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A sulphate in which but half the hydrogen of the acid is replaced by a positive element or radical, thus making the proportion of the acid to the positive or basic portion twice what it is in the normal sulphates; an acid sulphate.

A salt of sulphurous acid in which the base replaces but half the hydrogen of the acid; an acid sulphite.

A salt of tartaric acid in which the base replaces but half the acid hydrogen; an acid tartrate, as cream of tartar.

Equivalent in combining or displacing power to two atoms of hydrogen; dyad.

A double fluoride of boron and hydrogen, or some other positive element, or radical; -- called also fluoboride, and formerly fluoborate.

A compound radical, regarded as butane, less one atom of hydrogen.

hich contain six (or some multiple of six) carbon atoms, united with a variable number of hydrogen and oxygen atoms, but with the two latter always in proportion as to form water; as dextrose, C6H12O6.

nic acid, or carbonic oxide, according to the proportions of the oxygen; when united with hydrogen, it forms various compounds called hydrocarbons. Compare Diamond, and Graphite. Carbon compounds, Compounds of carbon (Chem.), those compounds consisting largely of carbon, commonly produced by animals and plants, and hen…

is carbureted to increase its illuminating power. [Written also carburetted.] Carbureted hydrogen gas, any one of several gaseous compounds of carbon and hydrogen, some of with make up illuminating gas. -- Light carbureted hydrogen, marsh gas, CH4; fire damp.

An apparatus in which coal gas, hydrogen, or air is passed through or over a volatile hydrocarbon, in order to confer or increase illuminating power. [Written also carburettor.]

An atmosphere of rare matter, composed principally of incandescent hydrogen gas, surrounding the sun and enveloping the photosphere. Portions of the chromosphere are here and there thrown up into enormous tongues of flame.

the card played. Combining weight (Chem.), that proportional weight, usually referred to hydrogen as a standard, and for each element fixed and exact, by which an element unites with another to form a distinct compound. The combining weights either are identical with, or are multiples or multiples of, the atomic weigh…

eight, so combined as to form a distinct substance; as, water is a compound of oxygen and hydrogen.

prevent accumulation of gas. -- Fire damp, a damp consisting chiefly of light carbureted hydrogen; -- so called from its tendence to explode when mixed with atmospheric air and brought into contact with flame.

intense heat; to burn or vaporize suddenly; as, to deflagrate refractory metals in the oxyhydrogen flame.

That which removes oxygen; hence, a reducing agent; as, nascent hydrogen is a deoxidizer.

from Detonate. Detonating gas, a mixture of two volumes of hydrogen with one volume of oxygen, which explodes with a loud report upon ignition. -- Detonating powder, any powder or solid substance, as fulminate of mercury, which when struck, explodes with violence and a loud report. -- Detonating primer, a primer expl…

A compound containing in the molecule two atoms of hydrogen united with some other element or radical. [Obs.]

Having two acid hydrogen atoms capable of replacement by basic atoms or radicals, in forming salts; bibasic; -- said of acids, as oxalic or sulphuric acids. Cf. Diacid, Bibasic.

A very intense light, produced by turning two streams of gas, one oxygen and the other hydrogen, or coal gas, in a state of ignition, upon a ball of lime; or a stream of oxygen gas through a flame of alcohol upon a ball or disk of lime; -- called also oxycalcium light, or lime light.