Chaps. 20-31.

Chap. 20.—The Different Kinds of Copper and Its Combinations. Pyropus. Campanian Copper.

We will now return to the different kinds of copper, and its several combinations. In Cyprian copper we have the kind known as “coronarium,” [See B. xxxiii. c.. “Chaplet” copper.] and that called “regulare,” [“Bar” copper, or “malleable.”] both of them ductile. The former is made into thin leaves, and, after being coloured with ox-gall, [It is very improbable that this effect could be produced by the cause here assigned; but without a more detailed account of the process employed, we cannot explain the change of colour.—B.] is used for what has all the appearance of gilding on the coronets worn upon the stage. The same substance, if mixed with gold, in the proportion of six scruples of gold to the ounce, and reduced into thin plates, acquires a fiery red colour, and is termed “pyropus.” [Πυρωπὸς, “sparkling like fire.” Similar to, if not identical with, our tinsel.] In other mines again, they prepare the kind known as “regulare,” as also that which is called “caldarium.” [“Cast brass.”] These differ from each other in this respect, that, in the latter, the metal is only fused, and breaks when struck with the hammer, whereas the “regulare” is malleable, or ductile, [See Beckmann, Hist. Inv. Vol. I. p. 415. Bohn’s Edition.] as some call it, a property which belongs naturally to all the copper of Cyprus. In the case, however, of all the other mines, this difference between bar copper and cast brass is produced by artificial means. All the ores, in fact, will produce bar or malleable copper when sufficiently melted and purified by heat. Among the other kinds of copper, the palm of excellence is awarded to that of Campania, [In the former Editions the whole of the next ten lines, from this word down to “sun” is omitted. It is evident that it has been left out by accident, in consequence of the recurrence of the word “Campano.” The hiatus has been supplied from the Bamberg MS., and the reading is supported by the text of Isidorus, Orig. B. xvi. c. 20, s. 9.] which is the most esteemed for vessels and utensils. This last is prepared several ways. At Capua it is melted upon fires made with wood, and not coals, after which it is sprinkled with cold water and cleansed through a sieve made of oak. After being thus smelted a number of times, Spanish silver-lead is added to it, in the proportion of ten pounds of lead to one hundred pounds of copper; a method by which it is rendered pliable, and made to assume that agreeable colour which is imparted to other kinds of copper by the application of oil and the action of the sun. Many parts, however, of Italy, and the provinces, produce a similar kind of metal; but there they add only eight pounds of lead, and, in consequence of the scarcity of wood, melt it several times over upon coals. It is in Gaul more particularly, where the ore is melted between red-hot stones, that the difference is to be seen that is produced by these variations in the method of smelting. Indeed, this last method scorches the metal, and renders it black and friable. Besides, they only melt it twice; whereas, the oftener this operation is repeated, the better in quality it becomes.

(9.) It is also as well to remark that all copper fuses best when the weather is intensely cold. The proper combination for making statues and tablets is as follows: the ore is first melted; after which there is added to the molten metal one third part of second-hand [“Collectanei.”] copper, or in other words, copper that has been in use and bought up for the purpose. For it is a peculiarity of this metal that when it has been some time in use, and has been subject to long-continued friction, it becomes seasoned, and subdued, as it were, to a high polish. Twelve pounds and a half of silver-lead are then added to every hundred pounds of the fused metal. There is also a combination of copper, of a most delicate nature, “mould-copper,” [“Formalis.”] as it is called; there being added to the metal one tenth part of lead [“Plumbi nigri”—“black lead,” literally, but not what we mean by that name.] and one twentieth of silver-lead, this combination being the best adapted for taking the colour known as “Græcænicus.” [The “Grecian” colour. It does not appear to have been identified, nor does it appear what it has to do with moulds.] The last kind is that known as “ollaria,” [“Pot” copper, or brass.] from the vessels that are made of it: in this combination three or four pounds of silver-lead [Beckmann is of opinion that this “plumbum argentarium” was a mixture of equal parts of tin and lead. Hist. Inv. Vol. II, p. 220. Bohn’s Edition.] are added to every hundred pounds of copper. By the addition of lead to Cyprian copper, the purple tint is produced that we see upon the drapery of statues.

