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FERRUM.— IRON.

H ANN. ; Palat. ; Sax. ; SoEc; Coxe ;Van Mons)

Heat a bar of iron in a strong fireexcited by the blast of bellows, andrub it upon a roll of sulphur : let thesulphuret of iron drop into water,then separate it from the sulphur,dry it and preserve it in a well stopp-ed bottle. (Dubl.)

Rub a roll of sulphur upon a bar of ironheated to redness ; receive the sulphuret,which flows drop by drop, into water; thenpour this off, and dry the powder quickly.(Fenn. ; Suec.)

R. Iron Filings, two parts.

Sublimed Sulphur, one part.

Mix them together, and project the mix-ture into an earthen crucible heated to red-ness ; suddenly increase the heat, and whenthe melted mass has become cold, reduce itto powder. (Ant.; Batav.; Gall.; Sax.)

Coxe prescribes three parts of filings andone part of sulphur. — -Hasn. — -an equal partof each.

R. Iron Filings, two parts and a half.

Pulverized Sulphur,

one part and a half.

Mix together, pass through a sieve, andadd a sufficient quantity of water to forma consistent paste ; at the expiration oftwelve hours, moisten the mass again, butless than at the former time ; thirty-six hoursafter this, triturate it in a mortar, and en-close the powder in a flask stopped withemery. (Ferr. ; Van Mons)

SULPHURET OF POTASS AND OF IRON.

Sulphuretum Potasses et Ferri. (Ant. ;

Hass. ; Sax.)R. Pure Iron Filings, one part.

Subcarbonate of Potass, 1 of each,Sublimed Sulphur, J two parts.

Melt together in a crucible ; pour themass upon an oiled marble slab, aud breakit into pieces when cold.

DEUTOXIDE OF IRON.

Oxydulum Ferri nigrum, Ferrum, Oxydida-tum nigrum, Oxydum ferroso-ferricum,Oxydum Ferri nigrum, Oxodes Ferri, Hy-peroxodes Ferri nigrum, Oxydum ferri-cum, Oxydum ferrosum, — Black Oxide ofIron.

1. natural.

Magnes. — Magnet, Load-stone.

Bruns. ; Hisp. ; Gall. ; Wirtem. ; Gui-BOURT ; Spielmann.

This substance, distinguished by its pe-culiar property, called magnetic, is in frag-

h

ments of a blackish-grey colour, hard yetnot difficult to be broken, exhibiting an un-equal fracture.

2. artificial.

JEthiops martialis. — jEthiops martial.

Dubl. ; Edinb. ; Ant. ; Austr. ; Batav. ;Bavar. ; Belg. ; Hisp. ; Gall.; Ferr.;Fenn. ; Form. Hop. Fr. ; Genev. ;Hann. ; Olden. ; Pol. ; Borus. ; Ross. ;Sax.; Suec; Bergius; Coxe ; Spiel-mann; Swediaur; Van Mons.

Oxidum Ferri nigrum purificatum.(Edinb.)

R. Scales of the oxidizedIron, found at the anvilof blacksmiths, any quantity.

Purify them by applying a magnet,which will attract the thinner andpurer scales only, and leave the lar-ger and less pure.

Ferri Oydiim nigrum. (Dubl.) s

R. Scales of the oxidizedIron, found at the anvilof blacksmiths, any quantity.Purify them by applying a magnet.Reduce them to powder, and separatethe finer particles by treating it inthe manner directed for the prepara-tion of chalk.

After the process o/Lemert.

R. