Talking Machines.—The talking machine, known by several names, including the phonograph, was originally invented by Edison. Unscientifically speaking, it consists of a disc similar to that used in the telephone, with a needle or point attached to the center of the underside of it. This needle or point fits into circular or cylindrical grooves, which are covered with tin foil or other malleable substance.
The vibrations of the voice or of music, which reach the disc, cause this needle or point to rise or fall, producing impressions upon the tin foil or other substance. After the record has been made, duplicates are produced in a substance largely made of rubber, which is placed on a rotary disc or cylinder that is turned automatically, the needle or point attached to the disc working into the grooves and rising with or following the impressions, which cause the plate or disc to vibrate. The process is wholly mechanical, and electricity is not used.
Tariff.—This word, meaning a schedule of duties on merchandise, imported or exported, is said to come from Tarifa, a town in Southern Spain, on the Mediterranean Sea, where duties were once levied by the Moors on all ships passing in or out of the Straits of Gibraltar.
Telegraph.—The conception of the telegraph came to Professor Morse, in 1832, while he was making a voyage from Europe to America, and he at once began his experiments, which resulted in what may be considered one of the two greatest inventions or discoveries. After waiting about eight years, Congress reluctantly appropriated a sum sufficient to build a telegraph line between Washington and Baltimore. The original conception of telegraphy belongs wholly to Professor Morse, but since its invention other scientists have invented improvements, including an apparatus which allows the sending of two messages each way, or four messages in all, over the same wire at the same time. The telegraphic code or alphabet, originally invented by Morse, remains practically intact. It consists of dots and dashes, and may be learned in a few hours, although expertness requires a year or more of practice. Unscientifically speaking, the telegraphic apparatus is extremely simple: it consists primarily of a piece of soft iron around which is wound several strands of insulated wire. During the time that electricity is passing through this wire, the soft iron becomes a magnet, but returns to its nonmagnetic character when electricity is not passing around it. A battery is used for the generating of electricity. The operator turns electricity into the wire by pressing a key. When the key is down, the electricity passes around the piece of soft iron and makes of it a magnet, which will draw iron or steel to it, the same as does any ordinary permanent magnet. Just above the end of the soft iron is placed a piece of metal, and as the key is pressed letting in the electricity, the iron (then a magnet) draws this metal to it, producing a slight sound or click. This piece of iron is held by a spring, and springs back into place when electricity is let out of the insulated wire surrounding the soft iron. If a message is to be sent a long distance, a relay is used so as to turn into the wire additional currents of electricity, because electricity loses some of its strength if carried over a very long wire, and a relay adds new or fresh currents from separate batteries. In this way, a message can be sent continuously for several thousand miles, which would be impossible without the use of relays. The process of sending several messages at the same time over the same wire is somewhat complicated. The result is obtained by using currents of electricity of different intensity, the currents not interfering with each other. The ocean cables are described under another heading.
Telephone.—The telephone is supposed to have been invented by Professor A. G. Bell, in 1875, but scientists recognize the probable invention of it, largely in theory, by the eminent scientists Dolbear, Gray, Edison, and possibly others. It is exceedingly difficult to describe, other than scientifically, the working of the telephone; and it cannot be done perfectly until electricity is fully understood. We know the result, but are not able to locate all of the causes. The original telephone consisted of a bar of magnetized steel of about the circumference of an ordinary poker, a few inches in length, around which was wound insulated wire. At one end of the magnet, and close to it, was placed a metallic disc about twice the circumference of a silver dollar and of the thickness of thin tin. Originally the same instrument was used both for sending and for receiving. Any sound, including the human voice, brought in direct contact with the disc, caused it to vibrate, and for some unknown reason these vibrations were transmitted through the magnet, and by the wires carried to another similar instrument. The sounds and voice were carried a short distance without the use of a battery, and the early telephones had ground circuits; that is, there was only one wire between the stations, the other wire being grounded by being attached to gas or other pipes, the electricity making half the circuit through the earth. Later on a battery was used, which increased the sending distances, but the ground wire remained for some time. The present telephone consists of the original telephone as a receiver, but with a transmitter into which the sender speaks his words. The mechanism of the transmitter is complicated and cannot be described except scientifically. Its use allows one to talk long distances, even to the extent of 2,000 miles. Non-technically speaking, then, the telephone consists of a magnet, insulated wire, and a disc, the vibration upon the disc being transmitted over the wire from the sending to the receiving station, electricity being used for conveying the vibrations or sound.
Eight billion, four hundred thousand and twenty-seven million conversations were held in this country last year over the wires of the American Telephone and Telegraph Co., according to its annual report. The daily average was 26,310,000. The company now has telephone stations in 70,000 cities, towns, and hamlets, which is 5,000 more than the number of postoffices in the country, and 10,000 more than the number of railroad stations. Altogether there were 7,456,074 telephone stations of the company at the end of 1912.
Ten Great Religions.—James Freeman Clarke, in his book "Ten Great Religions," gives the following as the ten most important faiths of ancient and modern times:
- Confucianism.
- Brahmanism.
- Buddhism.
- Zoroastrianism.
- Religion of Egypt.
- Religion of Greece and Rome.
- Teutonic and Scandinavian Religion.
- Judaism.
- Christianity.
- Islâm.