Charge a large jar, and insulate it; then connect two or more sharp-pointed wires or needles, with the knob of the jar, and connect the outside coating of the jar with the table.
This coating is no inconvenience in the forging, as its fluidity causes it to escape immediately under the action of the hammer.
In accomplishing this, the plate is moderately heated, and covered with a thin coating of white wax.
To prevent the penetration of fluids, and to improve the appearance of the ware, a superficial vitreous coating is necessary.
The coating of gold on the silver wire employed in this way, does not exceed the millionth part of an inch in thickness.
The mould is then covered on the inside with a coating of clay as thick as the bronze is intended to be, and the several pieces are afterwards put together, or closed.
But tin is most extensively applied as a coating to other metals, stronger than itself, and more subject to oxydation.
An attempt has been made to obviate this difficulty, by lining the vessels with a thin coating of tin.
The metal for small articles is dipped from the hearth or crucible of the furnace with iron ladles defended on every side with a thin coating of clay mortar, and poured thence into the moulds.
When withdrawn, they are found to have acquired a bright coatingof the melted metal.
This result is measurably prevented by immersing the iron in sand and common salt, which, uniting, form a vitreous coating for its protection.
To perform it, the plate is first covered with a thin coating of some resinous substance, upon which the acid employed can have no action.
The outline thus sketched is turned down upon the coating of white wax, and the whole is subjected to the action of a rolling-press; or it is kept for a while under heavy weights.
The interstices were filled up with clay and moss; and coating the whole over with a mixture of tar and lime-water, we obtained a firm balcony, and a capital roof impervious to the severest fall of rain.
The coating they thus obtained, was not very thick; but, by repeating the operation several times, they at length assumed very fair proportions, and became real sturdy candles.
Bunches of stalactites hang from the roof, and the floor is strewn with bones, covered with a thick coating of lime formation.
The stalagmites are white as snow, and some of them sparkle with an external coating like hoar-frost.
The gutta percha which was employed for the coating of the conducting strand, was prepared with the utmost possible care.
It was then surrounded with a first coating of the purest gutta percha, which being pressed around it while in a plastic state by means of a very accurate die, formed a first continuous tube along the whole conductor.
The coating of gutta percha was made unusually thick, for the sake of diminishing the influence of induction, and in order that the insulation might be rendered as perfect as possible.
Greenwich time, 9-1/2 miles of Cable had been picked up from the sea, and the thin greyish coating of mud which dropped from it showed that the bed of the Atlantic here was of a soft ooze.
To prove the efficacy of the proceeding, a great number of holes were made near together in the first coating of a fragment of the wire, and the second coat was then applied in the usual way.
They entered the die naked bright copper wire, and issued from it thick, dull-looking cords, a complete coating of gutta percha having been attached to them as they traversed the die.
The strand and its triple coating of gutta percha were together designated "the core.
The whole conductor next received a coating of Chatterton's Compound outside of it; this, when the core was completed, quickly solidified, and became almost as hard as the remainder of the subsequent insulation.
This coating must be so thick that, when the other six wires forming the strand were laid spirally and tightly round it, every interstice was completely filled up and all air excluded.
If the external coating had not been injured, no faults could have occurred, and if there had been no faults, the Cable would have been laid with the utmost ease.
Each of these wires was boiled three several times in linseed oil, giving it an oleaginous coating of considerable thickness and great adhesive power.
The oleaginous coating of the wires, together with the small triangular spaces between them, would seem to reduce the destructive power of the vibrations to zero.
The balloon is made of long strips of silk, sewn together, and rendered air-tight by means of a coating of caoutchouc.
The story-like introduction to many sections is not a sugar coating to make the child swallow a bitter pill.
Old lacquer and rust should be removed by scraping, as far as can be conveniently done before a new coating is applied.
To obtain these thicknesses, the operation of coating should be performed twice; then pour into the shell enough of the composition to produce the desired thickness at the bottom, the shell standing on its base.
In this, instead of coating the wire with some fibrous material such as silk or cotton, the wire is heated and run through a bath of fluid insulating material or liquid enamel, which adheres to the wire in a very thin coating.
For this purpose the wire is usually covered with a coating of some insulating material.
One day Cellini had found a ruby which he believed to be set dishonestly, that is, a very pale stone with a thick coating of dragon's blood smeared on its back.
Another form of enamel was used to colour gold work in relief, with a permanent coating of transparent colour.
When a barn is to be fired, be sure that it is carefully prepared beforehand, with a coating of tar and long wisps of tarred paper, and the boys cannot be too cautious not to get on fire themselves.
It, too, will blaze all the fiercer if you apply a coating of pitch.
A water-jacket signifies a double coating of metal plates with a space between, which is filled with water (see Fig.
A magnet, whirled outside the bell-glass, draws round the iron armature on the pivoted table, and consequently revolves the record, on the surface of which a very thin coating of gold is deposited.
Electroplating is the art of coatingmetals with metals by means of electricity.
Where nickel or silver has to be deposited on iron, the article is often given a preliminary coating of copper, as iron does not make a good junction with either of the first two metals, but has an affinity for copper.
The coating of wool from one sheep is called a fleece.
Cotton fibers have a kind of waxy coating which throws off the water.
Then, wrapping it about with a thick layer of long rye straw, and tucking it up snug and warm, the mound was covered with a thin coating of earth, a flat stone on the top holding down the straw.
As winter set in, another coating of earth was put upon it, with perhaps an overcoat of coarse dry stable manure, and the precious pile was left in silence and darkness till spring.
When she arrived in her bower with the dust on her body soaked by the rain into a coating of mud, she must have been a sight!
Tar coating is, however, not allowed in New York, because it conceals the sand holes and other flaws in the pipes.
This green variety is often seen as a spongy coating to the surface of stagnant pools, which goes by the name of "frog spawn" or "pond scum.
Care must be taken not to touch the film side of the plate during development or fixing, as the gelatine coating becomes very soft and will show the slightest scratch or abrasion.
The "fixing" in hypo will take probably five minutes and should be continued until the white coating is thoroughly dissolved.
It may be made partially waterproof by a coatingof paraffine which has been previously dissolved in turpentine.
The old lane about 1300 feet ahead of the Fram has opened again--a large rift, with a coating of ice and rime.
The coatingof steel produced on the article by this process is hardened by cooling the article suddenly in water.
If it is necessary to recolour any part let the first coating dry before beginning.
The bayberries, which seem to be nothing but tiny stones covered with a coating of wax, do not decay quickly, but shrivel up into small gray pellets that will keep, it is said, a year or more.
This will give the inside a coating of wax which will keep the paper from absorbing the bayberry wax.
Sometimes a coatingof slip, well worked in with the brush will give a good surface.
In some cases wooden tablets of this kind were used without a coating of wax, but had simply a smooth surface to receive writing with ink and a reed pen.
Though the coating of wax has nearly all perished, the sharp stilus has marked through on to the wood behind the wax, so that the writing is still legible.
He was thus enabled to make the improvement in the electrical machine of coating its rubber with an amalgam rich in mercury, which greatly enhanced its powers.
A triple coating of gutta percha, to keep the sea from sucking out the electricity, and a thick coating of iron wire, to sink the cable to the bottom and give it strength, were added to the copper rope, and then the cable was complete.
Outside this was a coating of hemp or jute yarn, saturated with a preservative composition; while the sheath consisted of ten iron wires, each previously covered with five tarred Manilla yarns.
His first scientific discovery was the detection of siliceous earth in the outer coating of reeds and grasses.
