Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Geneva (Switzerland) or search for Geneva (Switzerland) in all documents.

Your search returned 7 results in 5 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), E. (search)
many years to the discovery and application of enamels of various colors to pottery. He was remarkably successful in true copies of natural objects. His method died with him. He died in 1589, in prison, for consciencea sake. John Petitot, of Geneva (1607 – 91), is regarded as one of the first to excel in portraits. He worked for Charles I. of England, and subsequently for Louis XIV. of France. The revocation of the Edict of Nantes drove him from France to the city of his birth, Geneva. Geneva. In 1632, Jean Tontin, of Chateaudun, introduced the practice of grinding the colors in oil of spike, instead of water. Faience and majolica may be considered forms of the art. The enameled portrait of herself, presented by Queen Victoria to Mr. Peabody, is fresh in the recollection of those who speak the language common to the donor and presentee. Enamel is applied to various kinds of pots and pans for stewing and preserving fruits whose flavor would be injured by contact with iron,
Knight's Mechanical Encyclopedia (ed. Knight), J. (search)
or; especially used in watches. The balance jewel always has an end-stone, or cap c, the balance running on the end of its pivot in order that it may have the utmost freedom; the pivot being but the 1/100 of an inch in diameter. Diamonds are sometimes used for end-stones, but rarely, if ever, for jewels, it being next to impossible to drill a hole sufficiently small in so hard a substance. The invention of the process of drilling holes in rubies is attributed to M. Fazio, a native of Geneva, who introduced it into London in the year 1700. Rubies are used as jewels in good watches. They are the hardest stone that can be drilled, but cheaper stones, such as crystals, garnets, etc., and even glass of hard quality, are often used. The lower portion of Fig. 2717 represents on an enlarged scale the jeweled pivot-hole for the verge, or the axis of the balance of a marine chronometer. a is a hardened steel pivot, which is turned with a fine cylindrical neck, and is made convex
Knight's Mechanical Encyclopedia (ed. Knight), P. (search)
inscription on the inner tablet was in Greek and nearly illegible. For important purposes, such tablets were carefully inscribed and fastened consecutively by a cord; or for letters, the boards were covered with a linen cloth. In Hanover and Geneva schedules of this kind are yet preserved. Leaves were also very generally employed in the early stages of society, and with some previous preparation are still in common use in the East. In the University of Gottingen is still preserved a Bg wheel termed the balance (h); this is impelled by the mainspring and train in one direction, and is returned by the force of the hair-spring on the arbor of the balance. It is probably the invention of Dr. Hooke. Jewels were added by Facio of Geneva about 1700. The compensation balance (i) was made by Harrison. (See chronometer.) The circumference is divided into two sections, the ends of which are free. The outer rim, or tire, is of brass, and the inner rim and cross-bar of steel, — thes
Knight's Mechanical Encyclopedia (ed. Knight), R. (search)
ts of England by the Romans. In the time of Edward I. they were ordered to be widened and cleared of trees within 200 feet of the road, for the prevention of robberies. Toll was granted on one in London in 1346. The parishes were made answerable for their condition in 1553. Toll-gates were erected in 1663. In the sixteenth year of the reign of the frivolous Charles II. a turnpike road was established through Hertfordshire, Cambridgeshire, and Huntingdonshire. The Simplon road from Geneva to Milan, built by Napoleon, cost the French government 17,000,000 livres ($3,250,000). MacAdam says: The measure of substituting pavements for convenient and useful roads is a kind of desperate remedy, to which ignorance has had recourse. The mode of road-making with broken stone, before MacAdam, was to make a foundation of large stone, on them place stones of a medium size, and finish off with the smallest. MacAdam employs broken stone of as hard a variety as possible, no stone to e
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
threads run longitudinally through the wick, to increase its conducting power. Hoard, November 20, 1866. The wick is made of paper pulp. Martine, March 5, 1867. The wick has a core of wood, twine, or some firm substance that will consume with the wick; the addition gives stiffness to the wick, and enables the teeth of the elevating wheel to operate upon it more effectively. Count Rumford invented the flat wick of soft cotton woven for the purpose, of the right width. Argand of Geneva invented the tubular wick and the lamp named after him, which was the first lamp requiring a wick of that character. The modification of the Argand, invented by Fresnel, for lighthouse purposes, has 4 concentric wicks, the outer one 3 1/4 inches in diameter. L'Ange invented the lamp-chimney, adding it to the tubular wick and central air-tube of Argand. The mosque of Cordova was lighted by oil-lamps and waxcandles, in the time of Al-Mansur. 75 pounds of cotton were consumed each mon