My father died in 1892 and we had not at the time of his death learned of Popoff's microphone-coherer in which steelfilings were mixed with carbon granules.
The receiver consisted of iron filings in which later carbon particles were added.
When we decomposed water a few days since, by the oxydation of iron filings through the assistance of sulphuric acid, in what did the process consist?
Was not this the manner in which the sulphuric acid assisted the iron filings in decomposing water?
Give three coats with a solution of copper filings in aquafortis, and repeatedly brush over with the logwood decoction, until the greenness of the copper is destroyed.
Dissolve copper filings in aquafortis, brush the wood with it, and then go over the work with a hot solution of pearlash (two ounces to a pint of water) till it assumes a perfectly blue colour.
The filings of the Naxian whetstone are said to be refrigerant, repressing the breasts of maidens and the testicles of boys.
The filings of the oilstone being detergent suit with alopecia.
The little organisms probably do not obey these impulses for reasons of pleasure or pain any more than the iron filings obey the attraction of a magnet for such reasons.
A sheet of cardboard is placed above the magnet, and some iron filings are sifted thinly and evenly over the surface: if the cardboard is gently tapped, the filings will arrange themselves in a series of curves, as shown in fig.
If a magnet is dipped into a mass of iron filings and withdrawn, filings cling to certain parts of the stone in moss-like tufts, other parts remaining bare.
By heating magnesium filings with methyl and ethyl iodides A.
It is sufficient to replace it by a few grains of iron filings thrown on the pole covered with a piece of pasteboard or paper.
It appears thus that the advantage of the iron diaphragm over iron filings reduces itself to presenting in a certain volume a much more considerable number of magnetic molecules to the action of the field.
This is the iron filing telephone, which is reversible; for a given magnetic field there is a certain weight of iron filings for maximum intensity.
There were phosphor-bronze filings in the drip lubricators.
They brought out the filings themselves, in a box of gold.
These lines are very prettily shown by the familiar experiment of placing a sheet of paper over a magnet, and then scattering iron filings on the surface of the paper.
A certain resemblance has been seen between the form of these seeming fibres and that of the lines in which iron filings arrange themselves when sprinkled on paper over a magnet.
It will be noticed that the filings arrange themselves along a series of curved lines, diverging in every direction from each pole, but always passing from one pole to the other.
Scattered about it were some filings which shone as the light from my lantern fell upon them, but which were so fine as to call for a magnifying-glass to make them out.
I remembered the filings I had gathered up from the small stand by the window, filings which had glittered and which must have been of gold.
In another moment I came upon the minute filings I had before observed scattered over a small stand.
Moreover, the single pole is pretty evenly distributed over the whole surface, so that if iron filings be sprinkled on the bar they will be attracted at all points and completely cover it.
Both will have a tendency to repel each other, and the filings will stand on the magnet as in the figure.
Then he weighed out from his mortar a pound or so of crushed ore, added iron filings to it, set it in a melting-pot in the furnace, and began with the bellows again.
During the building of the furnaces, filings and such small matters had been disdained, and for weeks had accumulated uncollected.
The wave falls on conducting material and, the spark gap being replaced by a coherer, the metallic filings magnetically cling together, closing the relay circuit, so that a signal is made.
On breaking the current, a slight tap on the coherer or other means breaks the cohesion of the filings and the relay circuit is broken.
There is a barrel of filings the agent told me to sell for junk.
The presumption was that some frugal machinist had saved his bench filings until he had a barrel full and sold it as junk.
Ben," he began one night, laughing, "did you send your friend in New York another sample of those steel filings on which we are paying storage?
Steel filings were not soluble and would not blacken my finger.
Mechanically I did the same, and wondered why filings were packed in that kind of a barrel.
You mean that old barrel of junk--those filingsyou made me pay three-fifty for a half interest in your foolishness?
It draws all things to its magnetic center as the magnetic core of a steel magnet draws filings of iron and other metals to its magnetic surface, and they cluster there in the same spherical form.
The filings of iron and steel may be sifted through sieves.
When a straight bar magnet is held under a piece of card board upon which iron filingsare sprinkled, the filings will arrange themselves in curved lines radiating from the poles.
If a bar magnet be plunged into iron filings and then lifted, as illustrated in the figure, a mass of filings will cling to the ends of the magnet but not to the middle.
This can be represented graphically by placing a piece of cardboard over the magnet and sprinkling iron filings on the paper, gently tapping at the same time.
If iron filings be sprinkled on the cardboard and a current passed through the solenoid, the character of the field is indicated.
If a horse shoe magnet be held at right angles to the plane of the card board, the filings will arrange themselves in curved lines, as shown in fig.
Coarse steel filings are placed inside a small glass tube and the contents magnetized.
If iron filings be sprinkled over the card while the current is passing, they will arrange themselves in circles around the wire, thus indicating the form of the magnetic field surrounding the conductor.
Bearings tightened and steel filings in the graphite.
Some one's put ironfilings in the graphite," announced Jerry, rubbing the stuff between his fingers.
Strings or lines of filingspass from one pole of the magnet to the other.
The area covered by the filings is the center of the magnetic field.
To remember this, you might compare the magnetic lines of force that arrange the iron filings to the contour strips in a farmer's field.
Water was then poured into the vessel so as just to cover the bottles, and filings of iron were thrown in occasionally to heighten the magnetic effect.
Having been applied to by a patient afflicted with hernia, he directed the man to swallow a small magnet reduced to powder, while he applied, at the same time, to the external swelling a poultice, made of filings of iron.
Tapping the tube made the metal filings break apart again, in which condition they do not allow the current of the cell to pass in sufficient quantity to move the needle.
The spark coil sent electric waves out in every direction, and those which hit the metal filings made them cohere together.
One boy may file this silver ten-cent piece and another may file this nickel five-cent piece, each gathering the filings upon a piece of paper.
This tube is called a coherer, because the filingsin it cohere together.
