noun

definition

Anything that mutes or deadens sound.

definition

A warm piece of clothing for the hands.

definition

A boxing glove.

definition

A kiln or furnace, often electric, with no direct flames (a muffle furnace)

definition

The bare end of the nose between the nostrils, especially in ruminants.

definition

A machine with two pulleys to hoist load by spinning wheels, polyspast, block and tackle.

verb

definition

To wrap (a person, face etc.) in fabric or another covering, for warmth or protection; often with up.

definition

To wrap up or cover (a source of noise) in order to deaden the sound.

example

to muffle the strings of a drum, or that part of an oar which rests in the rowlock

definition

To mute or deaden (a sound etc.).

definition

To speak indistinctly, or without clear articulation.

definition

To prevent seeing, or hearing, or speaking, by wraps bound about the head; to blindfold; to deafen.

Examples of muffle in a Sentence

Muffle furnaces are suitable for fine ores which are liable to decrepitate or sinter.

These burners, or modifications of them, have also been applied to muffle furnaces, which are convenient when only a few assays have to be made - the furnace being a mere clay shell and soon brought to a working temperature; but the fuel is too expensive to allow of their being used habitually or on a large scale.

The precipitate is collected in a filter-press, and then roasted in muffle furnaces with nitre, borax and sodium carbonate.

The process is effected either in heaps, stalls, shaft furnaces, reverberatory furnaces or muffle furnaces.

The dry method consists in an oxidizing roasting of the ores, and a subsequent chloridizing roasting with either common salt or Abraumsalz in reverberatory or muffle furnaces.

In modern practice degreased bones (see Gelatin), or bone-ash which has lost its virtue as a filtering medium, &c., or a mineral phosphate is treated with sufficient sulphuric acid to precipitate all the calcium, the calcium sulphate filtered off, and the filtrate concentrated, mixed with charcoal, coke or sawdust and dried in a muffle furnace.

They commonly take the form of a truncated cone, the broad end springing from the muffle Figure 4a.

For instance, the Tennessee Spirit Mike is said to muffle human conversation and ambient noises while zeroing in on spirit voices.

If hot air is introduced into the kiln, the additional heat developed by the oxidation of the zinc and the sulphur is sufficient to keep up a part of the reaction; but for the complete expulsion of the sulphur an externally-fired muffle through which the ore is passed is found to be essential.

These do not hunt in packs, but will sometimes singly attack a bullock; they and the wolves make havoc among sheep. A favourite feat of the boldest of the young men of southern Afghanistan is to enter the hyena's den, single-handed, muffle and tie him.

It is not easy to keep the muffles permanently tight, and as soon as any leakages occur, either hydrochloric acid must escape into the fire-flue, or some fire-gases must enter into the muffle.

The door of the muffle is then opened and the current of air which is drawn over the scorifier rapidly oxidizes the lead, while the melted litharge gradually closes over the metal.

Types of muffle furnaces are figured in the article Annealing, Hardening And Tempering.

They should also purchase floor mats to muffle the sound of weights being dropped.

Metallurgical furnaces of the first class are termed crucible, muffle or retort furnaces, and of the second shaft and reverberatory furnaces.

Chaplet has patented a muffle or tube furnace, similar in principle, for use on a larger scale, with a number of electrodes placed above and below the muffle-tube.

It is, therefore, decidedly preferable to employ " muffle-furnaces " in which the heating is performed from without, the fire-gases passing first over the arch and then under the bottom of the muffle.

In the .scorification method the ore is mixed in the scorifier (a shallow dish of burned clay) with from ten to twenty times its weight of granulated metallic lead (test lead) and a little borax glass, and heated in a muffle, the front of which is at first closed.

The scorifier is taken from the muffle in a pair of tongs and the contents poured into a mould, the lead forming a button in the bottom while the slag floats on top. When cold, the contents of the mould are taken out and the lead button hammered into the form of a cube, the slag, which is glassy and brittle, separating readily from the metal, which is then ready for cupellation.

In consequence the fire-gases, when arriving there by the chimney shaft (a), have already a good upward draught, and when circulatung round the muffle are at a lower pressure than the gases within the muffle, so that in case of any cracks being formed, no hydrochloric acid escapes into the fire-flues, but vice versa.

These are known as muffle or chamber furnaces; and by supposing the crucibles or retorts to represent similar chambers of only temporary duration, the ordinary pot melting air furnaces, and those for the reduction of zinc ores or the manufacture of coal gas, may be included in the same category.

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