Chap. 21.—The Method of Preserving Copper.

Copper becomes covered with verdigris more quickly when cleaned than when neglected, unless it is well rubbed with oil. It is said that the best method of preserving it is with a coating of tar. The custom of making use of copper for monuments, which are intended to be perpetuated, is of very ancient date: it is upon tablets of brass that our public enactments are engraved.

Chap. 22. (10.)—Cadmia.

The ores of copper furnish a number of resources [Most of these preparations are in reality highly dangerous. Oxides, however, or salts of copper, have been employed internally with success, acting by alvine evacuation and by vomiting. The Crocus Veneris of the old chemists was an oxide of copper. It is still used by the peasants of Silesia, Ajasson says.] that are employed in medicine; indeed, all kinds of ulcers are healed thereby with great rapidity. Of these, however, the most useful is cadmia. [It is obvious that the “cadmia” here described must be an essentially different substance from the “cadmia” mentioned in the second Chapter of this Book, that being a natural production, possibly calamine or hydrosilicate or carbonate of zinc; while the “cadmia” of this Chapter is a furnace-calamine, a product of the fusion of the ore of copper, or zinc.—B. It is evident, too, that copper ores, impregnated with zinc or calamine, also passed under this name. See Beckmann, Hist. Inv. Vol. II. pp. 33-35, Bohn’s Edition, where this subject is discussed at considerable length: also the treatise by Delafosse, in Lemaire’s Edition of Pliny.] This substance is formed artificially, beyond a doubt, in the furnaces, also, where they smelt silver, but it is whiter and not so heavy, and by no means to be compared with that from copper. There are several kinds of it. For, as the mineral itself, from which it is prepared artificially, so necessary in fusing copper ore, and so useful in medicine, has the name of “cadmia,” [The metal known to us as “cadmium” was discovered by Professor Stromeyer in 1818: it is either associated in its ores with zinc, or forms a native sulphuret.] so also is it found in the smelting-furnaces, where it receives other names, according to the way in which it is formed. By the action of the flame and the blast, the more attenuated parts of the metal are separated, and become attached, in proportion to their lightness, to the arched top and sides of the furnace. These flakes are the thinnest near the exterior opening of the furnace, where the flame finds a vent, the substance being called “capnitis;” [“Smoky residue.” None of these substances formed in smelting are preserved for medicinal purposes at the present day. Tutty is an impure oxide of zinc.] from its burnt appearance and its extreme lightness it resembles white ashes. The best is that which is found in the interior, hanging from the arches of the chimney, and from its form and position named “botryitis.” [“Cluster residue.” From its resemblance to a bunch of grapes.] It is heavier than the first-mentioned kind, but lighter than those which follow. It is of two different colours: the least valuable is ash-coloured, the better kind being red, friable, and extremely useful as a remedy for affections of the eyes.

A third kind of cadmia is that found on the sides of the furnace, and which, in consequence of its weight, could not reach the arched vaults of the chimney. This species is called “placitis,” [“Caked residue.”] in reference to its solid appearance, it presenting a plane surface more like a solid crust than pumice, and mottled within. Its great use is, for the cure of itch-scab, and for making wounds cicatrize. Of this last there are two varieties, the “onychitis,” which is almost entirely blue on the exterior, and spotted like an onyx within; and the “ostracitis,” [“Shell-formed residue.”] which is quite black and more dirty than the others, but particularly useful for healing wounds. All the species of cadmia are of the best quality from the furnaces of Cyprus. When used in medicine it is heated a second time upon a fire of pure charcoal, and when duly incinerated, is quenched in Aminean [See B. xiv. c. 16.] wine, if required for making plasters, but in vinegar, if wanted for the cure of itch-scab. Some persons first pound it, and then burn it in earthen pots; which done, they wash it in mortars and then dry it.

