Triumphs of Invention and Discovery in Art and Science Part 13

It is a twofold memorial: a bronze statue at Stoke-upon-Trent, and a memorial inst.i.tute, erected close to the birth-place of the Great Potter at Burslem. The foundation-stone was laid on the 26th of October by the Right Hon. W. E. Gladstone, M.P., then Chancellor of the Exchequer, in the presence of a very large and enthusiastic a.s.semblage. The Chancellor delivered a public address, which in eloquent terms did homage to Wedgwood's great mental qualities and his services to his country.

He described as his most signal and characteristic merit, the firmness and fulness of his perception of the true law of what we term industrial art, or, in other words, of the application of the higher art to industry--the law which teaches us to aim first at giving to every object the greatest possible degree of fitness and convenience for its purpose, and next at making it the article of the highest degree of beauty, which compatibly with that fitness and convenience it will bear--which does not subst.i.tute the secondary for the primary end, but recognizes as part of the business the study to harmonize the two.

Mr. Gladstone observed, that to have a strong grasp of this principle, and to work it out to its results in the details of a vast and varied manufacture, was a praise high enough for any man, at any time and in any place. But he thought it was higher and more peculiar in the case of Wedgwood than it could be in almost any other case. For that truth of art which he saw so clearly, and which lies at the root of excellence, is one of which England, his country, has not usually had a perception at all corresponding in strength and fulness with her other rare endowments. She has long taken a lead among the European nations for the cheapness of her manufactures, not so for their beauty. And if the day should arrive when she shall be as eminent for purity of taste as she is now for economy of production, the result will probably be due to no other single man in so remarkable a degree as to Josiah Wedgwood.

We conclude with a lively extract from the Chancellor's exhaustive and interesting address:--

"Wedgwood," he says, "in his pursuit of beauty, did not overlook exchangeable value or practical usefulness. The first he could not overlook, for he had to live by his trade; and it was by the profit derived from the extended sale of his humbler productions that he was enabled to bear the risks and charges of his higher works. Commerce did for him what the King of France did for Sevres, and the Duke of c.u.mberland for Chelsea, it found him in funds. And I would venture to say that the lower works of Wedgwood are every whit as much distinguished by the fineness and accuracy of their adaptation to their uses as his higher ones by their successful exhibition of the finest arts. Take, for instance, his common plates, of the value of, I know not how few, but certainly of a very few pence each. They fit one another as closely as cards in a pack. At least, I for one have never seen plates that fit like the plates of Wedgwood, and become one solid ma.s.s. Such accuracy of form must, I apprehend, render them much more safe in carriage....

"Again, take such a jug as he would manufacture for the wash-stand table of a garret. I have seen these made apparently of the commonest material used in the trade. But instead of being built up, like the usual and much more fas.h.i.+onable jugs of modern manufacture, in such a shape that a crane could not easily get his neck to bend into them, and the water can hardly be poured out without risk of spraining the wrist, they are constructed in a simple capacious form, of flowing curves, broad at the top, and so well poised that a slight and easy movement of the hand discharges the water. A round cheese-holder or dish, again, generally presents in its upper part a flat s.p.a.ce surrounded by a curved rim; but the cheese-holder of Wedgwood will make itself known by this--that the flat is so dead a flat, and the curve so marked and bold a curve; thus at once furnis.h.i.+ng the eye with a line agreeable and well-defined, and affording the utmost available s.p.a.ce for the cheese. I feel persuaded that a Wilts.h.i.+re cheese, if it could speak, would declare itself more comfortable in a dish of Wedgwood's than in any other dish."

The worthiest successor to Wedgwood whom England has known was the late Herbert Minton, who was scarcely less distinguished than his predecessor for perseverance, patient effort, and artistic sentiment. We owe to him in a great measure the revival of the elegant art of manufacturing encaustic tiles.

The princ.i.p.al varieties of ceramic ware now in use are:--1. Porcelain, which is composed, in England, of sand, calcined bones, china-clay, and potash; and, at Dresden, of kaolin, felspar, and broken biscuit-porcelain; 2. Parian, which is used in a liquid state, and poured into plaster-of-paris moulds; 3. Earthenware, the _Fayence_ of the Italians, and the _Delft_ of the Dutch, made of various kinds of clay, with a mixture of powdered calcined flint; and, 4. Stoneware, composed of several kinds of plastic clay, mixed with felspar and sand, and occasionally a little lime.

