A History of Inventions, Discoveries, and Origins, Volume II (of 2)

The invention of converting bar iron into steel by dipping it into other fused iron, and suffering it to remain there several hours, is commonly ascribed to Reaumur826. But this process is mentioned by Agricola, Imperati and others, as a thing well-known and practised in their time.

Pliny, Daimachus827 and other ancient writers mention various countries and places which, in their time, produced excellent steel. Among the dearest kinds were the ferrum Indicum and Sericum. The former appears to be the ferrum candidum, a hundred talents of which were given as a present to Alexander in India828. Is it not probable that this was the excellent kind of steel still common in that country, and known under the name of wootz, some pieces of which were sent from Bombay in the year 1795 to the Royal Society of London? Its silver-coloured appearance when polished may have, perhaps, given occasion to the epithet of candidum. The method of preparing it is still unknown, but it is supposed to be a kind of fused steel829. This however is a mere conjecture, unsupported by any proofs830. At what time was damasked steel obtained from the Levant?

[Three kinds of steel are now principally manufactured; bar or blistered steel, shear steel and cast steel.

The bar or blistered steel is made by the process of cementation: this consists in putting bars of the purest malleable iron alternately with layers of charcoal or soot into a proper furnace; the air being carefully excluded and the whole kept at a red heat for several days. By this process the carbon combines with the iron, altering its texture from fibrous to granular or crystalline, and rendering the surface blistered. The action of the carbon occasions fissures and cavities in the substance of the bars, rendering them unfit for tool-making, until they are condensed and rendered uniform by the operation of tilting, i. e. compression by a powerful hammer worked by machinery.

Shear steel is made by breaking up bars of blistered steel into lengths of about 18 inches, and binding four or six of them together with a steel rod, and then heating them to a full welding heat, the surface being covered with fine clay or sand to prevent oxidation. They are then drawn out into a bar, hammered, tilted and rolled. In this state it is susceptible of a much finer polish, and is also more tenacious and malleable, and fit for making strong springs, knives, &c.

Cast steel, which was first made by Mr. Huntsman at Attercliff, Sheffield, in 1770, is made by melting blistered steel, casting it into ingots and rolling it into bars. In this condition its texture is much more uniform, closer and finer grained. The different degrees of hardness required for steel are given by the process called tempering, which is effected by heating the steel up to a certain temperature, and then quenching it suddenly in cold water. Its hardness and brittleness are thus much increased, but it may be again softened by exposure to heat simply.]

STAMPING-WORKS 831

In order to separate metallic ores from the barren rock or stones with which they occur, and to promote their fusion, it is necessary that the pieces of rock or stone should be reduced to small fragments by stamping them. For those ores which occur in a sandy form, this is unnecessary; and in regard to rich silver ore, which contains very little or no lead and other metals, this process might be hurtful; for with dry stamping a great deal would fly off in dust, and with wet stamping a considerable part would be washed away by the water.

However imperfect the knowledge of the ancients may have been in regard to the fusion of ores, they were acquainted with the benefit of stamping; but the means they employed for that purpose were the most inconvenient and expensive. They reduced the ore to coarse powder, by pounding it in mortars, and then ground it in hand-mills, like those used for corn, till it acquired such a degree of fineness that it could be easily washed. This is proved by the scanty information which we find in Diodorus Siculus832 and Agatharcides833, in regard to the gold mines of the Egyptians; in Hippocrates, respecting the smelting-works of the Greeks834, and in Pliny in regard to the metallurgy of the Romans835. Remains of such mortars and mills as were used by the ancients have been found in places where they carried on metallurgic operations; for instance, in Transylvania and the Pyrenees. The hand-mills had a resemblance to our mustard-mills836; and for washing the mud they employed a sieve, but in washing auriferous sand they made use of a raw hide. From the latter, Count von Veltheim has explained, in a very ingenious manner, the fable of the ancients concerning the ants which dug up gold837.

