noun
definition
A chemical element (symbol S) with an atomic number of 16.
synonyms
definition
A yellowish green colour, like that of sulfur.
verb
definition
To treat with sulfur, or a sulfur compound, especially to preserve or to counter agricultural pests.
noun
definition
Any of various pierid butterflies of the subfamily Coliadinae, especially the sulphur coloured species. Compare yellow.
Examples of sulphur in a Sentence
This is the "sulphur showers" we hear of.
Barren Island was last in eruption in 1803, but there is still a thin column of steam from a sulphur bed at the top and a variable hot spring at the point where the last outburst of lava flowed into the sea.
Knit goods are manufactured, but the importance of the place is due to its sulphur springs, the waters of which are used for the treatment of skin diseases, gout, rheumatism, etc., and to the tonic air and fine scenery.
The Trinity--the three elements of matter--are sulphur, mercury, and salt.
On the shore below is the little village of Sermione, with sulphur baths.
The whole of the lead and sulphur of the sulphide was found to be present in the sulphate; in other words, the combining ratio of the lead and sulphur was not altered by the addition of the oxygen.
The streets are lined with trees, and water from the neighbouring sulphur springs flows along them in open channels.
Molybdenum disulphide, MoS 2, is found as the mineral molybdenite, and may be prepared by heating the trioxide with sulphur or sulphuretted hydrogen.
The materials required are iron borings, sal-ammoniac and sulphur; these are mixed together, moistened with water, and rammed into the socket, which is previously half filled with yarn, well caulked.
A pentasulphide B2S5 is prepared, in an impure condition, by heating a solution of sulphur in carbon bisulphide with boron iodide, and forms a white crystalline powder which decomposes under the influence of water into sulphur, sulphuretted hydrogen and boric acid.
During the summer it is a place of considerable resort for the sake of its waters - saline, chalybeate and sulphur - and it possesses the usual accessories of pump-rooms, baths and a recreation ground.
The chief minerals are sulphur, in the production of which Italy holds one of the first places, iron, zinc, lead; these, and, to a smaller extent, copper of an inferior quality, manganese and antimony, are successfully mined.
The bulk of the sulphur mines are in Sicily, while the majority of the lead and zinc mines are in Sardinia; much of the lead smelting is done at Pertusola, near Genoa, the company formed for this purpose having acquired many of the Sardinian mines.
Sulphur mining M h 1 supplies large industries of sulphur-refining and grinding, - in spite of American competition.
The closing of the French market to Sicilian produce, the devastation wrought by the phylloxera and the decrease of the sulphur trade had combined to produce in Sicily a discontent of which Socialist agitators took advantage to organize the workmen of the towns and the peasants of the country into groups known as fasci.
His first original paper (1799) was on the compounds of arsenic and antimony with oxygen and sulphur, and of his other separate investigations one of the most important was that on the compound ethers, begun in 1807.
Germanium compounds on fusion with alkaline carbonates and sulphur form salts known as thiogermanates.
Free or native sulphur, known also as "virgin sulphur," occurs in connexion with volcanoes and in certain stratified rocks in several modes, viz.
Crystals of sulphur are transparent or translucent and highly refractive with strong birefringence; they have a resinous or slightly adamantine lustre, and present the characteristic sulphur-yellow colour.
Sulphur containing selenium, such as occurs in the isle of Vulcano in the Lipari Isles, may be orange-red; and a similar colour is seen in sulphur which contains arsenic sulphide, such as that from La Solfatara near Naples.
The presence of tellurium in native sulphur is rare, but is known in certain specimens from Japan.
Volcanic sulphur usually occurs as a sublimate around or on the walls of the vents, and has probably been formed in many cases by the interaction of sulphur dioxide and hydrogen sulphide.
Sublimed sulphur also results from the spontaneous combustion of coal seams containing pyrites.
Some of the most important deposits of sulphur in the world are worked in Sicily, chiefly in the provinces of Caltanisetta and Girgenti, as at Racalmuto and Cattolica; and to a less extent in the provinces of Catania, Palermo (Lercara) and Trapani (Gibellina).
The sulphur occurs in Miocene marls and limestone, associated with.
It was formerly believed that the sulphur had a volcanic origin, but it is now generally held that it has either been reduced from gypsum by organic agencies, or more probably deposited from sulphur-bearing waters.
Liquid occasionally enclosed in the sulphur and gypsum has been found by 0.
Sulphur is occasionally found crystallized in Carrara marble; and the mineral occurs also in Calabria.
Fine crystals occur at Conil near Cadiz; whilst in the province of Teruel in Aragon, sulphur in a compact form replaces fresh-water shells and plant-remains, suggesting its origin from sulphur-springs.
Russia possesses large deposits of sulphur in Daghestan in Transcaucasia, and in the Transcaspian steppes.
Important deposits of sulphur are worked at several localities in Japan, especially at the Kosaka mine in the province of Rikuchiu, and at Yatsukoda-yama, in the province of Mutsu.
Sulphur is worked in Chile and Peru.
A complete list of localities for sulphur would include all the volcanic regions of the world.
In the British Islands native sulphur is only a mineralogical rarity, but it occurs in the Carboniferous Limestone of Oughterard in Co.
Sulphur dioxide and sulphuretted hydrogen are present in volcanic exhalations and in many mineral waters.
As quarried or mined free sulphur is always contaminated with limestone, gypsum, clay, &c.; the principle underlying its extraction from these impurities is one of simple liquation, i.e.
In the simplest and crudest method, as practised in Sicily, a mass of the ore is placed in a hole in the ground and fired; after a time the heat melts a part of the sulphur which runs down to the bottom of the hole and is then ladled out.
This exceptionally wasteful process, in which only one-third of the sulphur is recovered, has been improved by conducting the fusion in a sort of kiln.
This outlet having been closed by small stones and sulphate of lime cement, the pit is filled with sulphur ore, which is heaped up considerably beyond the edge of the pit and covered with a layer of burnt-out ore.
The molten sulphur accumulates on the sole, whence it is from time to time run out into a square stone receptacle, from which it is ladled into damp poplar-wood moulds and so brought into the shape of truncated cones weighing 110 to 130 lb each.
Crude sulphur, as obtained from kilns, contains about 3% of earthy impurities, and consequently needs refining.
The following apparatus (invented originally by Michel of Marseilles and improved subsequently by others) enables the manufacturer to produce either of two forms of "refined" sulphur which commerce demands.
The retorts are charged with molten sulphur from an upper reservoir, which is kept at the requisite temperature by means of the lost heat of the retort fires.
The chamber has a safety value at the top of its vault, which is so balanced that the least surplus pressure from within sends it up. The first puff of sulphur vapour which enters the chamber takes fire and converts the air of the chamber into a mixture of nitrogen and sulphur dioxide.
The next following instalments of vapour, getting diffused throughout a large mass of relatively cold gas, condense into a kind of "snow," known in commerce and valued as "flowers of sulphur" (fibres sulphuris).
If compact ("roll") sulphur is wanted the distillation is made to go on at the quickest admissible rate.
The sulphur so obtained is 98% pure.
Onethird of the sulphur is volatilized-3FeS 2 = Fe3S4 -12S-and obtained as a distillate.
Such pyrites sulphur is usually contaminated with arsenic, and conse- quently is of less value than Sicilian sulphur, which is characteristically free from this impurity.
The substance known as "milk of sulphur" (lac sulphuris) is very finely divided sulphur produced by the following, or some analogous, chemical process.