials is transferred from one locality to another by river agency, as is the case in the deltas of the Nile and the Mississippi.

These changes operate silently, continuously, and unperceived by the ordinary observer; but Nature does not limit herself always and everywhere to such peaceful agencies. At times, and in certain places, she acts with startling abruptness and extraordinary violence. Let the volcano and the earthquake attest the immensity of her power. Let the earthquake tell how, within the memory of man, the whole coast-line of Chili, for 100 miles about Valparaiso, with the mighty chain of the Andes, was hoisted at one blow, and in a single night (November 19, 1822), from two to seven feet above its former level, leaving the beach below the old low-water mark high and dry. One of the Andean peaks upheaved on this occasion was the colossal ma.s.s of Aconcagua, which overlooks Valparaiso, and measures nearly 24,000 feet in height. On the same occasion, at least 10,000 square miles of country were estimated as having been upheaved; and the upheaval was not confined to the land, but extended far away to sea,--which was proved by the soundings off Valparaiso and along the coast having been found considerably shallower than they were before the shock.

In the year 1819, in an earthquake in India, in the district of Cutch, bordering on the Indus, a tract of country more than fifty miles long and sixteen miles broad was suddenly raised _ten feet_ above its former level. The raised portion still stands up above the unraised, like a long perpendicular rampart, known by the name of Ullah Bund, or G.o.d's Wall.

With a similar fertility of ill.u.s.tration, Herschel sets before us the phenomena of volcanic eruptions and their extraordinary effects.

In a district of Mexico, between the two streams of the Cintimba and the San Pedro, on the 28th of September 1789, a whole tract of ground, from three to four miles in extent, surged up like a foam-bubble, or the swell of a wave, to a height of upwards of 500 feet. Flames, lurid and crackling, broke forth over a surface of more than half a square league; and the earth, as if softened by heat, was seen to rise and sink like the rolling tide. Vast chasms opened in the earth, into which the two rivers poured their waters headlong; reappearing afterwards at no great distance from a cl.u.s.ter of _hornitos_, or small volcanic cones, which sprang out of the mighty mud-torrent that gradually covered the entire plain. Wonderful and awful as were these phenomena, they were surpa.s.sed by the sudden opening of a chasm which vomited forth fire, and red-hot stones and ashes, until they acc.u.mulated in a range of six large mountain ma.s.ses,--one of which, now known as the volcano of Jorullo, attains an alt.i.tude of 1690 feet above the ancient level.

In like manner Sir John proceeds to describe an eruption of Mount Tomboro, in the island of Sumbawa, the influence of which was felt to a distance of 1000 miles from its centre, in strange tremulous motions of the earth, and in the clash and clang of loud explosions. He says that he had seen it computed that the quant.i.ty of ashes and lava ejected in the course of this tremendous eruption would have formed three mountains of the size of Mont Blanc.

As to the nature of the forces which operate to produce this astounding result, Herschel puts forward a theory of singular simplicity and directness.

"The origin," he says, "of such an enormous power thus occasionally exerting itself, will no doubt seem very marvellous--little short, indeed, of miraculous intervention; but the mystery, after all, is not quite so great as at first it seems. We are permitted to look a little way into these great secrets of Nature; not far enough, indeed, to clear up every difficulty, but quite enough to penetrate us with admiration of that wonderful system of counterbalances and compensations, that adjustment of causes and consequences, by which, throughout all nature, evils are made to work their own cure, life to spring out of death, and renovation to tread in the steps and efface the vestiges of decay." And he finds the clew to the secret, the key of the whole matter, in the earth's vast central heat. This it is which produces the convulsions that change the terrestrial configuration, and fill the minds of men with fear and awe. Conceive of "a sea of fire, on which we are all floating, land and sea,"--a boiling, seething, incandescent reservoir in the centre of our planet; and the solution of the problem will seem to you not difficult. Such a sea would necessarily roll its liquid matter to and fro; and the removal of ever so small a portion from one point to another on the earth's surface would tend to disturb the equilibrium of the floating ma.s.s; just as, when a ship is launched into the river, the water it displaces is carried to the opposite bank with greater or less violence, according to the amount of displacement.

It is impossible, adds Herschel, but that this increase of pressure in some places and relief in others must be very unequal in their bearings.

So that at some point or another our planet's floating crust must be brought into a state of strain, and if there be a weak or a soft part a crack will at last take place. This is exactly what happened in the earthquake which originated the Allah Bund, or G.o.d's Wall, in Cutch.

Volcanic eruptions are easily explicable on this principle,--the volcano being simply a vent for the pa.s.sage of heated and molten matter, which the elevating pressure of the liquid below tends to eject. It is a well-known fact that volcanoes and earthquake-centres are nearly all situated on the borders or in the immediate neighbourhood of seas and oceans; and the reason would seem to be, that at such positions the acc.u.mulation of transported matter would necessarily attain its maximum, to whatever cause it might be due. Then again, as Herschel points out, the eruption of scorite and lava from the mouths of volcanoes, the result of the upward movement of the fiery liquid below, compensates in some degree for the downward transfer of material by detritus and alluvial deposits. Hence it may be inferred that, on the whole, the quant.i.ty of solid matter above the ocean-level probably remains nearly always at the same amount.

