Filings

例句:

• 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. 伯莎M.克拉克. 科学通论.
• Iron filings scattered over a magnet arrange themselves in definite lines. 伯莎M.克拉克. 科学通论.
• A wire carrying current attracts iron filings. 伯莎M.克拉克. 科学通论.
• Take a look at those filings, said he. 鲁伯特·萨金特·荷兰. 历史性发明.
• 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). 伯莎M.克拉克. 科学通论.
• 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. 伯莎M.克拉克. 科学通论.
• 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. 十九世纪发明进展.
• The coherer _j_ has two metal pole pieces, _j1 j2_, separated by silver and nickel filings. Edward W. Byrn. 十九世纪发明进展.
• 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. 十九世纪发明进展.
• 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. 伯莎M.克拉克. 科学通论.
• 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. 鲁伯特·萨金特·荷兰. 历史性发明.
• 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. 伯莎M.克拉克. 科学通论.
• An electric current makes a wire equivalent to a magnet, giving it the power to attract iron filings. 伯莎M.克拉克. 科学通论.
• 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. 伯莎M.克拉克. 科学通论.
• The coherer, invented by Branly in 1891, is a glass tube containing metal filings between two circuit terminals. Edward W. Byrn. 十九世纪发明进展.
• 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). 伯莎M.克拉克. 科学通论.
• Filings do not adhere to the sides of the helix, but they cling in clusters to the ends of the coil. 伯莎M.克拉克. 科学通论.
• 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. 佚名. 神奇的知识之书.
• 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. 佚名. 神奇的知识之书.
• 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. 伯莎M.克拉克. 科学通论.
• In 1890 Professor Eduard Branly found that loose metallic filings became good conductors of electricity when there were electric oscillations at hand. 鲁伯特·萨金特·荷兰. 历史性发明.

整理:苏西