Copperas

At Walton-under-the-Naze they find on the shore copperas-stone in great quantities; and there are several large works called copperas houses, where they make it with great expense. ❋ Unknown (2003)

Though often a brilliant colored mineral, it is neither gold nor copper; but it may be associated with one or both of them, as found in North Carolina, and it is valuable of itself, being easily converted into copperas, which is sulphate of iron. ❋ Unknown (1869)

Sulphuric acid has also been supposed to be sometimes an ingredient of peat -- which combining with iron, (always present,) would favor sulphate of iron, or copperas, which is a poison to useful plants. ❋ Unknown (1861)

Another substance which has been found to have an injurious action is ferrous sulphate or "copperas," a substance which is apt to be present in badly drained soils, or soils in which there is much actively putrefying organic matter. ❋ Charles Morton Aikman (N/A)

Other substances also have been examined, such as copperas ores from various parts of the State; numerous specimens supposed to be, or contain, saltpetre, but mostly containing only Epsom or Glauber's Salt. ❋ Mississippi. Legislature. House Of Representatives (1862)

I drank wine of immoral bouquet: sea foam, midday drizzle, ash of poppies, copperas, mustard. ❋ Unknown (2009)

An odor of copperas issued in puffs from the roofs of the neighboring factory. ❋ Unknown (2008)

The eighteenth-century development of the Saxon blue, or copperas, vat was based on new combinations of ingredients, requiring only slight changes to skills. ❋ Unknown (2006)

Put it into 10 gallons of cold water, and add half a pound of Potash. 1 lb green copperas, 3 lbs quicklime. ❋ Unknown (2006)

The first of these changes was the development of the copperas vat, used in England in the 1730s for solid coloring of cloths as well as the creation of resist patterns. 10 In this process, prepared indigo is added to a mixture of copperas (ferrous sulfate) with lime and potash. ❋ Unknown (2006)

This malignant liquor was compounded, by the engineer who invented it, of two ingredients, which are, gall and copperas; by its bitterness and venom to suit, in some degree, as well as to foment, the genius of the combatants. ❋ Unknown (2003)

After completion of laconic epistolary compositions she abandoned the implement of calligraphy in the encaustic pigment, exposed to the corrosive action of copperas, green vitriol and nutgall. ❋ Unknown (2003)

There was no doubt that the poisoned barrel had at some time or other contained copperas; but what strange fatality had converted it into a water-cask, or what fatality, stranger still, had caused it to be brought on board the raft, was a problem that none could solve. ❋ Unknown (2003)

In the hills of Gizedo, correspondent to the district of Santa Rosa, are extracted sulphur and copperas. ❋ Robert A. Wilson (N/A)

= Ferrous Sulphate = (copperas) was formerly very extensively used for disinfecting purposes, but is not so used at present, owing to the fact that it has been learned that the germicidal power of this material is very slight, and that its value depends mostly upon its deodorizing power, for which reason it is used on excreta in privy vaults, etc. ❋ Kenelm Winslow (N/A)

On boiling it with copperas it becomes violet, while on boiling with potassium dichromate it changes to a yellowish brown. ❋ Various (N/A)

When quite disintegrated, they are transferred to another tank -- a barrel may be used for small quantities -- and thus this refuse is exposed to the reducing action of copperas and lime. ❋ Various (N/A)