It is estimated that our English potteries not only supply the demand of the United Kingdom, but export ware to the value of nearly a million and a half annually. The establishments are about 190 in number; employ 75,000 to 80,000 operatives; and export 90,000,000 pieces.

The Miner's Safety Lamp.

SIR HUMPHREY DAVY.

The Miner's Safety Lamp.

SIR HUMPHREY DAVY.

"What's that? Is the house coming down?" cried Mr. Borlase, the surgeon-apothecary of Penzance, jumping out of his cozy arm-chair, as a tremendous explosion shook the house from top to bottom, making a great jingle among the gallipots in the shop below, and rousing him from a comfortable nap.

"Please, sir," said Betty, the housemaid, putting her head into the room, "here's that boy Davy been a-blowing of hisself up agen. Drat him, he's always up to some trick or other! He'll be the death of all of us some day, that boy will, as sure as my name's Betty."

"Bring him here directly," replied her master, knitting his brow, and s.c.r.e.w.i.n.g his mild countenance into an elaborate imitation of that of a judge he once saw at the a.s.sizes, with the black cap on, sentencing some poor wretch to be hanged. "Really, this sort of thing won't do at all."

Only, it must be owned, Mr. Borlase had said that many times before, and put on the terrible judicial look too, and yet "that boy Davy" was at his tricks again as much as ever.

"I'll bring as much as I can find of him, sir," said Betty, gathering up her ap.r.o.n, as if she fully expected to discover the object of her search in a fragmentary condition.

Presently there was heard a shuffling in the pa.s.sage, and a somewhat ungainly youth, about sixteen years of age, was thrust into the room, with the due complement of legs, arms, and other members, and only somewhat the grimier about the face for the explosion. His fingers were all yellow with acids, and his clothes plentifully variegated with stains from the same compounds. At first sight he looked rather a dull, loutish boy, but his sharp, clear eyes somewhat redeemed his expression on a second glance.

"Here he is, sir," cried Betty triumphantly, as though she really had found him in pieces, and took credit for having put him cleverly together again.

"Well, Humphrey," said Mr. Borlase, "what have you been up to now?

You'll never rest, I'm afraid, till you have the house on fire."

"Oh! if you please, sir, I was only experimenting in the garret, and there's no harm done."

"No harm done!" echoed Betty; "and if there isn't it's no fault of yours, you nasty monkey. I declare that blow up gave me such a turn you could ha' knocked me down with a feather, and there's a smell all over the house enough to pison any one."

"That'll do, Betty," said her master, finding the grim judicial countenance rather difficult to keep up, and anxious to p.r.o.nounce sentence before it quite wore off. "I'll tell you what it is, young Davy, this sort of thing won't do at all. I must speak to Mr. Tonkine about you; and if I catch you at it again, you'll have to take yourself and your experiments somewhere else. So I warn you. You had much better attend to your work. It was only the other day you gave old Goody Jones a paperful of cayenne instead of cinnamon; and there's Joe Grimsly, the beadle, been here half a dozen times this day for those pills I told you to make up, and they're not ready yet. So just you take yourself off, mind your business, and don't let me have any more nonsense, or it'll be the worse for you."

And so the culprit gladly backed out of the room, not a whit abashed by the reprimand, for it was no novelty, to begin his experiments again and again, and one day, by way of compensation for keeping his master's household in constant terror of being blown up, to make his name familiar as a household word, by the invention of a little instrument that would save thousands and thousands from the fearful consequences of coal-pit explosions.

