Browsing named entities in Knight's Mechanical Encyclopedia (ed. Knight). You can also browse the collection for Jasper, Tenn. (Tennessee, United States) or search for Jasper, Tenn. (Tennessee, United States) in all documents.

Your search returned 6 results in 6 document sections:

Knight's Mechanical Encyclopedia (ed. Knight), B. (search)
eight 21 pounds, was used to concentrate the rays, the focal distance being then 63 inches, the diameter of focus 1/2 inch. This lens was carried to China by an officer in the suite of Lord Macartney, and left at Pekin. The effects of the burning arrangement were as follows: — Weight.Time. Substances.Grains.Seconds. Gold (pure)204 Silver (pure)203 Copper (pure)3320 Platinum (pure)103 Nickel163 Bar-iron1012 Cast-iron103 Steel1012 Topaz345 Emerald225 Flint1930 Carnelian1075 Jasper1025 Onyx1020 Garnet1017 Spar1060 Rotten-stone1080 Slate102 Asbestos1010 Limestone1035 Pumice-stone1024 Lava1024 Volcanic clay1060 See burning-mirror. Burn′ing-house. （Metallurgy.) A miner's term for a kiln or roasting-furnace in which volatile mineral matters are expelled, as the sulphur from tin pyrites. A kiln. Burning-mir′ror. A concave mirror, or a combination of plane mirrors, so arranged as to concentrate the sun's heating rays on a common object. The
Knight's Mechanical Encyclopedia (ed. Knight), G. (search)
of those in the following list are only semi-precious, and are not strictly gems. In a mechanical point of view, they have about equal interest. Some common and softer minerals are introduced for the sake of comparison. Table of Hardness of Gems, etc. Agate12Onyx12 Amethyst11Opal10 Calcareous spar6Quartz10 Chalk3Ruby16-17 Crysolite10Ruby spinelle13 Carnelian11Sapphire16-17 Crystal11Sardonyx12 Diamond18-20Schorl10 Emerald12Topaz11-15 Fluor-spar7Tourmaline10 Gypsum5Zeolite8 Jasper9-11 Gem, Arti-fi′cial. Factitious stones are made of very pure, fusible, highly transparent, and dense glass, usually called paste or strass. The composition is silica, potassa, and oxide of lead, with some other ingredients at times, and metallic oxides for coloring. (See glass-coloring.) The beauty depends upon the clearness and the exact imitation of the natural gem, and also upon the care and skill in the cutting. Gem—cut′ting. The surfaces of gems are cut into facets to in<
Knight's Mechanical Encyclopedia (ed. Knight), L. (search)
meter of the burning focus to 1/2 inch, quadrupling its power. It cost $3,500, and melted : — Pure gold20 grains in 4 seconds. Silver20 grains in 3 seconds. Copper33 grains in 20 seconds. Platinum10 grains in 3 seconds. Cast-iron (a cube)10 grains in 3 seconds. Steel10 grains in 12 seconds. Common slate10 grains in 2 seconds. A topaz3 grains in 45 seconds. An emerald2 grains in 25 seconds. Crystal7 grains in 6 seconds. Lava10 grains in 7 seconds. Flint10 grains in 30 seconds. Jasper10 grains in 25 seconds. Carnelian10 grains in 75 seconds. Pumice-stone10 grains in 24 seconds. Wood burned immediately; water flashed into steam; bones fell into a calcined form at once. This glass was carried to China by Lord Macartney, and was left in Pekin. It was probably stolen or destroyed in the sacking of the summer palace by the allies. A flint-glass lens, weighing 224 pounds, was exhibited at the London Exposition, 1851. A burning-lens of great power may be obtaine
Knight's Mechanical Encyclopedia (ed. Knight), M. (search)
yer's hammer.Heart-bond. Brick-noggingHerring-bone. Brick-trimmer.Hewn-stone. Bridge-stone.Hod Broad-stone.Holing. Brocatelle.Hook-tool. Burin.Houguette. Bush-hammer.Hydraulic cement. Camber-slip.Hydraulic lime. Cantilever.Hydrostatic arch. Cement.Impost. Chain-bond.Incertum. ChamfretingIncrustation. Channeling-machine.Incrusted Channel-iron.Intrados. Charring-chisel.Invert. Chisel in marteline.Inverted arch. Ciborium.Isodomon. Ciper-tunnel.Jack-arch. Civery.Jamb. Clinker.Jasper. Closer.Joggle. Clustered arch.Jointer. Cob-wall.Jointing-rule. Coffer-work.Kevel. Columbaria.Keystone Commissure.Kinsh. Concrete.Knapping-hammer. Coping.Knobbing. CorbelLagging. Corbel-table.Lapis lazuli. Cordon.Later. Counter-fort.Ledgement. CountermureLedger. Counter-vault.Level. Countess.Lewis. Course.Liernes. Coursed masonry.Line-pin. Coursed-rubble masonry.Liner. Coussinet.Lockrand. Cover.Lunette. Coving.Lutheran. Creasing.Lychnoscope. Crest-tile.Mallet. Crestin
Knight's Mechanical Encyclopedia (ed. Knight), S. (search)
Md.1.355 Coal, Newcastle1.270 Coal, Welsh1.315 Coke1.000 Corundum3.710-3.981 Cryolite2.692-3.077 Diamond, Oriental3.521-3.550 Diamond, Brazilian3.444 Dolomite2.800 Earth2.194 Earth, loose1.500 Earth, rammed1.600 Earth, moist sand2.050 Emerald2.600 Emerald, Brazilian3.155 Flint2.586-2.664 Garnet, common3.576-3.688 Garnet, precious4.000-4.352 Granite2.613-2.956 Gypsum1.872-3.310 Gypsum, ordinary, about2.3 Hornblende, common3.600-3.830 Hyacinth4.000-4.620 Jade2.959-3.389 Jasper2.566-2.816 Jet1.259-1.300 Limestone2.700-2.837 Limestone, green3.182 Marl1.700-2.944 Malachite3.572-3.994 Marble2.516-2.858 Mica2.546-2.934 Millstone2.484 Mortar1.384-1.750 Mud, about1.630 Opal1.958-2.144 Peat0.600-1.329 Pitchstone1.970-2.720 Plaster of Paris1.176 Plumbago1.987-2.267 Porphyry2.670-2.790 Pumice-stone0.915 Quartz2.64-2.66 Rock crystal2.605-2.888 Ruby, Oriental4.283 Ruby, Brazilian3.531 Sand1.392-1.800 Sandstone2.08-2.52 Sapphire3.991-4.283 Sardonyx2.59
Knight's Mechanical Encyclopedia (ed. Knight), W. (search)
ial glaze, and named after the inventor, Josiah Wedgwood. See pottery. Several other kinds were introduced by Wedgwood. 1. Queens-ware or cream-colored ware, made by combining metallic oxides with pipe-clay and sand. 2. Terra-cotta; a ware in imitation of porphyry, granite, and other kinds of hard stone. 3. Basalt; a very hard black ware. 4. Porcelain-biscuit; differing from the above chiefly in being of a white color. 5. Bamboo-ware; a kind of cane-colored biscuit. 6. Jasper; a delicate white biscuit, suitable for cameos and statuettes. Weed′ing-hoe. See hoe. Weft. The filing or woof of a web; running from selvage to selvage. Also known as the shoot, or fram. Weft-fork. （Weaving.) a. One used in certain kinds of looms where the filling is laid in, one piece at a time. See slat-weaving loom. b. An arrangement for stopping the loom if the weft-thread should break or fail. The original stopmotion. It was invented by James Bullough. E