資料來源 : Webster's Revised Unabridged Dictionary (1913)
{Gas fitter}, one who lays pipes and puts up fixtures for
gas.
{Gas fitting}.
(a) The occupation of a gas fitter.
(b) pl. The appliances needed for the introduction of gas
into a building, as meters, pipes, burners, etc.
{Gas fixture}, a device for conveying illuminating or
combustible gas from the pipe to the gas-burner,
consisting of an appendage of cast, wrought, or drawn
metal, with tubes upon which the burners, keys, etc., are
adjusted.
{Gas generator}, an apparatus in which gas is evolved; as:
(a) a retort in which volatile hydrocarbons are evolved by
heat;
(b) a machine in which air is saturated with the vapor of
liquid hydrocarbon; a carburetor;
(c) a machine for the production of carbonic acid gas, for
a["e]rating water, bread, etc. --Knight.
{Gas jet}, a flame of illuminating gas.
{Gas machine}, an apparatus for carbureting air for use as
illuminating gas.
{Gas meter}, an instrument for recording the quantity of gas
consumed in a given time, at a particular place.
{Gas retort}, a retort which contains the coal and other
materials, and in which the gas is generated, in the
manufacture of gas.
{Gas stove}, a stove for cooking or other purposes, heated by
gas.
{Gas tar}, coal tar.
{Gas trap}, a drain trap; a sewer trap. See 4th {Trap}, 5.
{Gas washer} (Gas Works), an apparatus within which gas from
the condenser is brought in contact with a falling stream
of water, to precipitate the tar remaining in it.
--Knight.
{Gas water}, water through which gas has been passed for
purification; -- called also {gas liquor} and {ammoniacal
water}, and used for the manufacture of sal ammoniac,
carbonate of ammonia, and Prussian blue. --Tomlinson.
{Gas well}, a deep boring, from which natural gas is
discharged. --Raymond.
{Gas works}, a manufactory of gas, with all the machinery and
appurtenances; a place where gas is generated for lighting
cities.
{Laughing gas}. See under {Laughing}.
{Marsh gas} (Chem.), a light, combustible, gaseous
hydrocarbon, {CH4}, produced artificially by the dry
distillation of many organic substances, and occurring as
a natural product of decomposition in stagnant pools,
whence its name. It is an abundant ingredient of ordinary
illuminating gas, and is the first member of the paraffin
series. Called also {methane}, and in coal mines, {fire
damp}.
{Natural gas}, gas obtained from wells, etc., in
Pennsylvania, Ohio, and elsewhere, and largely used for
fuel and illuminating purposes. It is chiefly derived from
the Coal Measures.
{Olefiant gas} (Chem.). See {Ethylene}.
{Water gas} (Chem.), a kind of gas made by forcing steam over
glowing coals, whereby there results a mixture of hydrogen
and carbon monoxide. This gives a gas of intense heating
power, but destitute of light-giving properties, and which
is charged by passing through some volatile hydrocarbon,
as gasoline.
Marsh \Marsh\, n. [OE. mersch, AS. mersc, fr. mere lake. See
{Mere} pool, and cf. {Marish}, {Morass}.]
A tract of soft wet land, commonly covered partially or
wholly with water; a fen; a swamp; a morass. [Written also
{marish}.]
{Marsh asphodel} (Bot.), a plant ({Nartheeium ossifragum})
with linear equitant leaves, and a raceme of small white
flowers; -- called also {bog asphodel}.
{Marsh cinquefoil} (Bot.), a plant ({Potentilla palustris})
having purple flowers, and found growing in marshy places;
marsh five-finger.
{Marsh elder}. (Bot.)
(a) The guelder-rose or cranberry tree ({Viburnum Opulus}).
(b) In the United States, a composite shrub growing in salt
marshes ({Iva frutescens}).
{Marsh five-finger}. (Bot.) See {Marsh cinquefoil} (above).
{Marsh gas}. (Chem.) See under {Gas}.
{Marsh grass} (Bot.), a genus ({Spartina}) of coarse grasses
growing in marshes; -- called also {cord grass}. The tall
{S. cynosuroides} is not good for hay unless cut very
young. The low {S. juncea} is a common component of salt
hay.
{Marsh harrier} (Zo["o]l.), a European hawk or harrier
({Circus [ae]ruginosus}); -- called also {marsh hawk},
{moor hawk}, {moor buzzard}, {puttock}.
{Marsh hawk}. (Zo["o]l.)
(a) A hawk or harrier ({Circus cyaneus}), native of both
America and Europe. The adults are bluish slate above,
with a white rump. Called also {hen harrier}, and {mouse
hawk}.
(b) The marsh harrier.
{Marsh hen} (Zo["o]l.), a rail; esp., {Rallus elegans} of
fresh-water marshes, and {R. longirostris} of salt-water
marshes.
{Marsh mallow} (Bot.), a plant of the genus {Alth[ae]a} ( {A.
officinalis}) common in marshes near the seashore, and
whose root is much used in medicine as a demulcent.
{Marsh marigold}. (Bot.) See in the Vocabulary.
{Marsh pennywort} (Bot.), any plant of the umbelliferous
genus {Hydrocotyle}; low herbs with roundish leaves,
growing in wet places; -- called also {water pennywort}.
{Marsh quail} (Zo["o]l.), the meadow lark.
{Marsh rosemary} (Bot.), a plant of the genus {Statice} ({S.
Limonium}), common in salt marshes. Its root is powerfully
astringent, and is sometimes used in medicine. Called also
{sea lavender}.
{Marsh samphire} (Bot.), a plant ({Salicornia herbacea})
found along seacoasts. See {Glasswort}.
{Marsh St. John's-wort} (Bot.), an American herb ({Elodes
Virginica}) with small opposite leaves and flesh-colored
flowers.
{Marsh tea}. (Bot.). Same as {Labrador tea}.
{Marsh trefoil}. (Bot.) Same as {Buckbean}.
{Marsh wren} (Zo["o]l.), any species of small American wrens
of the genus {Cistothorus}, and allied genera. They
chiefly inhabit salt marshes.
資料來源 : WordNet®
marsh gas
n : methane gas produced when vegetation decomposes in water