The Mr. Tonkine that his master referred to was the self-const.i.tuted protector of the Davy family. Old Davy had been a carver in the town, and dying, left his widow in very distressed circ.u.mstances, when this generous friend came forward and took upon himself the charge of the widow and her children. Young Humphrey, on leaving school, had been placed with Mr. Borlase to be brought up as an apothecary; but he was much fonder of rambling about the country, or experimenting in the garret which he had const.i.tuted his laboratory, than compounding drugs behind his master's counter. As a boy he was not particularly smart, although he was distinguished for the facility with which he gleaned the substance of any book that happened to take his fancy, and for an early predilection for poetry. As he grew up, the ardent, inquisitive turn of his mind displayed itself more strongly. He was very fond of spending what leisure time he had in strolling along the rocky coast searching for sea-drift and minerals, or reading some favourite book.

"There along the beach he wandered, nouris.h.i.+ng a youth sublime, With the fairy-tales of science, and the long result of time."

In after life he used often to tell how when tired he would sit down on the crags and exercise his fancy in antic.i.p.ations of future renown, for already the ambition of distinguis.h.i.+ng himself in his favourite science had seized him. "I have neither riches, nor power, nor birth," he wrote in his memorandum-book, "to recommend me; yet if I live, I trust I shall not be of less service to mankind and my friends than if I had been born with all these advantages." He read a great deal, and though without much method, managed, in a wonderfully short time, to master the rudiments of natural philosophy and chemistry, to say nothing of considerable acquaintance with botany, anatomy, and geometry; so that though the pestle and mortar might have a quieter time of it than suited his master's notions, Humphrey was busy enough in other ways.

[Ill.u.s.tration: HUMPHREY'S EXPERIMENTS ON THE DIFFUSION OF HEAT. Page 267.]

In his walk along the beach, the nature of the air contained in the bladders of sea-weed was a constant subject of speculation with him; and he used to sigh over the limited laboratory at his command, which prevented him from thoroughly investigating the matter. But one day, as good luck would have it, the waves threw up a case of surgical instruments from some wrecked vessel, somewhat rusty and sand clogged, but in Davy's ingenious hands capable of being turned to good account.

Out of an old syringe, which was contained in the case, he managed to construct a very tolerable air pump; and with an old shade lamp, and a couple of small metal tubes, he set himself to work to discover the causes of the diffusion of heat. At first sight the want of proper instruments for carrying on his researches might appear rather a hindrance to his progress in the paths of scientific discovery; but, in truth, his subsequent success as an experimentalist has been very properly attributed, in no small degree, to that necessity which is the parent of invention, and which forced him to exercise his skill and ingenuity in making the most of the scanty materials at his command.

"Had he," says one of his biographers, "in the commencement of his career been furnished with all those appliances which he enjoyed at a later period, it is more than probable that he might never have acquired that wonderful tact of manipulation, that ability of suggesting expedients, and of contriving apparatus, so as to meet and surmount the difficulties which must constantly arise during the progress of the philosopher through the unbeaten track and unexplored regions of science!"

While Davy was thus busily engaged qualifying himself for the distinguished career that awaited him, Gregory Watt, the son of the celebrated James Watt, being in delicate health, came to Penzance for change of air, and lodged with Mrs. Davy. At first he and Humphrey did not get on very well together, for the latter had just been reading some metaphysical works, and was very fond of indulging in crude and flippant speculations on such subjects, which rather displeased the shy invalid.

But one day some chance remark of Davy's gave token of his extensive knowledge of natural history and chemistry, and thenceforth a close intimacy sprang up between them, greatly to the lad's advantage, for Watt's scientific knowledge set him in a more systematic groove of study, and encouraged him to concentrate his energies on his favourite pursuit.

Another useful friend Davy also found in Mr. Gilbert, afterwards President of the Royal Society. Pa.s.sing along one day, Mr. Gilbert observed a youth making strange contortions of face as he hung over the hutch gate of Borlase's house; and being told by a companion that he was "the son of Davy the carver," and very fond of making chemical experiments, he had a talk with the lad, and discovering his talents, was ever afterwards his staunch friend and patron.

Through his two friends, Mr. Gilbert and Mr. Watt, Davy formed the acquaintance of Dr. Beddoes, who was just setting up at Bristol, under the t.i.tle of Pneumatic Inst.i.tution, an establishment for investigating the medical properties of different gases; and who, appreciating his abilities, gave him the superintendence of the new inst.i.tution.

