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devices; a stationary bell, used to sound calls or alarms; -- called also gong bell. Gong metal, an alloy (78 parts of copper, 22 of tin), from which Oriental gongs are made.

, usually reddish or ferruginous (owing to oxidized pyrites), forming the upper part of a metallic vein.

of the contents at the several levels. -- Graduated spring (Railroads), a combination of metallic and rubber springs.

Grains of paradise, the seeds of a species of amomum. -- grain tin, crystalline tin ore metallic tin smelted with charcoal. -- Grain weevil (Zoöl.), a small red weevil (Sitophilus granarius), which destroys stored wheat and othar grain, by eating out the interior. -- Grain worm (Zoöl.), the larva of the grain moth.…

ure water one degree centigrade. -- Gram equivalent (Electrolysis), that quantity of the metal which will replace one gram of hydrogen.

To form into grains or small masses; as, to granulate powder, sugar, or metal.

ative carbon in hexagonal crystals, also foliated or granular massive, of black color and metallic luster, and so soft as to leave a trace on paper. It is used for pencils (improperly called lead pencils), for crucibles, and as a lubricator, etc. Often called plumbago or black lead. Graphite battery (Elec.), a voltaic…

hrome. -- Emerald green. (Chem.) (a) A complex basic derivative of aniline produced as a metallic, green crystalline substance, and used for dyeing silk, wool, and mordanted vegetable fiber a brilliant green; - - called also aldehyde green, acid green, malachite green, Victoria green, solid green, etc. It is usually f…

A ring formed by twisting on itself a single strand of an unlaid rope; also, a metallic eyelet in or for a sail or a mailbag. Sometimes written grummet.

A gummy composition spread over the surface of a metal to be etched, to prevent the acid from eating except where an opening is made by the needle.

A plate of metal, beneath the stock, or the lock frame, of a gun or pistol, having a loop, called a bow, to protect the trigger.

A metal eye or socket attached to the sternpost to receive the pintle of the rudder. Ball gudgeon. See under Ball.

A topmast arranged with metal bands so that it will readily slide up and down the lower mast.

ssentially of a fly wheel fixed inside a rigid case to which is attached a thin flange of metal for supporting the instrument. It is used in studying the dynamics of rotating bodies.

Hughes. Hack saw, a handsaw having a narrow blade stretched in an iron frame, for cutting metal.

Having fine, short, and sharp points on the surface; as, the hackly fracture of metallic iron.

An electro-negative element or radical, which, by combination with a metal, forms a haloid salt; especially, chlorine, bromine, and iodine; sometimes, also, fluorine and cyanogen. See Chlorine family, under Chlorine.

Resembling salt; -- said of certain binary compounds consisting of a metal united to a negative element or radical, and now chiefly applied to the chlorides, bromides, iodides, and sometimes also to the fluorides and cyanides. -- n.

One of the two curved pieces of wood or metal, in the harness of a draught horse, to which the traces are fastened. They are fitted upon the collar, or have pads fitting the horse's neck attached to them.

An instrument for driving nails, beating metals, and the like, consisting of a head, usually of steel or iron, fixed crosswise to a handle. With busy hammers closing rivets up. Shak.