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ty possessed by some substances of crystallizing in closely similar forms while unlike in chemical composition.

a perforated shelf, and used, when filled with water or mercury, for collecting gases in chemical operations. -- Pneumatic tube. See Pneumatic dispatch, above.

dioactive substance discovered by M. and MMe. Curie in pitchblende. It is closely related chemically to bismuth. It emits only alpha rays and is perhaps identical with radium F.

to each other by polymerism; specifically, a substance produced from another substance by chemical polymerization. [Formerly also written polymere.]

A copy of a print, writing, etc., made by placing it upon a chemically prepared paper which is acted upon by a gas which permeates the paper of the print, writing, etc.

ally: Muscular force; the weight and motion of fluids, as water and air; heat obtained by chemical combination, and applied to produce changes in the volume and pressure of steam, air, or other fluids; and electricity, obtained by chemical action, and applied to produce alternation of magnetic force. (b) An engine, or…

ught out by the direct actinic action of light without subsequent development by means of chemicals.

ourse or procedure; regular proceeding; as, the process of vegetation or decomposition; a chemical process; processes of nature. Tell her the process of Antonio's end. Shak.

Chemical properties, or those which are conditioned by affinity and composition; thus, combustion, explosion, and certain solutions are reactions occasioned by chemical properties. Chemical properties are identical when there is identity of composition and structure, and change according as the composition changes. 3.…

ginal universe, supposed to have been differentiated into what are recognized as distinct chemical elements.

a class of bodies existing ready formed in animal and vegetable tissues, and separable by chemical analysis, as albumin, sugar, collagen, fat, etc.

ts compounds color flames carmine and give a characteristic spectrum. It resembles barium chemically. Radium preparations are remarkable for maintaining themselves at a higher temperature than their surroundings, and for their radiations, which are of three kinds: alpha rays, beta rays, and gamma rays (see these terms)…

Having a rank smell or taste, from chemical change or decomposition; musty; as, rancid oil or butter.

To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.

The mutual or reciprocal action of chemical agents upon each other, or the action upon such chemical agents of some form of energy, as heat, light, or electricity, resulting in a chemical change in one or more of these agents, with the production of new compounds or the manifestation of distinctive characters. See Blow…

either by acting machanically in preventing the color, etc., from reaching the cloth, or chemically in changing the color so as to render it incapable of fixing itself in the fibers.. The pastes prepared for this purpose are called resist pastes. F. C. Calvert.

for different uses, as a bulb of glass with a curved beak to enter a receiver for general chemical operations, or a cylinder or semicylinder of cast iron for the manufacture of gas in gas works. Tubulated retort (Chem.), a retort having a tubulure for the introduction or removal of the substances which are to be acted…

doubly periodic. -- Periodic law (Chem.), the generalization that the properties of the chemical elements are periodic functions of their atomic wieghts. "In other words, if the elements are grouped in the order of their atomic weights, it will be found that nearly the same properties recur periodically throughout th…

rganic substances by which they lose the cohesion of their parts and pass through certain chemical changes, giving off usually in some stages of the process more or less offensive odors; to become decomposed by a natural process; to putrefy; to decay. Fixed like a plant on his peculiar spot, To draw nutrition, propagat…

ng native. -- Sal Jovis Etym: [NL.] (Old Chem.), salt tin, or stannic chloride; -- the alchemical name of tin being Jove. -- Sal Martis Etym: [NL.] (Old Chem.), green vitriol, or ferrous sulphate; -- the alchemical name of iron being. Mars. -- Sal microcosmicum Etym: [NL.] (Old Chem.) See Microcosmic salt, under Mic…