Although only twenty years of age at this time, Davy was well abreast of the science of the day, and soon applied his vigorous and searching intellect to several successful investigations. His first scientific discovery was the detection of siliceous earth in the outer coating of reeds and gra.s.ses. A child was rubbing two pieces of bonnet cane together, and he noticed that a faint light was emitted; and on striking them sharply together, vivid sparks were produced just as if they had been flint and steel. The fact that when the outer skin was peeled off this property was destroyed, showed that it was confined to the skin, and on subjecting it to a.n.a.lysis silex was obtained, and still more in reeds and gra.s.ses.

As superintendent of Dr. Beddoe's inst.i.tution, his attention was, of course, chiefly directed to the subject of gases, and with the enthusiasm of youth, he applied himself ardently to the investigation of their elements and effects, attempting several very dangerous experiments in breathing gases, and more than once nearly sacrificing his life. In the course of these experiments he found out the peculiar properties of nitrous oxide, or, as it has since been popularly called, "laughing gas," which impels any one who inhales it to go through some characteristic action,--a droll fellow to laugh, a dismal one to weep and sigh, a pugnacious man to fight and wrestle, or a musical one to sing.

At twenty-two years of age, such was the reputation he had acquired, that he got the appointment of lecturer at the Royal Inst.i.tution, which was just then established, and found himself in a little while not only a man of mark in the scientific, but a "lion" in the fas.h.i.+onable world.

Natural philosophy and chemistry had begun to attract a good deal of attention at that time; and Davy's enthusiasm, his clear and vivid explanations of the mysteries of science, and the poetry and imagination with which he invested the dry bones of scientific facts, caught the popular taste exactly. His lecture-room became a fas.h.i.+onable lounge, and was crowded with all sorts of distinguished people. The young lecturer became quite the rage, and was petted and feted as the lion of the day.

It was only six years back that he was the druggist's boy in a little country town, alarming and annoying the household with his indefatigable experiments. He could hardly have imagined, as one of his day-dreams at the sea-side, that his fame would be acquired so quickly.

In spite of all the flatteries and attentions which were showered upon him, Davy stuck manfully to his profession; and if his reputation was somewhat artificial and exaggerated at the commencement, he amply earned and consolidated it by his valuable contributions to science during the rest of his career.

The name of Humphrey Davy will always be best known from its a.s.sociation with the ingenious safety lamp which he invented, and which well ent.i.tles him to rank as one of the benefactors of mankind. It was in the year 1815 that Davy first turned his attention to this subject. Of frequent occurrence from the very first commencement of coal-mining, the number of accidents from fire-damp had been sadly multiplied by the increase of mining operations consequent on the introduction of the steam engine. The dreadful character of some of the explosions which occurred about this time, the appalling number of lives lost, and the wide-spread desolation in some of the colliery districts which they had occasioned, weighed heavily on the minds of all connected with such matters. Not merely were the feelings of humanity wounded by the terrible and constant danger to which the intrepid miners were exposed, but it began to be gravely questioned whether the high rate of wage which the collier required to pay him not only for his labour, but for the risk he ran, would admit of the mines being profitably worked. It was felt that some strenuous effort must be made to preserve the miners from their awful foe. Davy was then in the plenitude of his reputation, and a committee of coal-owners besought him to investigate the subject, and if possible provide some preventative against explosions. Davy at once went to the north of England, visited a number of the princ.i.p.al pits, obtained specimens of fire-damp, a.n.a.lyzed them carefully, and having discovered the peculiarities of this element of destruction, after numerous experiments devised the safety-lamp as its antagonist.

The principles upon which this contrivance rests, are the modification of the explosive tendencies of fire-damp (the inflammable gas in mines) when mixed with carbonic acid and nitrogen; and the obstacle presented to the pa.s.sage of an explosion, if it should occur, through a hole less than the seventh of an inch in diameter; and accordingly, while the small oil lamp in burning itself mixes the surrounding gas with carbonic acid and nitrogen, the cylinder of wire-gauze which surrounds it prevents the escape of any explosion. It is curious that George Stephenson, the celebrated engineer, about the same time, hit on much the same expedient.