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CHAP. 49.
WALLS OF BRICK. THE METHOD OF MAKING BRICKS.
Earth for making bricks should never be extracted from a sandy or gravelly soil, and still less from one that is stony; but from a stratum that is white and cretaceous, or else impregnated with red earth. If a sandy soil must be employed for the purpose, it should at least be male sand, and no other. The spring is the best season for making bricks, as at midsummer they are very apt to crack. For building, bricks two years old are the only ones that are approved of; and the wrought material of them should be well macerated before they are made.
There are three different kinds of bricks; the Lydian, which is in use with us, a foot-and-a-half in length by a foot in breadth; the tetradoron; and the pentadoron; the word “doron” being used by the ancient Greeks to signify the palm — hence, too, their word “doron” meaning a gift, because it is the hand that gives. — These last two kinds, therefore, are named respectively from their being four and five palms in length, the breadth being the same. The smaller kind is used in Greece for private buildings, the larger for the construction of public edifices. At Pitane, in Asia, and in the cities of Maxilua and Calentum in Farther Spain, there are bricks made, which float in water, when dry; the material being a sort of pumice-earth, extremely good for the purpose when it can be made to unite. The Greeks have always preferred walls of brick, except in those cases where they could find silicious stone for the purposes of building: for walls of this nature will last for ever, if they are only built on the perpendicular. Hence it is, that the Greeks have built their public edifices and the palaces of their kings of brick; the wall at Athens, for example, which faces Mount Hymettus; the Temples of Jupiter and Hercules at Patræ, although the columns and architraves in the interior are of stone; the palace of King Attalus at Tralles; the palace of Crœsus at Sardes, now converted into an asylum for aged persons; and that of King Mausolus at Halicarnassus; edifices, all of them, still in existence.
Muræna and Varro, in their ædileship, had a fine fresco painting, on the plaster of a wall at Lacedæmon, cut away from the bricks, and transported in wooden frames to Rome, for the purpose of adorning the Comitium. Admirable as the work was of itself, it was still more admired after being thus transferred. In Italy also there are walls of brick, at Arretium and Mevania. At Rome, there are no buildings of this description, because a wall only a foot-and-a-half in thickness would not support more than a single story; and by public ordinance it has been enacted that no partition should exceed that thickness; nor, indeed, does the peculiar construction of our party-walls admit of it.
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CHAP. 50. (15.)
SULPHUR, AND THE SEVERAL VARIETIES OF IT: FOURTEEN REMEDIES.
Let thus much be deemed sufficient on the subject of bricks. Among the other kinds of earth, the one of the most singular nature, perhaps, is sulphur, an agent of great power upon other substances. Sulphur is found in the Æolian Islands, between Sicily and Italy, which are volcanic, as already stated. But the finest sulphur of all, is that which comes from the Isle of Melos. It is obtained also in Italy, upon the range of hills in the territories of Neapolis and Campania, known as the Leucogæi: when extracted from the mines there, it is purified by the agency of fire.
There are four kinds of sulphur; the first of which is “live” sulphur, known as “apyron” by the Greeks, and found in solid masses, or in other words, in blocks. This, too, is the only sulphur that is extracted in its native state, the others being found in a state of liquescence, and requiring to be purified by being boiled in oil. This kind is green and transparent, and is the only sulphur that is used for medicinal purposes. A second kind is known as the “glebaceous” sulphur, and is solely employed in the workshops of the fullers. The third kind, also, is only used for a single purpose, that of fumigating wool, a process which contributes very greatly to making the wool white and soft; “egula” is the name given to it. The fourth kind is used in the preparation of matches more particularly.
