The pan was then primed, the sliding cover brought over it, and the pyrites holder depressed, bringing the pyrites down on the cover.
In some cases the wheel winds itself, when the pyrites holder is drawn back, thus dispensing with a key.
When calcined zinciferous pyrites have to be examined, the estimation of zinc is similar to that employed in the analysis of zinc ore.
Analysis of Zinc Ash and Calcined Pyrites by Means of Ammonium Carbonate.
In the thermo-electrically positive crystals of pyrites the faces of the pentagonal dodecahedron are striated parallel to the cubic edges, whilst in the rarer negative crystals the faces are striated perpendicular to these edges.
Cobaltite, smaltite and other sulphides and sulpharsenides of the pyrites group of minerals crystallize in these forms.
Pyrites had the same meaning among the ancients that it has among the moderns; at least as far as iron pyrites or bisulphuret of iron is concerned.
This description obviously applies to a kind of slate-clay, which probably contained pyrites mixed with it of the decomposing kind.
At these places, it is most frequently connected with a gangue of heavy spar and calcareous spar, with pyrites of iron.
This stratum contains iron pyrites in a decomposed state.
I also found this mineral at Dubuque's mines, and in small crystals in the metalliferous limestone bordering the Fox River, between the post of Green Bay and Winnebago Lake, where it is associated with iron pyrites and blende.
All parts of the tree are penetrated by pyrites of iron of a brass yellow color, disseminated through the most solid and stony parts of the interior, filling interstices in the outer rind, or investing its capillary pores.
It is smoothly carved and has a fragment of sky-blue glass inlaid to represent the left eye and a bit of iron pyrites for the right.
Simpson speaks[N406] of two lumps of iron pyrites being used for striking fire, but he does not make it clear whether he saw this at Point Barrow or only at Kotzebue Sound.
An angular bit of iron pyrites is inlaid to represent the left eye, and a similar piece appears to have been lost from the right eye.
A man informed them that "he had learned it from his father rather for amusement than for utility; the two lumps of iron pyrites certainly answering the purpose a great deal better.
Iron pyrites appears to have been used quite generally among the Eskimo.
But the rocks most frequently represented were propylitic grey hypersthene-andesites, in which the pyroxene is mostly changed into bastite, whilst the surface often sparkles with pyrites (see page 297).
Blue Ochre, which has been improperly called Native Prussian Blue, is a native hydrated phosphate of iron of rare occurrence, found with iron pyrites in Cornwall, and also in North America.
The edge is sharper, and the form, I think, more regular than if it had been used in conjunction with pyrites or steel, and I am therefore inclined to regard it as a tool.
A piece of iron pyrites with a groove worn in it and a peculiarly shaped implement of flint with evident marks of use at the larger end were found with an interment near Basingstoke Station.
When exposed upon or near the surface of the ground, pyrites is very liable to decomposition, and even if occurring with ancient interments it would be very likely to be disregarded.
It would be interesting to compare these objects with the pyrites and pebbles in use among the Fuegians[1429], who employ dried moss or fungus by way of tinder, but appear to find some difficulty in producing fire.
Method of using Pyrites and “Scraper” for Striking a Light.
Messieurs Pyrites and Sulphuret may be willing to put me in the way to develop my property.
Black quartz and white quartz from the Jebel el-Abyaz, gave no results except a small portion of copper pyrites in a lump of quartz (Box No.
Other deposits are iron-stained and have the appearance of the decomposed iron pyrites which abounds in this neighbourhood.
Calcination is only advisable for ores which contain relatively much iron pyrites and little copper pyrites.
Shaft calcining furnaces like the Gerstenhoffer, Hasenclever, and others designed for burningpyrites fines have not found favour in modern copper works.
By the ancients copper-pyrites was included with other minerals under the term pyrites, though the copper-ore from Cyprus referred to by Aristotle as chalcites may possibly have been identical with this mineral.
The ore is a compact iron pyritescontaining copper 2.
The lode is a large irregular one of pure arsenical pyrites carrying, in addition to gold and silver, nickel and cobalt.
The close relation which the richness of gold veins bears to the prevalence of pyrites has been long familiar both to scientific observers and to practical miners.
Meanwhile there is a gradual wasting away of the pyrites or positive pole, its sulphur being oxidised to sulphuric acid and its iron to sesquioxide of iron, or hematite, a substance very generally associated with gold nuggets.
Such masses of pyrites are by no means uncommon in our drifts or the beds of our mountain streams.
If gold the steel point will readily prick it; if pyrites or yellow mica the point will glance off or only scratch it.
A mass of commonpyrites (bisulphide of iron) weighing only 12 lbs.
Careful dissolving of the pyrites and gangue so as to leave the gold intact failed to find it in any larger diameter.
First satisfying themselves that the pyrites really could produce "stars" from the flint, the two hurried down-stream, in search of the right kind of wood.
It was late in the day when the nine reached the stream in whose bed rested the pyrites taken from Corrus and Dulnop.
In fact, iron pyrites is often called "fool gold," so deceptive is its glitter.
Here the two fragments of pyrites were thrown, under orders, into the water; so that the eight villagers might know just why the whole thing was being done.
Paraffins Peat Pecopteris Pennsylvanian anthracite Persian fire-worshippers Pitch Plumbago Polyzoa Prejudice against aniline dyes Prohibitions of the use of coal Proportions of explosive mixtures Psaronius "Purifiers" Pyrites in coal Q.
Roasted and powdered copper pyrites added to ores of silver when reduced to the state of a magma [i.
It becomes black on the dorsal surface of the Stercoraceous Geotrupes and the Mimic Geotrupes; and, with a quick change, it turns into amethyst under the belly of the first and into copper pyrites under the belly of the second.
Black above, the Mimic Geotrupes is the colour of copper pyrites below; also black in all parts exposed to the light of day, the Stercoraceous Geotrupes displays a ventral surface of a glorious amethyst violet.
The variety of pyrites which undergoes spontaneous decomposition in the air, is known to be a compound, or rather mixture of the two species of pyrites.
Lavoisier put a quantity of the decomposing pyrites under a glass jar, and found that the process went on just as well as in the open air.
Iron pyrites is known to be a compound of iron and sulphur.
A specimen of pyrites containing large crystals is an interesting subject of study.
History records that shiploads of the valueless yellow iron pyrites were sent to England by explorers of America on the supposition that they were accumulating gold.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "pyrites" in a variety of sentences. We hope that you will now be able to make sentences using this word.