Nymphodorus [See end of B. iii.] recommends that the most heavy and dense pieces of mineral cadmia that can be procured, should be burnt upon hot coals and quenched in Chian wine; after which, it must be pounded and then sifted through a linen cloth. It is then pulverized in a mortar and macerated in rain water, the sediment being again pounded until it is reduced to the consistency of ceruse, and presents no grittiness to the teeth. Iollas [See end of B. xii.] recommends the same process; except that he selects the purest specimens of native cadmia.

Chap. 23.—Fifteen Remedies Derived from Cadmia. Ten Medicinal Effects of Calcined Copper.

Cadmia [We have the same account of the medicinal effects of Cadmia, and the other preparations mentioned in this Chapter, given by Dioscorides.—B.] acts as a desiccative, heals wounds, arrests discharges, acts detergently upon webs and foul incrustations of the eyes, removes eruptions, and produces, in fact, all the good effects which we shall have occasion to mention when speaking of lead. Copper too, itself, when calcined, is employed for all these purposes; in addition to which it is used for white spots and cicatrizations upon the eyes. Mixed with milk, it is curative also of ulcers upon the eyes; for which purpose, the people in Egypt make a kind of eye-salve by grinding it upon whet stones. Taken with honey, it acts as an emetic. For these purposes, Cyprian copper is calcined in unbaked earthen pots, with an equal quantity of sulphur; the apertures of the vessel being well luted, and it being left in the furnace until the vessel itself has become completely hardened. Some persons add salt, and others substitute alum [For an account of the “alumen” of the ancients, see B. xxxv. c..] for sulphur; others, again, add nothing, but merely sprinkle the copper with vinegar. When calcined, it is pounded in a mortar of Thebaic stone, [See B. xxxiii. c., and B. xxxvi. c..] after which it is washed with rain water, and then pounded with a large quantity of water, and left to settle. This process is repeated until the deposit has gained the appearance of minium; [See B. xxxiii. c..] after which it is dried in the sun, and put by for keeping in a box made of copper.

Chap. 24. (11.)—The Scoria of Copper.

The scoria, too, of copper is washed in the same manner; but the action of it is less efficacious than that of copper itself. The flower, too, of copper [“Æris flos.” Ajasson makes some correct remarks upon the difference between the “scoria” and the “flower” of the metal. The former may be considered as consisting of the metal, mixed with a certain proportion of heterogeneous matter, which has been separated during the fusion of the ore, while the latter consists of the pure metal in a state of mechanical division.—B.] is also used in medicine; a substance which is procured by fusing copper, and then removing it into another furnace, where the repeated action of the bellows makes the metal separate into small scales, like the husks of millet, and known as “flower of copper.” These scales are also separated, when the cakes of metal are plunged into water: they become red, too, like the scales of copper known as “lepis,” [From the Greek λεπὶς, “husk,” or “scale.”] by means of which the genuine flower of copper is adulterated, it being also sold under that name. This last is made by hammering nails that are forged from the cakes of metal. All these processes are principally carried on in the furnaces of Cyprus; the great difference between these substances being, that this lepis is detached from the cakes by hammering, whereas the flower falls off spontaneously.

Chap. 25.—Stomoma of Copper; Forty-seven Remedies.

