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rbed by the living organism, and ultimately converted into the organized substance of its various tissues and organs. Dead bodies increase by apposition; living bodies by intrussusception. McKendrick.

One of the methods by which the various germinal layers of the ovum are differentiated.

Not given to variation or change; unalterable; unchangeable; always uniform. Physical laws which are invariable. I. Taylor. -- In*va"ri*a*ble*ness, n. -- In*va"ri*a*bly, adv.

the process of inversion; inverted; converted; as, invert sugar. Invert sugar (Chem.), a variety of sugar, consisting of a mixture of dextrose and levulose, found naturally in fruits, and produced artificially by the inversion of cane sugar (sucrose); also, less properly, the grape sugar or dextrose obtained from star…

-- Bog iron, bog ore; limonite. See Bog ore, under Bog. -- Cast iron (Metal.), an impure variety of iron, containing from three to six percent of carbon, part of which is united with a part of the iron, as a carbide, and the rest is uncombined, as graphite. It there is little free carbon, the product is white iron; if…

, tissues, and cells, to the influence of certain stimuli, response being manifested in a variety of ways, -- as that quality in plants by which they exhibit motion under suitable stimulation; esp., the property which living muscle processes, of responding either to a direct stimulus of its substance, or to the stimula…

itish, and very pure from of gelatin, chiefly prepared from the sounds or air bladders of various species of sturgeons (as the Acipenser huso) found in the of Western Russia. It used for making jellies, as a clarifier, etc. Cheaper forms of gelatin are not unfrequently so called. Called also fish glue.…

lines or curves, a pair of lines or curves exhibiting, on a diagram of energy, the law of variation of the pressure and density of a fluid, the one during the lowering, and the other during the raising, of its temperature, when the quantity of heat given out by the fluid during any given stage of the one process is equ…

ed. Blount. Cowell. At issue, in controversy; disputed; opposing or contesting; hence, at variance; disagreeing; inconsistent. As much at issue with the summer day As if you brought a candle out of doors. Mrs. Browning. -- Bank of issue, Collateral issue, etc. See under Bank, Collateral, etc. -- Issue pea, a pea, or a…

uch itching, occurring among bricklayers. -- Grocer's itch, an itching eruption, being a variety of eczema, produced by the sugar mite (Tyrogluphus sacchari). -- Itch insect (Zoöl.), a small parasitic mite (Sarcoptes scabei) which burrows and breeds beneath the human skin, thus causing the disease known as the itch.…

rd, white, opaque, fine-grained substance constituting the tusks of the elephant. It is a variety of dentine, characterized by the minuteness and close arrangement of the tubes, as also by their double flexure. It is used in manufacturing articles of ornament or utility.

A genus of parasitic Acarina, which includes various species of ticks. See Tick, the insect.

A Mexican name for a variety of Agave rigida, which furnishes a strong coarse fiber; also, the fiber itself, which is called also pita, and Tampico fiber. [Written also istle.]

A variety of the chamois found in the Pyrenees.

. J is the tenth letter of the English alphabet. It is a later variant form of the Roman letter I, used to express a consonantal sound, that is, originally, the sound of English y in yet. The forms J and I have, until a recent time, been classed together, and they have been used interchangeably.

A portable machine variously constructed, for exerting great pressure, or lifting or moving a heavy body through a small distance. It consists of a lever, screw, rack and pinion, hydraulic press, or any simple combination of mechanical powers, working in a compact pedestal or support and operated by a lever, crank, cap…

lied to looms for weaving figured goods, consisting of mechanism controlled by a chain of variously perforated cards, which cause the warp threads to be lifted in the proper succession for producing the required figure. -- Jacquard card, one of the perforated cards of a Jacquard apparatus. -- Jackquard loom, a loom w…

is jaguarondi), having a long, slim body and very short legs. Its color is grayish brown, varied with a blackish hue. It is arboreal in its habits and feeds mostly on birds.

One of the West India is islands. Jamaica ginger, a variety of ginger, called also white ginger, prepared in Jamaica from the best roots, which are deprived of their epidermis and dried separately. -- Jamaica pepper, allspice. -- Jamaica rose (Bot.), a West Indian melastomaceous shrub (Blakea trinervis), with showy p…

pan camphor, ordinary camphor brought from China or Japan, as distinguished from the rare variety called borneol or Borneo camphor. -- Japan clover, or Japan pea (Bot.), a cloverlike plant (Lespedeza striata) from Eastern Asia, useful for fodder, first noticed in the Southern United States about 1860, but now become v…