It is with this ease and lucidity that Sir John deals with scientific subjects of the greatest importance,--his genius resembling the elephant's trunk, which can balance a straw or rend an oak. In private life he displayed a simplicity of manner in harmony with the general una.s.sumingness of his character. In his books as in society, in society as in his books, he was the same,--that is, free from all ostentation, free from self-pride, free from the arrogance of superior knowledge, and as ready to unbend himself to a child as to discourse with men of science.

His career was a tranquil and a prosperous one, and, apart from the record of his discoveries and his honours, presents nothing of interest.

He was peculiarly happy in his domestic relations; and in the wide circle of friends attracted by the mingled charm of his intellect and manners. A devout Christian, a man of generosity and culture, a philosopher of great breadth of view and infinite patience of research,--we can place few better or brighter examples before our English youth than Sir John Herschel.

CHAPTER V.

We could not conclude our notice of this remarkable family without some further allusion to its not least remarkable member--Caroline Lucretia Herschel.

To her varied accomplishments, her astronomical researches, and, above all, to her unwearied and unselfish devotion to her brother William, we have already made frequent allusion. She seemed to live for him and in him, to live for his fame and prosperity; and she poured out at his feet the treasures of an inexhaustible affection. To a.s.sist him in his labours, at whatever sacrifice, was her sole object in life; and she was certainly more careful for his reputation than was he himself. During his declining years she was his princ.i.p.al stay and support, and she was in daily attendance to note down or to calculate the results of his observations. His death was a severe blow to her; but, with characteristic courage, she retired to Hanover, gave herself up to scientific pursuits, and in comparative solitude spent her later years.

Her biographer writes:--

"When all was over, her only desire seems to have been to hurry away. Hardly was her brother laid in his grave than she collected the few things she cared to keep, and left for ever the country where she had spent fifty years of her life, living and toiling for him and him only. 'If I should leave off making memorandums of such events as affect or are interesting to me, I should feel like what I am,--namely, a person that has nothing more to do in this world.' Mournful words! doubly mournful, when we know that the writer had nearly half an ordinary lifetime still between her and that grave which she made haste to prepare, in the hope that her course was nearly run. Who can think of her, at the age of seventy-two, heart-broken and desolate, going back to the home of her youth in the fond expectation of finding consolation, without a pang of sympathetic pity? She found everything changed."

_That_, indeed, is to all of us the greatest grief, when we return to the home of our youth. It is as if, during the years of our absence, we had expected everything to stand as still as in the palace of the Sleeping Beauty while the charm rested upon it. We are fain to see the trees in their young greenness as when they sheltered our childhood, to find the hedgerows blooming with the same violets, to hear the mill-stream murmuring with the same music. Time furrows our brows with wrinkles, and streaks our hair with silver; our hearts grow colder; our minds lose their elasticity and freshness; our friends pa.s.s away from our side. But still we think to ourselves that in the old scenes all things are as they were. We say to ourselves: The bird sings as of old in the elm-trees at the garden-foot; the rose-bush blossoms as of old against our favourite window.

"The varying year with blade and sheaf Clothes and re-clothes the happy plains; Here rests the sap within the leaf, Here stays the blood along the veins.

Faint shadows, vapours lightly curled, Faint murmurs from the meadows come, Like hints and echoes of the world To spirits folded in the womb."

But we regain the old familiar places, and, alas! we find that change has been as busy with them as with us. The signs of decay are upon the trees; the brook has ceased to flow; the rose-bush has withered to the ground. There are trees as green and streams as musical and flowers as sweet as in our youth; but they are not the streams or flowers or trees which delighted us, and to us they can never be as dear. But a worse alteration has taken place than any visible in the face of nature. We discover that we have lost the old habits, the old capacity of enjoyment; and we soon discover that it was the sympathies, the hopes, the aspirations of youth which, after all, lent to these early scenes their rare and irrecoverable attraction.

And thus it was that Miss Herschel found everything changed. A life of fifty years spent in a certain routine and upon certain objects, had unfitted her to tread in the old paths. It soon became clear to her that all her ideas and feelings had been shaped and influenced in a totally different path. More bitter still, we are told, she came to know that in her great sorrow and inextinguishable love she was all alone. And bitterest of all was the feeling that, in losing her brother she had lost the glory of her life, the source of her intellectual enjoyment.

"You don't know," she wrote to a friend, "the blank of life after having lived within the radiance of genius." Yet to live in this blankness, and to do the best she could with it, became the work of Caroline Lucretia Herschel at the age of threescore years and ten,--an age when most of us have already put off our cares and anxieties, but when she began to enter on a new life, with new habits, new duties, and new a.s.sociations.