There is another finer kind of scale which is detached from the surface of the metal, like a very fine down, and known as “stomoma.” [Ajasson describes this substance as consisting merely of the pure metal in a state of minute mechanical division; it would appear, therefore, to be scarcely, if at all, different from the articles described in the last Chapter. The word Στόμωμα means a “hard substance,” or “hard scales,” therefore the application of this term to a substance like down, “lanugo,” is perhaps not very appropriate.—B.] But of all these substances, and even of their names, the physicians, if I may venture so to say, are quite ignorant, as appears by the names they give them; so unacquainted are they with the preparation of medicaments, a thing that was formerly considered the most essential part of their profession. [Beckmann comments at some length on this passage; Vol. I. p. 328. Bohn’s Edition.] At the present day, whenever they happen to find a book of recipes, if they wish to make any composition from these substances, or, in other words, to make trial of the prescription at the expense of their unhappy patients, they trust entirely to the druggists, [“Seplasiæ.” The druggists dwelling in the Seplasia. See B. xxxiii. c..] who spoil everything by their fraudulent adulterations. For this long time past, they have even purchased their plasters and eye-salves ready made, and the consequence is, that the spoiled or adulterated wares in the druggists’ shops are thus got rid of.

Both lepis and flower of copper are calcined in shallow earthen or brazen pans; after which they are washed, as described above, [In Chapters and, as applied to Cadmia and Cyprian copper, respectively.—B.] and employed for the same purposes; in addition to which, they are used for excrescences in the nostrils and in the anus, as also for dullness of the hearing, being forcibly blown into the ears through a tube. Incorporated with meal, they are applied to swellings of the uvula, and, with honey, to swellings of the tonsils. The scales prepared from white copper are much less efficacious than those from Cyprian copper. Sometimes they first macerate the nails and cakes of copper in a boy’s urine; and in some instances, they pound the scales, when detached, and wash them in rain water. They are then given to dropsical patients, in doses of two drachmæ, with one semisextarius of honied wine: they are also made into a liniment with fine flour.

Chap. 26.—Verdigris; Eighteen Remedies.

Verdigris [“Ærugo.” The researches of modern chemists have ascertained the composition of verdigris to be a diacetete of copper; the sesquibasic acetate and the triacetate are also to be considered as varieties of this substance; we have an exact analysis of these salts in the “Elements” of the late Dr. Turner, the Sixth Edition, edited by Professor Liebig and Mr. W. Turner, pp. 931, 2. Most of the processes described in this Chapter are mentioned by Dioscorides.—B. See also Beckmann, Hist. Inv. Vol. I. p. 171, et seq., Bohn’s Edition.] is also applied to many purposes, and is prepared in numerous ways. Sometimes it is detached already formed, from the mineral from which copper is smelted: and sometimes it is made by piercing holes in white copper, and suspending it over strong vinegar in casks, which are closed with covers; it being much superior if scales of copper are used for the purpose. Some persons plunge vessels themselves, made of white copper, into earthen pots filled with vinegar, and scrape them at the end of ten days. Others, again, cover the vessels with husks of grapes, [According to Brotero, this is the process generally adopted in France, in preference to the employment of vinegar in a pure state.—B.] and scrape them in the same way, at the end of ten days. Others sprinkle vinegar upon copper filings, and stir them frequently with a spatula in the course of the day, until they are completely dissolved. Others prefer triturating these filings with vinegar in a brazen mortar: but the most expeditious method of all is to add to the vinegar shavings of coronet copper. [The form of copper which was termed “coronarium” has been already described in Chapter.—B.] Rhodian verdigris, more particularly, is adulterated with pounded marble; some persons use pumice-stone or gum.

The adulteration, however, which is the most difficult to detect, is made with copperas; [“Atramento sutorio.” “Shoemakers’ black.” See Chapters and of this Book.] the other sophistications being detected by the crackling of the substance when bitten with the teeth. The best mode of testing it is by using an iron fire-shovel; for when thus subjected to the fire, if pure, the verdigris retains its colour, but if mixed with copperas, it becomes red. The fraud may also be detected by using a leaf of papyrus, which has been steeped in an infusion of nut-galls; for it becomes black immediately upon the genuine verdigris being applied. It may also be detected by the eye; the green colour being unpleasant to the sight. But whether it is pure or adulterated, the best method is first to wash and dry it, and then to burn it in a new earthen vessel, turning it over until it is reduced to an ash; [Until it assumes an ashy colour, Dioscorides says.—B.] after which it is pounded and put by for use. Some persons calcine it in raw earthen vessels, until the earthenware becomes thoroughly baked: others again add to it male frankincense. [See B. xii. cc. 30, 32.] Verdigris is washed, too, in the same manner as cadmia.

