Filings

Examples

• Such an arrangement of wire is known as a helix or solenoid, and is capable of lifting or pulling larger and more numerous filings and even good-sized pieces of iron, such as tacks. Bertha M. Clark. General Science.
• Iron filings scattered over a magnet arrange themselves in definite lines. Bertha M. Clark. General Science.
• A wire carrying current attracts iron filings. Bertha M. Clark. General Science.
• Take a look at those filings, said he. Rupert S. Holland. Historic Inventions.
• If a wire is passed through a card and a strong current is sent through the wire, iron filings will, when sprinkled upon the card, arrange themselves in definite directions (Fig. 227). Bertha M. Clark. General Science.
• Although such a straight current bearing wire attracts iron filings, its power of attraction is very small; but its magnetic strength can be increased by coiling as in Figure 211. Bertha M. Clark. General Science.
• The electric waves cause these filings to cohere, and so vary the resistance to the passage of the current as to give a basis for transformation into a record. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• The coherer _j_ has two metal pole pieces, _j1 j2_, separated by silver and nickel filings. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• The coherence will continue until the filings are mechanically shaken, when they will at once fall apart, as it were, insulation will be established, and the current will be broken. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• A thick cluster of filings will adhere to the wire (Fig. 210), and will continue to cling to it so long as the current flows. Bertha M. Clark. General Science.
• He demonstrated this by placing the filings between metal plugs in a glass tube, and connecting this in circuit with a battery and electric indicator. Rupert S. Holland. Historic Inventions.
• If the current is broken, the filings fall from the wire, and only so long as the current flows through the wire does the wire have power to attract iron filings. Bertha M. Clark. General Science.
• An electric current makes a wire equivalent to a magnet, giving it the power to attract iron filings. Bertha M. Clark. General Science.
• Connect some cells as shown in Figure 200 and close the circuit through a stout heavy copper wire, dipping a portion of the wire into fine iron filings. Bertha M. Clark. General Science.
• The coherer, invented by Branly in 1891, is a glass tube containing metal filings between two circuit terminals. Edward W. Byrn. The Progress of Invention in the Nineteenth Century.
• If we lay such a magnet on a pile of iron filings, it will be found on lifting the magnet that the filings cling to the ends in tufts, but leave it almost bare in the center (Fig. 222). Bertha M. Clark. General Science.
• Filings do not adhere to the sides of the helix, but they cling in clusters to the ends of the coil. Bertha M. Clark. General Science.
• 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. Various. The Wonder Book of Knowledge.
• 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. Various. The Wonder Book of Knowledge.
• We saw in Section 296 that a coiled wire through which current was flowing would attract iron filings at the two ends of the helix. Bertha M. Clark. General Science.
• In 1890 Professor Eduard Branly found that loose metallic filings became good conductors of electricity when there were electric oscillations at hand. Rupert S. Holland. Historic Inventions.

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