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is divided into sections of three or four miles, and trains are so run by the guidance of electric signals that no train enters a section or block before the preceding train has left it.

into short sections, as of three or four miles, and trains are so run by the guidance of electric, or combined electric and pneumatic, signals that no train enters a section or block until the preceding train has left it, as in absolute blocking, or that a train may be allowed to follow another into a block as long as…

r. -- Blue vitriol (Chem.), sulphate of copper, a violet blue crystallized salt, used in electric batteries, calico printing, etc. -- Blue water, the open ocean. -- To look blue, to look disheartened or dejected. -- True blue, genuine and thorough; not modified, nor mixed; not spurious; specifically, of uncompromis…

ly containing a core of soft iron which becomes magnetic when the wire is traversed by an electrical current. Bobbin and fly frame, a roving machine. -- Bobbin lace, lace made on a pillow with bobbins; pillow lace.

A key or other device for breaking an electrical circuit.

A device to measure the resistance of a wire or other conductor forming part of an electric circuit.

A bundle of flexible wires or thin plates of metal, used to conduct an electrical current to or from the commutator of a dynamo, electric motor, or similar apparatus.

g power, as of a lamp, or gas flame, reckoned in terms of the light of a standard candle. Electric candle, A modification of the electric arc lamp, in which the carbon rods, instead of being placed end to end, are arranged side by side, and at a distance suitable for the formation of the arc at the tip; - - called also…

on monoxide. (Chem.) See under Carbonic. -- Carbon light (Elec.), an extremely brilliant electric light produced by passing a galvanic current through two carbon points kept constantly with their apexes neary in contact. -- Carbon point (Elec.), a small cylinder or bit of gas carbon moved forward by clockwork so that…

con in combination; carbon silicide. It is made by heating carbon and sand together in an electric furnace. The commercial article is dark-colored and iridescent. It is harder than emery, and is used as an abrasive.

primary circuit of the latter being connected to the source of supply; also, a system of electric traction in which motors so connected are employed. The cascade system is also called tandem, or concatenated, system; the connection a cascade, tandem, or concatenated, connection, or a concatenation; and the control of…

nerve in the region of the cathode or negative electrode, on the passage of a current of electricity through it.

The part of a voltaic battery by which the electric current leaves substances through which it passes, or the surface at which the electric current passes out of the electrolyte; the negative pole; -- opposed to anode. Faraday. Cathode ray (Phys.), a kind of ray generated at the cathode in a vacuum tube, by the electri…

That branch of physics which treats of heat and electricity. R. Park.

hed drawings are made with it. -- Charcoal point, a carbon pencil prepared for use un an electric light apparatus. -- Mineral charcoal, a term applied to silky fibrous layers of charcoal, interlaminated in beds of ordinary bituminous coal; -- known to miners as mother of coal.

intended and fitted to hold or bear; to load; to fill; as, to charge a gun; to charge an electrical machine, etc. Their battering cannon charged to the mouths. Shak.

um or strip of paper moved by clockwork. The action of the stylus or pen is controlled by electricity.

An instrument signaling the correct time to distant points by electricity.

go around; to go a roundabout way. -- Voltaic or Galvanic circuit or circle, a continous electrical communication between the two poles of a battery; an arrangement of voltaic elements or couples with proper conductors, by which a continuous current of electricity is established.

The collector of an electrical machine, usually resembling a comb.