It affords a most useful ingredient for eye-salves, and from its mordent action is highly beneficial for watery humours of the eyes. It is necessary, however, to wash the part with warm water, applied with a fine sponge, until its mordency is no longer felt.

Chap. 27.—Hieracium.

“Hieracium” [According to Celsus, this substance obtained its name from the person who invented or compounded it; he calls it “Collyrium of Hierax.”—B.] is the name given to an eye-salve, which is essentially composed of the following ingredients; four ounces of sal ammoniac, two of Cyprian verdigris, the same quantity of the kind of copperas which is called “chalcanthum,” [“Atramenti sutorii, quod chalcanthum vocant.” We may presume that this substance was somewhat different from the “atramentum sutorium” mentioned in the last Chapter: the word “chalcanthum” means “flower of copper;” χαλκοῦ ἄνθος.—B. Delafosse identities it with blue vitriol, sulphate, or hydro-trisulphate of copper. See Chapter.] one ounce of misy [See Chapter.] and six of saffron; all these substances being pounded together with Thasian vinegar and made up into pills. It is an excellent remedy for incipient glaucoma and cataract, as also for films upon the eyes, eruptions, albugo, and diseases of the eye-lids. Verdigris, in a crude state, is also used as an ingredient in plasters for wounds. In combination with oil, it is wonderfully efficacious for ulcerations of the mouth and gums, and for sore lips. Used in the form of a cerate, it acts detergently upon ulcers, and promotes their cicatrization. Verdigris also consumes the callosities of fistulas and excrescences about the anus, either used by itself, applied with sal ammoniac, or inserted in the fistula in the form of a salve. The same substance, kneaded with one third part of resin of turpentine, removes leprosy.

Chap. 28. (12.)—Scolex of Copper; Eighteen Remedies.

There is another kind of verdigris also, which is called “scolex.” [From the Greek σκωλὴξ, “a worm,” “Vermicular Verdigris.”—“The accounts of this substance in ancient authors seem to some commentators to be obscure; but in my opinion we are to understand by them that the ingredients were pounded together till the paste they formed assumed the appearance of pieces or threads like worms. For the same reason the Italians give the name of vermicelli to wire-drawn paste of flour used in cookery.”—Beckmann, Hist. Inv. Vol. I. p. 173, Bohn’s Edition.] It is prepared by triturating in a mortar of Cyprian copper, alum and salt, or an equal quantity of nitre, with the very strongest white vinegar. This preparation is only made during the hottest days of the year, about the rising of the Dog-star. The whole is triturated until it becomes green, and assumes the appearance of small worms, to which it owes its name. This repulsive form is corrected by mixing the urine of a young child, with twice the quantity of vinegar. Scolex is used for the same medicinal purposes as santerna, which we have described as being used for soldering gold, [In B. xxxiii. c..—B.] and they have, both of them, the same properties as verdigris. Native scolex is also procured by scraping the copper ore of which we are about to speak.

Chap. 29.—Chalcitis: Seven Remedies.

