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rge class of substances obtained by extraction, and consisting largely of nitrogenous hydrocarbons, such as xanthin, hypoxanthin, and creatin extractives from muscle tissue.

ed toward the object glass, and separated from each other by about half the sum of their focal distances, the image viewed by the eye being formed between the two lenses. it was devised by Huyghens, who applied it to the telescope. Campani applied it to the microscope, whence it is sometimes called Campani's eyepiece.…

F is the sixth letter of the English alphabet, and a nonvocal consonant. Its form and sound are from the Latin. The Latin borrowed the form from the Greek digamma w consonant. The form and value of Greek letter came from the Phoenician, the ultimate source being probably Egyptian. Etymologically fis most closely relate…

a cotton factory. Factory leg (Med.), a variety of bandy leg, associated with partial dislocation of the tibia, produced in young children by working in factories.

, professors, and tutors in a college. Dean of faculty. See under Dean. -- Faculty of advocates. (Scot.) See under Advocate.

To fell; to cut down; as, to fall a tree. [Prov. Eng. & Local, U.S.]

.; an eccentric person; a fop. Milton. Our fantastics, who, having a fine watch, take all ocasions to drow it out to be seen. Fuller.

cid, under Sebacic. -- Fat series, Fatty series (Chem.), the series of the paraffine hydrocarbons and their derivatives; the marsh gas or methane series. -- Natural fats (Chem.), the group of oily substances of natural occurrence, as butter, lard, tallow, etc., as distinguished from certain fatlike substance of artif…

y; gross; as, a fatty substance. Fatty acid (Chem.), any one of the paraffin series of monocarbonic acids, as formic acid, acetic, etc.; -- so called because the higher members, as stearic and palmitic acids, occur in the natural fats, and are themselves fatlike substances. -- Fatty clays. See under Clay. -- Fatty de…

A dislocation of the strata of the vein.

Causing fever; as, a febriferous locality.

An advocate of confederation; specifically (Amer. Hist.), a friend of the Constitution of the United States at its formation and adoption; a member of the political party which favored the administration of president Washington.

A band of white matter bordering the hippocampus in the brain. -- Fim"bri*al, a.

-- Fire basket, a portable grate; a cresset. Knight. -- Fire beetle. (Zoöl.) See in the Vocabulary. -- Fire blast, a disease of plants which causes them to appear as if burnt by fire. -- Fire box, the chamber of a furnace, steam boiler, etc., for the fire. -- Fire brick, a refractory brick, capable of sustaining in…

One of several species of pheasants of the genus Euplocamus, having the lower back a bright, fiery red. They inhabit Southern Asia and the East Indies.

The upper part of a duet, trio, etc., either vocal or instrumental; -- so called because it generally expresses the air, and has a preëminence in the combined effect.

Sonant; vocal; -- applied to any one of the sonant or vocal consonants, as distinguished from a nonsonant (or sharp) consonant. Flat arch. (Arch.) See under Arch, n., 2. (b). -- Flat cap, cap paper, not folded. See under Paper. -- Flat chasing, in fine art metal working, a mode of ornamenting silverware, etc., produc…

t the streets in your new gilt chariot. Arbuthnot. One flaunts in rags, one flutters in brocade. Pope.

-- Flint brick, a fire made principially of powdered silex. -- Flint glass. See in the Vocabulary. -- Flint implements (Archæol.), tools, etc., employed by men before the use of metals, such as axes, arrows, spears, knives, wedges, etc., which were commonly made of flint, but also of granite, jade, jasper, and other…

A low, flat mass of floating ice. Floe rat (Zoöl.), a seal (Phoca foetida).