Her interest in astronomical pursuits never slackened, and she watched with eagerness the labours and successes of her nephew. The respect paid to her in society as a "woman of science" was not unwelcome, though she affected to make light of it. "You must give me leave," she wrote to Sir John, "to send you any publications you can think of, without mentioning anything about paying for them. For it is necessary I should every now and then lay out a little of my spare cash in that, for the sake of supporting the reputation of being a learned lady; (there is for you!) for I am not only looked at for such a one, but even stared at here in Hanover!" It was with unaffected modesty she deprecated the honorary membership of the Irish Academy, conferred on one who, she said, had not for many years discovered even a comet; yet she was by no means insensible to the distinction. Every man of scientific eminence who visited Hanover visited this aged lady; and her presence in the theatre, even in her latest years, was a constant source of attraction. Such was the simple frugality of her habits, that she experienced an actual difficulty in disposing of her income. She affirmed that the largest sum she could spend upon herself was 50 a year; and the annual pension of 100, left by her brother, she refused, or else devoted the quarterly or half-yearly payment to the purchase of some handsome present for her nephew or niece.

Such was Caroline Lucretia Herschel; and as such she was a remarkable proof that the rarest womanly gifts of affectionate forethought and loving devotion may exist in combination with intellectual strength and scientific enthusiasm.

Of the force, keenness, and permanency of her sisterly love, an ill.u.s.tration of a pathetic character occurs in a letter which she addressed to her nephew, February 27, 1823:--

"I am grown much thinner than I was six months ago: when I look at my hands, they put me so in mind of what your dear father's were, when I saw them tremble under my eyes, as we latterly played at backgammon together."

It has long been the reproach of England that she treats, or rather that her Government treats, her men of science, her artists, and her litterateurs with a disgraceful parsimony. It would appear from the following letter that Sir William Herschel was inadequately rewarded, and that his sister felt this keenly:--

"There can be no harm," she says, "in telling my own dear nephew that I never felt satisfied with the support your father received towards his undertakings, and far less with the ungracious manner in which it was granted. For the last sum came with a message that more must never be asked for. (Oh! how degraded I felt, even for myself, whenever I thought of it!) And after all it came too late, and was not sufficient; for if expenses had been out of question, there would not have been so much time, and labour, and expense, for twenty-four men were at times by turns, day and night, at work, wasted on the first mirror, which had come out too light in the casting (Alex more than once would have destroyed it secretly, if I had not persuaded him against it); and without two mirrors, you know, such an instrument cannot be always ready for observing.

"But what grieved me most was that to the last your poor father was struggling above his strength against difficulties which he well knew might have been removed if it had not been attended with too much expense. The last time the mirror was obliged to be taken from the polisher on account of some obstacle, I heard him say (in his usual manner of thinking aloud on such occasions), 'It is impossible to make the machine act as required without a room three times as large as this.'

"I must say a few words of apology for the good King (George III.), and ascribe the close bargains which were made between him and my brother to the _shabby, mean-spirited advisers_ who were undoubtedly consulted on such occasions; but they are dead and gone, and no more of them."

In February 1828, the great services which this high-souled woman had rendered to astronomical science were fitly rewarded by the presentation to her of the Royal Astronomical Society's gold medal,--the greatest honour which an astronomer can receive.

Mr. South, himself an astronomer of deserved repute, was charged with the duty of presenting the medal; and in the course of his address he dwelt on the labours of her brother, and the share she had had in them.

Sir William's first catalogue of new nebulae and cl.u.s.ters of stars, he said, amounting in number to one thousand, was compiled with observations made from a twenty-foot reflector in the years 1783, 1784, and 1785. By the same instrument he was enabled to discover the positions of a second thousand of these distant worlds in 1785 to 1788; while the places of five hundred others were registered on the celestial map between 1788 and 1802. What, we may ask, were the discoveries of Columbus compared with these? He revealed to Europe the existence of only a single continent; Herschel unfolded to man the mysteries of the depths of the heavens.

But, continued Mr. South, when we have thus enumerated the results obtained in the course of "sweeps" with this instrument, and taken into consideration the extent and variety of the other observations which were at the same time in progress, a most important part yet remains untold. Who partic.i.p.ated in his toils? Who braved with him all the experiences of inclement weather? Who shared, and consoled him in, his privations? A woman. And who was she? His sister. Miss Herschel it was who by night acted as his amanuensis; she it was whose pen conveyed to paper his observations as they issued from his lips; she it was who noted the various aspects and phenomena of the objects observed; she it was who, after spending the still night beside the wonder-exhibiting instrument, carried the rough, blurred ma.n.u.scripts to her cottage at daybreak, and by the morning produced a clean copy and register of the night's achievements; she it was who planned the labour of each succeeding night; she it was who reduced into exact form every calculation; she it was who arranged the whole in systematic order; and she it was who largely a.s.sisted her ill.u.s.trious brother to obtain his imperishable renown.

Miss Herschel's claims to the grat.i.tude of men of science, and to the admiration of all who can appreciate the beauty of self-sacrifice, did not end here. She was herself an astronomer, and an original observer.