These 9 listings are so strange that each appears in only one of the 7 encyclopedias we compared. They include such classics as Tiverton, Tlaxcala, Tlemcen.
a town in N. Devon, England; 18 miles N. of Exeter; on the slope of a hill above the confluence of the Exe and Loman, from whose two fords it derives its Old English name of Twy-ford-ton. The chief of its three churches, St. Peter's (136 feet long by 82 feet wide, with a tower 110 feet high), dates from 1073, but was partly rebuilt in the 16th and was thoroughly restored
Only in Collier's New Encyclopedia
the smallest State of Mexico; on the plateau of Anahuac; nearly surrounded by Puebla, and touching Mexico State on the W.; area 1,534 square miles. Pop. 1919, 192,000 . In Aztec days Tlaxcala was the seat of an independent republic , which survived for a time under the protection of the Spaniards. The capital , Tlaxcala, stands 7,300 feet above the sea, and has some manufactures of woolens .
Only in Collier's New Encyclopedia
a town in the province of Oran, Algeria; 88 miles S. W. of Oran , with which it is connected by railway. It occupies the site of the Roman city of Pomaria , and under the Moors, in the 12th and 13th centuries, was a place of great importance , with a pop. of nearly 150,000. It stands on the N. slope of a steep mountain, at a height of 2,500 feet, in the midst of a well-irrigated and richly cultivated country , which especially abounds in fruit trees. The chief exports are olive oil, dried fruit, corn, wool, sheep and cattle, dressed alfa cloths, carpets, and leather goods. has 23 mosques, two of which are fine specimens of Moorish architecture. Pop. about 28,000. It
Only in Collier's New Encyclopedia
Place the articles from which you desire to draw the temper into a common iron clock key. Fill around it with brass or iron filings, and then plug up the open end with a steel iron or brass plug, made to fit closely. Take the handle of the key with your pliers and hold its pipe into the blaze of a lamp till red hot, then let it cool gradually. When sufficiently cold to handle, remove the plug, and you will find the article with its temper fully drawn, but in all other respects just as it was before. The reason for having the article thus plugged up while passing it through the heating and cooling process is, that springing always results from the action of changeable currents of atmosphere. The temper may be drawn from cylinders, staffs, pinions, or any other delicate pieces by this mode with perfect safety.
Only in American Watchmaker and Jeweler
There are nearly as many methods of annealing as there are workmen. The commonest methods are as follows: Heat to a dull red, bury in warm iron filings or ashes, and allowing the article to cool very gradually. Another method is to heat the piece as slowly as possible, and when at a low red heat put it between two pieces of dry board and screw them tightly in a vise. The steel burns its way into the wood, and on coming together around it they form a practically air-tight charcoal bed. Brannt gives the following method, which he says will make steel so soft that it can be worked like copper: Pulverize beef bones, mix them with equal parts of loam and calves' hair and stir the mixture into a thick paste with water. Apply a coat of this to the steel and place it in a crucible, cover this with another, fasten the two together with wire and close the joint hermetically with clay. Then put the crucible in the fire and heat slowly. When taken from the fire let it cool by placing it in ashes. On opening the crucible the steel will be found so soft that it can be engraved like copper.
Only in American Watchmaker and Jeweler
See Blueing Pan.
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Important: Safety Warning This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes. This information has been left in for historical purposes but should not be acted upon. To clean old brass, especially small figures, paper knives, etc., immerse them in a mixture of one part of nitric acid and half part of sulphuric acid. Allow them to remain a short time, rinse thoroughly in cold water, dry in sawdust and polish with Vienna lime, when they will appear like new.
Only in American Watchmaker and Jeweler
Important: Safety Warning This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes. This information has been left in for historical purposes but should not be acted upon. Silver and gold dials can be restored by gently heating the back over a spirit lamp and dipping the dial in diluted nitric acid. If the figures are painted however, they will be removed, and it will be necessary to repaint them, but if they are enameled on, the enamel will not be injured. If the figures are painted the dial may be cleaned by brushing with powdered cream of tarter either dry or in the form of a paste mixed with water. Avoid all the painted portions and work the paste in between the painted portions with a pointed peg wood. Wash with warm water and dry by carefully patting with a soft linen rag. To Grind Enamel from the Back of Dial. It is sometimes necessary to remove a portion of the enamel from the back of a dial to allow room for the motion work, etc. The most convenient method is to grind the back with emery, preferably in the shape of a wheel. Water should be applied to the work from time to time to prevent heating.
Only in American Watchmaker and Jeweler
Important: Safety Warning This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes. This information has been left in for historical purposes but should not be acted upon. The nickel plates of watches are sometimes found to have rust stains upon them. These can be removed by rubbing the spot with grease, allowing them to stand for a few days, and rubbing thoroughly with a cloth moistened with ammonia. In obstinate cases, repeat the operation or touch the stains with dilute hydrochloric acid and rub thoroughly. Rinse in clean water and polish. A mixture of fifty parts of rectified alcohol and one part of sulphuric acid is also valuable for cleaning nickel plates. Immerse for ten or fifteen seconds, no longer, rinse in alcohol, and dry in sawdust.
Only in American Watchmaker and Jeweler