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

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273

Waterston’s Encyclopædia of Commerce.

274

Some also may with equal propriety have called it sandyx; and I am of opinion that under this name we are to understand our madder, at least in a passage of Virgil, Eclogue iv. 45, where he says, “Sponte sua sandyx pascentes vestiet agnos.” As the wool of the sheep became red by eating the madder which grew in the fields, it could be immediately manufactured, without dyeing it artificially. We manufacture the wool of our brown sheep in its natural colour, and this was done also by the ancients. Cloths of this kind were the panni nativi coloris, as they are called by Pliny, xxxvi. 7; and the words of Martial, xiv. 133, allude to a dress made of such cloth:

I shall here take occasion to remark, that the word lutum, in the line preceding the above passage of Virgil, must be translated yellow-weed, and not woad. The former, Reseda luteola, dyes yellow; but the latter, Isatis, dyes blue. Lutum, however, in Cæsar De bello Gallico, v. 14, seems to have been woad: “Omnes se Britanni luteo inficiunt, quod et cæruleum efficit colorem.” It appears, therefore, that both names were liable to be confounded in the Latin, as they are in the German; unless Davis be right, who, instead of luteo, reads vitro. That sandyx, in Virgil, signifies a plant rather than a mineral, is to me far more probable. The author speaks of plants which the sheep ate while feeding (pascentes); and both the above-mentioned dye-plants, yellow-weed and woad, grow wild in Italy. The opinion of Pliny, who understood the passage so, is not to be despised; and therefore the poetical account, that the pasture dyed the wool, is not altogether without foundation; especially as not only the roots, but also the leaves of madder, communicate a colour to the solid parts of animal bodies. I will however allow that most people readily fall into the error of being led away by imagination; and often suppose that they find in passages of ancient authors more than others can discover, or perhaps even than they contain.

275

Lib. xxiv. 9, p. 341.

276

The first account of this circumstance may be found in the Philosophical Transactions, vol. xxxix. n. 442, p. 287; n. 443, p. 299. Among the principal experiments made on this subject, are those of the Italian Matth. Bazanus, in Comment. Bononiens. and of J. H. Benj. Böhmer, in a dissertation entitled Radicis Rubiæ tinctorum effectus in Corpore Animali, Lips. 1751. Other works and observations relative to this singularity are mentioned in Haller’s Elementa Physiologiæ, v. p. 327.

277

That the Rubia colours the milk has been denied by many, who are mentioned in Haller’s Physiol. viii. p. 328. Young, in his Treatise De Lacte, says only that it has no effect on carnivorous animals. Being once engaged in making experiments on the madder dye, I gave the plant to a cow for several days, and I found that the milk became reddish and streaked with veins which were of a darker colour than the other parts. That well-known farmer, Gugenmus, gave the madder-plant, formed into hay, to his cows, who ate it readily. Their milk was somewhat reddish, and the butter and cheese acquired by these means in winter an agreeable colour. Perhaps the effects do not take place when the animals get other food at the same time. Or may not the state of their health occasion some difference? This much is certain, that Chelidonium (swallow-wort) makes the milk of cows that are weak appear bloody, while the same effect does not follow, or at least immediately, in those that are strong. Ruellius, De Natura Stirpium, Basiliæ, 1543, fol. p. 572, says of the Rubia, “Folia capillum tingunt.” If he meant that the hair became red by eating the leaves, he committed a mistake.

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Dissertatio de Vita Nuptiisque Plantarum. Lipsiæ, 1741, p. 11.

279

I do not know that any one ever remarked human bones to have been dyed by madder, though the proposal for using the roots of it against the rachitis might have given occasion to make observations on that subject. See G. L. Hansen, Diss. de Rachitide. Gottingæ, 1762, p. 36. Professor Arnemann, who has a very numerous and valuable collection of skeletons, and who carefully examined many of the like kind during his travels, assured me that he never saw any bones that had been dyed by madder in the human body.

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On Vegetable Substances, by the Society for the Diffusion of Useful Knowledge.

281

Essais, i. 54.

282

The juggler mentioned in Xenophon requested the gods to allow him to remain only in places where there was much money and abundance of simpletons.

283

Le Siècle de Louis XIV. Berlin, 1751, 12mo, i. p. 44. This horse was seen in the above-mentioned year by Casaubon, to whom the owner, an Englishman, discovered the whole art by which he had been trained. See Casauboniana, p. 56. We are assured by Jablonski, in his Lexicon der Künste und Wissenschaften, p. 547, that he was condemned to the flames at Lisbon. In the year 1739, a juggler in Poland was tortured till he confessed that he was a sorcerer, and without further proof he was hanged. The whole account of this circumstance may be found in the Schlesischen gelehrten Neuigkeiten for the year 1739.

284

See Luciani Opera, ed. Bipont. v. pp. 388, 407.

285

Florus, iii. 19, 4.

286

Directions for performing this trick may be found in various works, such as Joh. Wallbergen’s Zauberkünste, Stuttgard, 1754, 8vo, and Natürliches Zauberbuch, Nurnberg, 1740, 8vo.

287

See Bayle’s Diction. i. p. 450, art. Barchochebas.

288

Philostorgii Hist. Eccles. vii. 7, p. 93.

289

Vita Alexandri, p. 687.

290

Galen, l. c.

291

Ovid. Met. lib. ix. 160.

292

Instances may be found collected in Huetii Alnetanæ Quæstion. lib. ii. and in Bayle’s Dictionary, art. Egnatia.

293

Journal des Sçavans, 1667, pp. 54, 222; and 1680, p. 292. Deslandes, Mémoires de Physique, ii. and Bremenscher Magazin, i. p. 665. See also Busbequii Omnia, Basil, 1740, 8vo, p. 314.

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[Deception might have been easily practised in this case. Fusible metal, as suggested by Sir David Brewster, Nat. Magic, p. 301, which consists of mercury, tin and bismuth, and which melts at a low temperature, might easily have been substituted in place of lead; and fluids, the boiling-point of which is lower than water, might easily have been substituted for that liquid.

A solution of spermaceti in sulphuric æther, tinged with alkanet root, which solidifies at 50° F., and melts and boils with the heat of the hand, is supposed to be the substance which is used at Naples, when the dried blood of St. Januarius melts spontaneously and boils over the vessel which contains it.

The experiments of M. Tillet, Dr. Fordyce and Sir Charles Blagden, will show the great heat which may be endured by the human body. Some of these gentlemen remained in a room where the heat was one or two degrees above 260° F. for eight minutes; a beaf-steak was cooked in the same atmosphere, and was overdone in thirty-three minutes; when the steak was blown upon with a pair of bellows, it was found to be pretty well done in thirteen minutes. But Sir F. Chantry exposed himself to a still greater heat in the furnace used for drying his moulds. When raised to its highest temperature, the thermometer indicated 350° F., and the iron floor was red-hot. The workmen often entered it at 340°. On one occasion Sir F., accompanied by five or six of his friends, entered the furnace, and after remaining two minutes, they brought out a thermometer which indicated 320°. Some of the party experienced sharp pains in the tips of their ears, and in the septum of the nose, whilst others felt a pain in their eyes. – Brewster, l. c.]

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[The peculiar property of minerals and various salts, as alum, in forming and protecting articles of dress, &c. from the effects of fire, has long been known. But the art of practically applying it, is due to the ingenuity of the Chevalier Aldini of Milan. His dress consisted of a strong cloth covering which had been steeped in a solution of alum, for the body, arms and legs; whilst the head-dress was a large cap enveloping the whole head down to the neck, with holes for СКАЧАТЬ