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asily fusible, but in its chemical relation it resembles aluminium or gallium. Symbol In. Atomic weight, 113.4.

That which is indivisible. By atom, nobody will imagine we intend to express a perfect indivisible, but only the least sort of natural bodies. Digby.

Not capable of being broken or separated into parts; as, infrangible atoms. [He] link'd their fetlocks with a golden band Infrangible. Pope.

ite, siliceous material, composed mainly of the shells of the microscopic plants called diatoms. It is used in polishing powder, and in the manufacture of dynamite.

oil engines, using either an atomized spray or the vapor (produced by heat) of a comparatively heavy oil, as petroleum or kerosene. In all of these the gas is mixed with a definite amount of air, the charge is composed in the cylinder and is then exploded either by a flame of gas (flame ignition -- now little used), by…

The state or quality of being invisible; also, that which is invisible. "Atoms and invisibilities." Landor.

cales, resembling plumbago, soft but brittle, and emitting a chlorinelike odor. Symbol I. Atomic weight 126.5. If heated, iodine volatilizes in beautiful violet vapors.

f osmium, it is the heaviest substance known, its specific gravity being 22.4. Symbol Ir. Atomic weight 192.5.

(rusted) by moisture, and is attacked by many corrosive agents. Symbol Fe (Latin Ferrum). Atomic weight 55.9. Specific gravity, pure iron, 7.86; cast iron, 7.1. In magnetic properties, it is superior to all other substances.

lævo-tartaric acids. In such compounds there is usually at least one unsymmetrical carbon atom. See Unsymmetrical.

edge and skill to brute strength, and demands an extensive practical knowledge of human anatomy.

lthough its beak, feet, and legs resemble those of gallinaceous birds, it is related in anatomical characters to the ducks and geese (Anseres). Called also horned screamer. The name is sometimes applied also to the chaja. See Chaja, and Screamer.

t was discovered by Ramsay and Travers in 1898. Liquefying point, -- 152º C.; symbol, Kr; atomic weight, 83.0.

ng it from cerium, didymium, and other rare elements with which it is usually associated. Atomic weight 138.5. Symbol La. [Formerly written also lanthanium.]

y fusible, forms alloys with other metals, and is an ingredient of solder and type metal. Atomic weight, 206.4. Symbol Pb (L. Plumbum). It is chiefly obtained from the mineral galena, lead sulphide.

A bond of affinity, or a unit of valence between atoms; -- applied to a unit of chemical force or attraction.

Manner of linking or of being linked; -- said of the union of atoms or radicals in the molecule.

quired. Its compounds occur abundantly, as in dolomite, talc, meerschaum, etc. Symbol Mg. Atomic weight, 24.4. Specific gravity, 1.75. Magnesium sulphate. (Chem.) Same as Epsom salts.

Of, pertaining to, or discovered by, Marcello Malpighi, an Italian anatomist of the 17th century. Malhighian capsules or corpuscles, the globular dilatations, containing the glomeruli or Malpighian tufts, at the extremities of the urinary tubules of the kidney. Malpighian corpuscles of the spleen, masses of adenoid tis…

ts ores occur abundantly in nature as the minerals pyrolusite, manganite, etc. Symbol Mn. Atomic weight 54.8.