Our works for pounding ore, at present, are stamping-mills, which consist of heavy stampers shod with iron. These stampers are put in motion by a cylinder furnished with cogs, which is driven by a water-wheel, and pound the ore in troughs lined with iron. When the ore subjected to this operation is poor, water is introduced into the troughs, which running through grates in the bottoms of them, carries with it the pounded matter into a gutter, where it becomes purified, and deposits the mud mixed with sand.

One might conjecture that this apparatus was invented soon after the invention of cylinders with cogs; but this was not the case, though I am not able to determine the antiquity of these cylinders. At any rate, it is certain that mortars and sieves were used in Germany throughout the whole of the fifteenth century; and in France, to which the art of mining was conveyed in general from that country at a late period, they were still employed about the year 1579838. In the oldest times men were not acquainted with the art of employing water at mines in so advantageous a manner as at present. The bellows were worked by men; and those aqueducts raised on posts, by which distant water may be made to act on machines, was not yet invented. On this account, remains of ore are found in places where the moderns, in consequence of that indispensable article water, would not be able to maintain metallurgic works839. According to the researches which I have hitherto had an opportunity to make, our stamping-mills were invented about the beginning of the sixteenth century, and, as appears, in Germany; but I cannot determine with certainty either the name of the inventor or his country. Those who established or introduced the first stamping-works in Saxony and the Harz are only mentioned; and these, as usual, have been considered as the inventors.

In the year 1519 the processes of sifting and wet-stamping were established in Joachimsthal by Paul Grommestetter, a native of Schwarz, named on that account the Schwarzer, whom Melzer praises as an ingenious and active washer; and we are told that he had before introduced the same improvements at Schneeberg. Soon after, that is in 1521, a large stamping-work was erected at Joachimsthal, and the process of washing was begun. A considerable saving was thus made, as a great many metallic particles were before left in the washed sand, which was either thrown away or used as mortar for building. In the year 1525 Hans Pörtner employed at Schlackenwalde the wet method of stamping, whereas before that period the ore there was ground.

In the Harz this invention was introduced at Wildenmann by Peter Philip, who was assay-master there, soon after the works at the Upper Harz were resumed by Duke Henry the younger about the year 1524. This we learn from the papers of Herdan Hacke or Hæcke, who was preacher at Wildenmann in 1572. As far as can be concluded from his imperfect information, the first stamping-work there consisted only of a stamper raised by means of two levers fixed to the axis of a wheel. The pounded ore was then thrown into a sieve, called in German the sachs840, and freed from the coarser parts. But as this stamping was performed in the dry manner, it produced so much dust that the labourers were impeded by it, and the ore on that account could not be properly smelted. The business however was not given up; new improvements were made, and soon after Simon Krug and Nicholas Klerer introduced the wet method, and fortunately brought it to perfection841.

It is said in several modern works that wet stamping was invented in 1505, by a Saxon nobleman named von Maltitz. This assertion has been so often repeated, that it was known to Gobet842, who adopted it as truth. I have not however been able to find the historian on whose testimony it is founded; but it appears by Gauhen’s Dictionary of Nobility that Sigismund Maltitz was chief surveyor of forests at the Erzgebürge, to the electorate of Saxony in the sixteenth century.

KITCHEN VEGETABLES

The greater part of our kitchen vegetables, that is to say those plants which, independently of the corn kinds, are cultivated as food in our gardens, are partly indigenous and partly foreign. Of the former many at present grow wild, such as asparagus; but by continued cultivation, through a long series of years, they have produced numerous varieties, which differ as much from the wild plants as the European females from those of New Zealand. Many of our indigenous vegetables are collected for food, but are not reared expressly for that purpose; and these even, in all probability, might be improved by culture. Some indeed are here and there reared in an artificial manner, though we reckon them among our weeds; for example, dandelion, Leontodon taraxacum, the first leaves of which in spring are employed in the northern countries as salad. In some parts of England this plant is sown throughout the whole summer; and its leaves being blanched, it is used in winter as endive. Culture frees many plants from their harsh taste, makes them tender, larger and more pulpy, and produces them at a season when the wild ones have become unfit for use.