In addition to these several uses, sulphur is of such remarkable virtue, that if it is thrown upon the fire it will at once detect, by the smell, whether or not a person is subject to epilepsy. Anaxilaüs used to employ this substance by way of pastime: putting sulphur in a cup of wine, with some hot coals beneath, he would hand it round to the guests, the light given by it, while burning, throwing a ghastly paleness like that of death upon the face of each. Its properties are calorific and maturative, in addition to which, it disperses abscesses on the body: hence it is that it is used as an ingredient in plasters and emollient poultices. Applied to the loins and kidneys, with grease, when there are pains in those parts, it is marvellously effectual as a remedy. In combination with turpentine, it removes lichens on the face, and leprosy, the preparation being known as “harpax,” from the celerity with which it acts upon the skin; for which reason it ought to be removed every now and then. Employed as an electuary, it is good for asthma, purulent expectorations, and stings inflicted by scorpions. Live sulphur, mixed with nitre, and then bruised with vinegar and applied, causes morphew to disappear, and destroys nits in the hair; in combination, too, with sandarach and vinegar, it is good for diseases of the eyelids.
Sulphur has its place among our religious ceremonies, being used as a fumigation for purifying houses. Its virtues are also to be perceived in certain hot mineral waters; and there is no substance that ignites more readily, a proof that there is in it a great affinity to fire. Lightning and thunder are attended with a strong smell of sulphur, and the light produced by them is of a sulphureous complexion.
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CHAP. 51.
BITUMEN, AND THE SEVERAL VARIETIES OF IT; TWENTY-SEVEN REMEDIES.
Nearly approaching to the nature of sulphur is that of bitumen, which in some places assumes the form of a slime, and in others that of an earth; a slime, thrown up, as already stated, by a certain lake in Judæa, and an earth, found in the vicinity of Sidon, a maritime town of Syria. In both these states, it admits of being thickened and condensed. There is also a liquid bitumen, that of Zacynthus, for example, and the bitumen that is imported from Babylon; which last kind is also white: the bitumen, too, of Apollonia is liquid. All these kinds, in Greek, have the one general name of “pissasphaltos,” from their strong resemblance to a compound of pitch and bitumen. There is also found an unctuous liquid bitumen, resembling oil, in a spring at Agrigentum, in Sicily, the waters of which are tainted by it. The inhabitants of the spot collect it on the panicles of reeds, to which it very readily adheres, and make use of it for burning in lamps, as a substitute for oil, as also for the cure of itch-scab in beasts of burden.
Some authorities include among the bitumens, naphtha, a substance which we have already mentioned in the Second Book; but the burning properties which it possesses, and its susceptibility of igniting, render it quite unfit for use. Bitumen, to be of good quality, should be extremely brilliant, heavy, and massive; it should also be moderately smooth, it being very much the practice to adulterate it with pitch. Its medi- cinal properties are similar to those of sulphur, it being naturally astringent, dispersive, contractive, and agglutinating: ignited, it drives away serpents by the smell. Babylonian bitumen is very efficacious, it is said, for the cure of cataract and albugo, as also of leprosy, lichens, and pruriginous affections. Bitumen is employed, too, in the form of a liniment, for gout; and every variety of it is useful for making bandolines for eyelashes that are refractory and impede the sight. Applied topically with nitre, it is curative of tooth-ache, and, taken internally, with wine, it alleviates chronic coughs and difficulty of respiration. It is administered in a similar manner for dysentery, and is very good for arresting looseness of the bowels. Taken internally with vinegar, it dissolves and brings away coagulated blood. It modifies pains also in the loins and joints, and, applied with barley-meal, it forms a peculiar kind of plaster, to which it has given its name. It stanc
hes blood also, heals wounds, and unites the sinews when severed. Bitumen is administered for quartan fevers, in doses of one drachma to an equal quantity of hedyosmos, the whole kneaded up with one obolus of myrrh. The smell of burnt bitumen detects a tendency to epilepsy, and, applied to the nostrils with wine and castoreum, it dispels suffocations of the uterus. Employed as a fumigation, it acts as a check upon procidence of the uterus, and, taken internally with wine, it has the effect of an emmenagogue.
