AUTOCLAVE  , a strong closed See also:

• VESSEL (O. Fr. vaissel, from a rare Lat. vascellum, dim. of vas, vase, urn)

vessel of See also:

• METAL
• METAL (through Fr. from Lat. metallum, mine, quarry, adapted from Gr. µATaXAov, in the same sense, probably connected with ,ueraAAdv, to search after, explore, µeTa, after, aAAos, other)

metal in which liquids can be heated above their boiling points under pressure . Etymologically the word indicates a self-closing vessel (afirbs, self, and clavis, See also:

• KEY
• KEY (in O. Eng. tang; the ultimate origin of the word is unknown; it appears only in Old Frisian kei of other Teutonic languages; until the end of the 17th century the pronunciation was kay, as in other words in O. Eng. ending in aeg; cf. daeg, day; clang
• KEY (the phraseograms being indicated by hyphens)
• KEY, SIR ASTLEY COOPER (1821-1888)
• KEY, THOMAS HEWITT (1799-1875)

key, or clavus, See also:

• NAIL (O. Eng. naegal, cf. Dutch, Ger., Swed. nagel; the word is also related to Lat. unguis, Gr. ovu, Sans. nakhas)

nail), in which the tightness of the See also:

• JOINTS

joints is maintained by the See also:

• INTERNAL

internal pressure, but this characteristic is frequently wanting in the actual apparatus to which the name is applied . The prototype of the autoclave was the digester of See also:

• DENIS (DIoNysms), SAINT
• DENIS, JOHANN NEPOMUK COSMAS MICHAEL (1729-1800)

Denis See also:

• PAPIN, DENIS (1647-c. 1712)

Papin, invented in 1681, which is still used in cooking, but the appliance finds a much wider range of employment in chemical See also:

• INDUSTRY (Lat. industria, from indu-, a form of the pre, position in, and either stare, to stand, or struere, to pile up)

industry, where it is utilized in various forms in the manufacture of candles, See also:

• COAL

coal-See also:

• TAR

tar See also:

• COLOURS, MILITARY

colours, &c . Frequently an • agitator, passing through a stuffing-See also:

• BOX
• BOX (Gr. irl or, Lat. buxus, box-wood; cf. 2r6Eir, a pyx)

box, is fitted so that thecontents may be stirred, and renewable linings are provided in cases where the substances under treatment exert a corrosive See also:

• ACTION

action on metal .