Our foreign kitchen vegetables have, for the most part, been procured from the southern countries, but chiefly from Italy; and the number of them has increased in an uncommon degree in the course of the last two centuries. Many of them require laborious attention to make them thrive in our severe climate. On the other hand, some grow so readily, and increase so much without culture, even in the open fields, that they have become like indigenous weeds, as is the case with hops, which at present abound in our hedges. Some plants, however, both indigenous and foreign, which were formerly raised by art and used at the table, are no longer cultivated, because we have become acquainted with others more beneficial. Many of them served our forefathers in the room of foreign spices, to the use of which trading companies have accustomed us, much to their advantage and to our hurt. It is true also that many have been banished merely by fashion; for this tyrant, which rules with universal sway, commands the taste as well as the smell to consider as intolerable articles to which our ancestors had a peculiar attachment.

In the oldest times mankind were so fond of sweet things, that the goodness and agreeable taste of every kind of food was determined according to the degree of its sweetness; and such is the manner of judging even at present throughout all the East, in Africa, and in America. This is the case also among us with the greater part of the lower classes, who are not able to follow the mode of richer tables. In the northern countries this taste is almost everywhere prevalent. Thus the Swedes spoil, by the addition of sugar, costly Rhenish wine, sour kraut, and other articles, the agreeable tartness of which is gratifying to other nations. In proportion to their population and luxury, the Swedes seem to use more sugar than the Germans, and the Germans more than the English or French; and one might almost suspect that a taste for sweet things were in the inverse ratio of civilization843. At any rate, one can thus explain why many vegetable productions, which some centuries ago were reckoned among the most agreeable dishes, appear to us to be nauseously sweet. Skirret, which the emperor Tiberius caused to be brought for the use of his table from the Rhine, is little relished at present; and the case is the same with parsnips, some kinds of apples, and several other things.

Fashion sometimes recalls into use species long forgotten, and with the greatest success, when they are introduced under a different name. Thus, after an interval of many years, some began to cultivate again monks-rhubarb844, and to recommend this sourish plant instead of the more savoury spinage. According to Bock, it was transplanted in the middle ages by the monks from the woods into gardens, to which it has been again brought back under the imposing appellation of English spinage.

Before the commencement of the Christian æra, when the use of sensual enjoyments was not so well-regulated and modified by religious and political principles, many vegetables and other dishes were praised and recommended by writers on agriculture and cookery, as well as by the most favourite poets and eminent authors, on account of effects which cannot at present be named, except in the writings of physicians, without disgusting the reader and incurring the imputation of indelicacy. When this mode of thinking began to prevail, people detested to see in their gardens or on their tables plants which, in consequence of indecent properties, were generally known; and by being thus disused, the knowledge of them was at length so much lost, that we know only their old names, and what the ancients have related respecting them. In this manner, many receipts in Apicius are totally unintelligible, because we are no longer acquainted with the things for the preparation of which he gives directions. Of this kind are the numerous bulbous roots (bulbi), which formed the most favourite dishes of the Greeks and the Romans, and which at present no botanist, much less commentator, would be able to determine. They belong to the lost arts, but not to those which were abandoned because better ones were found to supply their place. The American vanilla, which perhaps was indebted only to its high price for the permission of being mixed with chocolate, does not certainly supply the place of the ancient Megarean bulbs, as our gunpowder does that of the Greek fire.