Another use that is made of it, is for coating the inside of copper vessels, it rendering them proof against the action of fire. It has been already stated that bitumen was formerly employed for staining copper and coating statues. It has been used, too, as a substitute for lime; the walls of Babylon, for instance, which are cemented with it. In the smithies they are in the habit of varnishing iron and heads of nails with it, and of using it for many other purposes as well.
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CHAP. 52.
ALUMEN, AND THE SEVERAL VARIETIES OF IT; THIRTY-EIGHT REMEDIES.
Not less important, or indeed very dissimilar, are the uses that are made of alumen; by which name is understood a sort of brine which exudes from the earth. Of this, too, there are several kinds. In Cyprus there is a white alumen, and another kind of a darker colour. The difference, however, in their colour is but trifling in reality, though the uses made of them are very dissimilar; the white liquid alumen being employed for dyeing wool of bright colours, and the black, on the other hand, for giving wool a tawny or a sombre tint. Gold, too, is purified by the agency of black alumen. Every kind of alumen is a compound of slime and water, or in other words, is a liquid product exuding from the earth; the concretion of it commencing in winter, and being completed by the action of the summer sun. That portion of it which is the first matured, is the whitest in appearance.
The countries which produce this substance, are Spain, Ægypt, Armenia, Macedonia, Pontus, Africa, and the islands of Sardinia, Melos, Lipara, and Strongyle: the most esteemed, however, is that of Egypt, the next best being the produce of Melos. Of this last kind there are also two varieties, the liquid alumen, and the solid. Liquid alumen, to be good, should be of a limpid, milky, appearance: when rubbed between the fingers it should be free from grit, and productive of a slight sensation of heat. The name given to it is “phorimon.” The mode of detecting whether or not it has been adulterated, is by the application of pomegranate-juice; for if genuine, it will turn black on combining with the juice. The other, or solid alumen, is pale and rough in ap- pearance, and turns black on the application of nut-galls; for which reason it is known by the name of “paraphoron.”
Liquid alumen is naturally astringent, indurative, and corrosive: used in combination with honey, it heals ulcerations of the mouth, pimples, and pruriginous eruptions. The remedy, when thus used, is employed in the bath, the proportions being two parts of honey to one of alumen. It has the effect, also, of checking and dispersing perspiration, and of neutralizing offensive odours of the arm-pits. It is taken too, in the form of pills, for affections of the spleen, and for the purpose of carrying off blood by the urine: incorporated with nitre and melanthium, it is curative of itch-scab.
There is one kind of solid alumen, known to the Greeks as “schiston,” which splits into filaments of a whitish colour; for which reason some have preferred giving it the name of “trichitis.” It is produced from the mineral ore known to us as “chalcitis,” from which copper is also produced, it being a sort of exudation from that mineral, coagulated into the form of scum. This kind of alumen is less desiccative than the others, and is not so useful as a check upon bad humours of the body. Used, however, either in the form of a liniment or of an injection, it is highly beneficial to the ears; as also for ulcerations of the mouth, and for tooth-ache, if retained with the saliva in the mouth. It is employed also as a serviceable ingredient in compositions for the eyes, and for the generative organs in either sex. The mode of preparing it is to roast it in crucibles, until it has quite lost its liquid form.
There is another variety of alumen also, of a less active nature, and known as “strongyle;” which is again subdivided into two kinds; the fungous, which easily dissolves in any liquid, and is looked upon as altogether worthless; and the porous, which is full of small holes like a sponge, and in pieces of a globular form, more nearly approaching white alumen in appearance. It has a certain degree, too, of unctuousness, is free from grit, friable, and not apt to blacken the fingers. This last kind is calcined by itself upon hot coals, unmixed with any other substance, until it is entirely reduced to ashes.
