A History of Inventions, Discoveries, and Origins, Volume II (of 2). Johann Beckmann. Читать онлайн. Newlib. NEWLIB.NET

Автор: Johann Beckmann
Издательство: Public Domain
Серия:
Жанр произведения: Зарубежная классика
Год издания: 0
isbn:
Скачать книгу
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.]

295

[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 the nose, eyes and mouth; the covering for the feet was composed of asbestos, or amianthus cloth. The stockings and cap were single, but the gloves were double, to enable the fireman to take burning or red-hot bodies into his hands. A metallic dress was added to this, consisting of a cap, with a mask, leaving a space between it and the asbestos cap; a cuirass; a piece of armour for the trunk and thighs; a pair of boots of double wire-gauze; and an oval shield five feet long by two and a half wide, made by stretching the wire-gauze over a slender frame of iron. All these pieces were made of wire-gauze.

It was found, that when armed with this apparatus, a man could walk upon hot iron, in the midst of high flames, keep his head over a pan of flaming fire, &c. for several minutes, and this in some cases where the heat was so intense that bystanders were obliged to stand at the distance of eight or ten yards. This was remarkably shown in 1829, in the yard of the barracks of St. Jervais. Two towers were erected, two stories high, and were surrounded with heaps of inflamed faggots and straw. One of the firemen, with a child on his back, in a wicker basket covered with metallic gauze, and having a cap of amiantheric cloth, rushed into a narrow place, where the flames were raging eight yards high. The violence of the fire was so great that he could not be seen, while a thick black smoke spread around, throwing out a heat which was insupportable to the spectators. The man remained so long invisible that serious doubts were entertained of his safety. He at length, however, issued from the fiery gulf uninjured.]

296

The same thing was performed by Schreber in 1760.

297

Plin. vii. 11. – Virg. Æn. xi. – Silius Ital. v. – Strabo, v.

298

Strabo, xii.

299

In his work De Mirabilibus Mundi, at the end of his book De Secretis Mulierum, Amstelod. 1702, 12mo, p. 100.

300

Antigone, 270.

301

Animad. in Athen. lib. i. 15.

302

De Theatro, lib. i. 40, in Grævii Thes. Ant. Rom. ix.

303

Lib. iii. epist. 20. – Seneca, Epist. 45. Compare Suidas, Pollux, and Athenæi Deipn. 4. It is probable that Quintilian alludes to this art in his Institut. x. 7, 11.

304

Plin. vii. 20, p. 385. – Martial. v. 12. – Suidas, speaking of Theogenes Thasius. – Haller, Elem. Physiol. iv. p. 486.

305

Vopiscus, Vita Firmi. See the figure in Desaguliers, tab. xix. fig. 5. He describes the position thus: – The pretended Samson puts his shoulders (not his head, as he used to give out) upon one chair, and his heels upon another (the chairs being made fast), and supports one or two men standing on his belly, raising them up and down as he breathes, making with his backbone, thighs and legs, an arch whose abutments are the chairs.

306

A course of Experimental Philosophy. Lond. 1745, 4to, i. p. 266. [A popular account of these extraordinary feats, with illustrations and explanations of the principles on which they depend, is given by Sir David Brewster in his interesting volume on Natural Magic, p. 246.]

307

Versuche und Abhandl. der Naturforsch. Geselsch. in Danzig.

308

A great many of these passages of the ancients have been collected by Bulenger, in his work De Theatro, i. cap. 41. See also Des Camps in a dissertation contained in Recherches Curieuses d’Antiquité, par Spon. A Lyon 1683. – Mercurialis De Arte Gymnast. and Fabricii Biblioth. Antiq. p. 995.

309

An epigram, ascribed to Petronius, at page 542 of the edition of Hadrianides, belongs to this subject.

310

Muratori Antiquit. Ital. Med. Ævi, ii. p. 846.

311

Von Stetten, Kunstgeschichte von Augsburg, ii. p. 177.

312

Claudian. de Mallii Consul. 320. In Cilano’s Römischen Alterthümer, ii. fig. 8, there is a representation like what I have often seen exhibited. But the most dangerous and the most curious is that of which an engraving is given in Splendor Urbis Venetiarum, to be found in Grævii Thesaurus Antiquit. Italiæ, v. 3. p. 374.

313

Sat. xiv. 265.

314

Lib. v. 433.

315

Symposium, p. 655, edition of Basle, 1555. fol. Εἰσεφέρετο τῇ ὀρχηστρίδι τροχὸς τῶν κεραμεικῶν ἐφ’ οὗ ἔμελλε θαυμασιουργήσειν. In the old edition of J. Ribittus, this passage is thus translated: “Allata est saltatrici orbis saltatorius, in quo admiranda erat editura.” The first question that arises is, what was τροχὸς τῶν κεραμεικῶν. The last word alluded to a place at Athens where wrestling was exhibited every year; and on that account Aristophanes uses the expression πληγαὶ κεραμεικαί. This however affords no explanation. Bulenger, who quotes the same passage, translates it in the following manner: “Illata est saltatrici figularis rota, per quam se trajiceret, et miracula patraret.” He means here therefore a potter’s wheel, the invention of Anacharsis, but that was always called κεραμικὸς τροχὸς, and not τροχὸς τῶν κεραμεικῶν. But even allowing that a potter’s wheel is meant, it is wrong to add per quam se trajiceret; for the potter’s wheel is not like a hoop, but like a plate or dish; and when turned round revolves not vertically, but horizontally. Besides, how the performer could write or read on a wheel that she jumped through, he has not thought proper to explain. “Scribere et legere in rota dum versatur, mirabile quiddam est.” If a potter’s wheel be meant, I consider it as certainly possible for a person to stand upon it whilst it revolves with the greatest velocity, and even to read or write; but it would be necessary to lift up the legs, in turn, with the utmost quickness.

316

Nicephorus Gregor. viii. 10. p. 215. This company of rope-dancers came from Egypt. They travelled through the greater part of Asia, and all Europe, as far as the extremity of Spain. At Constantinople they extended the ropes, on which they first exhibited their art, between the masts of ships. One is almost induced to believe that stupid superstition did not then prevail so much in Europe as at the beginning of the last century. The historian says that the company at first consisted of forty persons; but that the half of them were cast away on their passage to Constantinople. He does not, however, tell us that they or their horses were anywhere burnt as conjurors, or possessed with the devil.

317

See the German translation of his Travels, ii. p. 238.

318

Journal du Règne de Henri III. p. 57. – Recueil de Pièces servant à l’Hist. de Henri III. Cologne, 1666, 12mo.

319

Epistolarum Selectarum Centuria. Antverpiæ, 1605, 4to, i. epist. 50. p. 59. – Plin. viii. 1 and 3. – Seneca, epist. 86. – Suetonii