Among those kitchen vegetables which were formerly cultivated, but at present are no more esteemed, are the following: – Winter-cresses845, an indigenous plant, the young leaves of which, like water-cresses, may be eaten in winter as salad; also common alexanders846, which in the seventeenth century was used instead of celery; bulbous chærophyllum847, the roots of which are still brought to market at Vienna, where people well know what is good, and where they are boiled and eaten as salad with vinegar and oil. Rampion848 was formerly used in the like manner. The earth-nut849, which grows wild in many parts of Germany, is still cultivated in Holland and in some districts on the Rhine. Rocket (Eruca sativa), the young leaves of which were readily eaten by our forefathers as salad, is no longer esteemed, partly on account of its harsh taste, and partly on account of its nauseous smell, which resembles that of rancid bacon; it has however been still retained in Italy, “excitet ut Veneri tardos eruca maritos850.” Vetches (Lathyrus sativus, and Cicer) are now banished from our gardens, as experience has shown that they are prejudicial to the health. When pepper was so dear, that to promise a saint yearly a pound of it was considered as a liberal bequest, economical housewives seasoned their dishes with the leaves of pepper-wort (Lepidium latifolium), which on this account is called at present in England poor man’s pepper.

Borage (Borago officinalis), since the fourteenth, or at least the fifteenth century, has been sown not only for medicinal purposes, but for the use of the kitchen. The young leaves, which however soon become hard, rough, and unfit for the table, were used in soup, and the beautiful blue flowers were put into salad and wine. This plant was not known to the ancients; for the conjecture that it was what they called buglossum, is not very probable. As far as I have been able to learn, Nicholas Myrepsus, who lived in the beginning of the fourteenth century, is the first who uses the name πουράκιον, which certainly means borago. But who knows whence this writer, who introduces in his works a great many new inexplicable names, some of them formed from the Greek, Latin, and Italian, obtained that appellation? Some of the old botanists have conjectured that it is derived from the word corago, which Apuleius, whose period is uncertain, gives as a synonym of buglossum. Some think that the reading in Apuleius ought to be borago; and others assert that corago is the true name, and arose from the quality which the plant has of strengthening the heart; consequently we ought properly to read corago, and not borago851. It is probable that our forefathers, under the idea that their borage was the buglossum of the ancients, and therefore had the property of strengthening the heart, threw the flowers into wine, that their spirits might by these means be more enlivened. Our borage is certainly a foreign plant, and Cæsalpinus said that it was brought from other countries to Italy. Linnæus852 positively states that it first came from Aleppo; but I have not yet been able to find on what authority this assertion is founded. At present borage, at least in the German cookery, is no longer used.

Among the kitchen vegetables of which no certain traces are to be found in the works of the ancients, is spinage (Spinacea oleracea). Its native country is unknown; but the name is new, and certainly derived from the nature of its prickly seeds. As far as I know, it first occurs in the year 1351, among the food used by the monks on fast-days853; and at that time it was Spinargium or Spinachium. Meursius found in the middle ages σπινάκιον, in a poem which he has often mentioned, but not defined with sufficient accuracy854. This plant seems to have been made known from Spain; for many of the old botanists, such for example as Bock, call it olus Hispanicum. Ruellius and others name it Atriplex Hispaniensis; and the latter adds, that the Arabians or Moors called it Hispanach, which signifies Spanish plant; it is however well known that formerly everything foreign was styled Spanish. None of the kitchen vegetables of the ancients seem to approach nearer to spinage than their Blitum, which Rondolet considered to be the same. But all the properties assigned to this vegetable production, namely, that it was insipid, and that on this account it was necessary to render it palatable by the addition of vinegar, pepper, and other things; that it readily multiplied; that it was indigestible and gently aperient; perfectly correspond, not only with our spinage, but with many other plants, such, for example, as our beet and orach, and the good king Henry (Chenopodium bonus Henricus), the young leaves of which are still dressed as spinage. It is also possible that the blitum of the ancients may have been a kind of Amaranthus, some species of which are certainly eatable. Blitum, therefore, will remain as difficult to be defined as the malva, which was used at the same time.