The best kind of all, however, is that called “melinum,” as coming from the Isle of Melos, as already mentioned; none being more effectual for acting as an astringent, staining black, and indurating, and none assuming a closer consistency. It removes granulations of the eye-lids, and, in a calcined state, is still more efficacious for checking defluxions of the eyes: in this last form, too, it is employed for the cure of pruriginous eruptions on the body. Whether taken internally, or employed externally, it arrests discharges of blood; and if it is applied with vinegar to a part from which the hair has been first removed, it will change into a soft down the hair which replaces it. The leading property of every kind of alumen is its remarkable astringency, to which, in fact, it is indebted for its name with the Greeks. It is for this property that the various kinds are, all of them, so remarkably good for the eyes. In combination with grease, they arrest discharges of blood; and they are employed in a similar manner for checking the spread of putrid ulcers, and for removing sores upon the bodies of infants.
Alumen has a desiccative effect upon dropsical eruptions; and, in combination with pomegranate juice, it removes diseases of the ears, malformed nails, indurations resulting from cicatrization, hangnails, and chilblains. Calcined, with vinegar or nut-galls, in equal proportions, it is curative of phagedænic ulcers; and, in combination with extracted juice of cabbage, of leprosy. Used in the proportion of one part of alumen to two of salt, it arrests the progress of serpiginous eruptions; and an infusion of it in water destroys lice and other parasitical insects that infest the hair. Employed in a similar manner, it is good for burns; and, in combination with the serous part of pitch, for furfuraceous eruptions on the body. It is used also as an injection for dysentery, and, employed in the form of a gargle, it braces the uvula and tonsillary glands. For all those maladies which we have men- tioned as being treated with the other kinds of alumen, that imported from Melos, be it understood, is still more efficacious. As to the other uses that are made of it for industrial purposes, such as preparing hides and wool, for example, they have been mentioned already.
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CHAP. 53. (16.)
SAMIAN EARTH: THREE REMEDIES.
In succession to these, we shall now have to speak of various other kinds of earth which are made use of in medicine.
Of Samian earth there are two varieties; one known as “collyrium,” the other by the name of “aster.” To be in perfection, the first kind should be fresh, remarkably smooth, and glutinous to the tongue; the second being of a more solid consistency, and white. They are both prepared for use by being calcined and then rinsed in water, some persons giving the preference to the first. They are both of them useful for discharges of blood from the mouth, and are employed as an ingredient in plasters of a desiccative nature. They are used also in the preparation of ophthalmic compositions.
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CHAP. 54.
THE VARIOUS KINDS OF ERETRIA.
Of eretria, or Eretrian earth, there are also the same number of varieties; one white, and the other of an ashy colour, this last being preferred in medicine. To be good, this earth should be of a soft consistency, and when rubbed upon copper it should leave a violet tint. The virtues of cretria in a medicinal point of view, and the methods of using it, have been already mentioned in our description of the pigments.
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CHAP. 55.
THE METHOD OF WASHING EARTHS FOR MEDICINAL PURPOSES.
All these earths — for we will take the present opportunity of mentioning it — are well washed in water, and then dried in the sun; after which, they are again triturated in water, and left to settle: this done, they are divided into tablets. They are usually boiled in earthen vessels, which are well shaken every now and then.
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CHAP. 56.
CHIAN EARTH; THREE REMEDIES. SELINUSIAN EARTH; THREE REMEDIES. PNIGITIS; NINE REMEDIES. AMPELITIS; FOUR REMEDIES.
Among the medicinal substances, there is the white earth of Chios also, the properties of which are the same as those of Samian earth. It is used more particularly as a cosmetic for the skin of females; the Selinusian earth being also employed for a similar purpose. This last is of a milk-white colour, and melts very rapidly in water: dissolved in milk, it is employed for whitening the plaster coats on walls. Pnigitis is very similar to Eretrian earth, only that it is found in larger masses, and is of a glutinous consistency. Its effects are similar to those produced by Cimolian earth, but are not so energetic.
Ampelitis is an earth which bears a strong resemblance to bitumen. The test of its goodness is its dissolving in oil, like wax, and preserving its black colour when submitted to the action of fire. Its properties are emollient and repercussive; for which reason, it is used in medicinal compositions, those known as “calliblephara,” more particularly, and in preparations for dyeing the hair.
Delphi Complete Works of Pliny the Elder Page 249