Chalcitis [The name, no doubt, of a copper ore which has not been identified. Delafosse suggests that it may have been an ore of iron and copper pyrites in combination with a silky copper malachite. See Chapter of this Book, and B. xxxv. c..] is the name of a mineral, from which, as well as cadmia, copper is extracted by heat. It differs from cadmia in this respect, that this last is procured from beds below the surface, while chalcitis is detached from rocks that are exposed to the air. Chalcitis also becomes immediately friable, being naturally so soft as to have the appearance of a compressed mass of down. There is also this other distinction between them, that chalcitis is a composition of three other substances, copper, misy, and sory, [Brongniart is of opinion that the “sory” of Pliny is the sulphate of copper, probably with an excess of acid. He informs us that he has received a specimen of a native sulphate of copper from Cuença, in Spain, which possesses all the characteristics of “sory” as here described. He considers it more difficult to ascertain the chemical composition of “misy,” but is disposed to consider it as a mixed sulphate of iron and copper.—B.] of which last we shall speak in their appropriate places. [In the next two Chapters.—B.] The veins of copper which it contains are oblong. The most approved kind is of the colour of honey; it is streaked with fine sinuous veins, and is friable and not stony. It is generally thought to be most valuable when fresh, as, when old, it becomes converted into sory. It is highly useful for removing fleshy excrescences in ulcers, for arresting hæmorrhage, and, in the form of a powder, for acting astringently upon the gums, the uvula, and the tonsillary glands. [We have a similar account of its medicinal virtues given us by Dioscorides; Celsus also enumerates chalcitis among the corrosives, or cauteries, “quæ exedunt corpus.” He also recommends it for affections of the eyes.—B.] It is applied in wool, as a pessary, for affections of the uterus; and with leek juice it is formed into plasters for diseases of the genitals. This substance is macerated for forty days in vinegar, in an earthen vessel luted with dung; after which it acquires a saffron colour. When this composition is mixed with an equal proportion of cadmia, it forms the medicament known as “psoricon.” [“Sore ointment.”] If two parts of chalcitis are combined with one of cadmia, the medicament becomes more active; and it is rendered still more powerful if vinegar is used instead of wine. For all these purposes, calcined chalcitis is the most efficacious.

Chap. 30.—Sory: Three Remedies.

The sory [See Note above.] of Egypt is the most esteemed, being considered much superior to that of Cyprus, Spain, and Africa; although some prefer the sory from Cyprus for affections of the eyes. But from whatever place it comes, the best is that which has the strongest odour, and which, when triturated, becomes greasy, black, and spongy. It is a substance so unpleasant to the stomach, that some persons are made sick merely by its smell. This is the case more particularly with the sory from Egypt. That from other countries, by trituration, acquires the lustre of misy, and is of a more gritty consistency. Held in the mouth, and used as a collutory, it is good for toothache. It is also useful for malignant ulcers of a serpiginous nature. It is calcined upon charcoal, like chalcitis.

Chap. 31.—Misy: Thirteen Remedies.

Some persons have stated, that misy [See Note above. Hardouin calls this substance “yellow copperas,” or “Roman vitriol.”] is formed by the calcination of the mineral, in trenches; [“In scrobibus.” The mineral alluded to is Chalcitis, mentioned in Chapter.—B.] its fine yellow powder becoming mixed with the ashes of the burnt fire-wood. The fact is, however, that though obtained from the mineral, it is already formed, and in compact masses, which require force to detach them. The best is that which comes from the manufactories of Cyprus, its characteristics being, that when broken, it sparkles like gold, and when triturated, it presents a sandy or earthy appearance, like chalcitis. Misy is used in the process of refining gold. Mixed with oil of roses, it is used as an injection for suppurations of the ears, and, in combination with wool, it is applied to ulcers of the head. It also removes inveterate granulations of the eye-lids, and is particularly useful for affections of the tonsils, quinsy, and suppurations. For these maladies, sixteen drachmæ should be mixed with one semisextarius of vinegar, and boiled with the addition of some honey, until it becomes of a viscous consistency; in which state it is applicable to the different purposes above mentioned. When its action is wanted to be modified, a sprinkling of honey is added. A fomentation of misy and vinegar removes the callosities of fistulous ulcers; it also enters into the composition of eye-salves. It arrests hæmorrhage, prevents the spreading of serpiginous and putrid ulcers, and consumes fleshy excrescences. It is particularly useful for diseases of the male generative organs, and acts as a check upon menstruation.