The Brassicæ of the ancients belonged certainly to the cabbage genus; yet no one, as far as I know, has examined botanically what is said of them, and completely proved their identity. It would however be fruitless labour to attempt to apply our modern names to the cabbage kinds of the ancients, and search out in the writings of the Greeks and the Romans those which we use at present; for by continued culture, through so many ages and in so many countries, new varieties have from time to time arisen, and old ones must have become lost; so that it is impossible for us to have all the varieties of the ancients, as it was for them to be acquainted with the whole of those produced in our times. I cannot therefore venture to assert that we still possess that kind of cabbage which the ancients, to prevent intoxication, ate raw like salad855. We can dress in this manner cabbage heads when they are chopped fine, but we do not know with certainty whether the ancients were acquainted with our cabbage; though Ruellius, not without probability, considered as such that species which in the time of Pliny was known under the name of lacuturris856.

But even if this be admitted as true, we nowhere find any traces of that excellent preparation of cabbage called by the Germans sour kraut; though the ancients were acquainted with the art of preparing turnips in the same manner857. I should have been inclined to consider sour kraut as a German invention, first made in Lower Saxony, which our neighbours learnt from us in modern times, had not Bellon858 related that the Turks are accustomed to pickle cabbage for winter food. It appears, however, that these people take the whole heads, as in Germany, but particularly in Upper more than Lower Saxony, some preserve kumskohl, a name which, as well as compost and the French word compote, Frisch derives with great probability from compositum (preserved).

The ancients were acquainted with curled cabbage, and even with some of those kinds which we call broccoli. Under this term is understood all those species, the numerous young flowery heads of which, particularly in spring and autumn, can be used like cauliflowers. Such young shoots are called cymæ, but not turiones; for the latter term denotes the first shoots that arise, like those of hops, asparagus, and other esculent plants. The broccoli used at present was however first brought from Italy to France, together with the name, about the end of the sixteenth century859.

Our cauliflower, about the end of the same century, was first brought from the Levant to Italy; and in the end of the seventeenth was transplanted thence to Germany. For a long time the seeds were procured annually from Cyprus, Candia, and Constantinople, by the Venetians and Genoese, who sent them to every part of Europe, because at that time the art of raising seed was not understood860. Prosper Alpinus, in the year 1588, found abundance of this vegetable in Egypt, and from his account there is reason to conjecture that it was then very little known in Europe. Conrad Gesner seems not to have been acquainted with it; at any rate it is not mentioned by him in a list of the cabbage kind of plants861. Even in the time of Bauhin it must have belonged to those vegetables which were scarce; because he has been so particular in naming the garden in which he saw it. Von Hohberg, who wrote about 1682, says that cauliflower, a few years before, had been brought to Germany for the first time862.

It would be difficult to define all the species of the cabbage kind, the leaves and flowers of which were used by the ancients as food; but it would be a task still more arduous to determine those which have esculent roots. To render this clear, and to show what information I have been able to obtain on the subject by my researches, I must venture to indulge in a little botanical criticism. Our plant-connoisseurs have unfortunately not yet condescended to examine the class of kitchen vegetables; though it would certainly be rendering a far greater service to botany, and promote its utility much more, to describe and delineate all the species, varieties, and deviations, than to give new names to a dozen of new genera from Polynesia. According to the Linnæan system, we have at present the following species of the cabbage, which have been adopted by all botanists, without further observation.

First, Brassica oleracea, to which belong all those kinds the leaves and flowers of which are eaten. It is certainly probable that all these have been gradually produced from one parent stock, which it is now impossible perhaps to find in its original wild state. A similarity is remarked between all these kinds; and with a little ingenuity one might form a genealogical tree of them, as Buffon has done in regard to the race of dogs; but a genealogical tree without proofs is of as little value in natural history as in claims for hereditary titles or estates. At present, in our system, we must admit that such plants as always grow up from their seeds, without variation, and do not pass into other forms, are peculiar species; but this will not prove that these supposed species were not originally produced from one maternal stem; for the variation of the succeeding plants took place gradually; and the later ones always deviated more and more from the parent stock. Who knows how many steps and gradations were necessary before cabbage, savoys, and cauliflower were produced from our common colewort? Not fewer, perhaps, than were required to produce white men from Moors, or the terrier and lap-dog from the bull-dog.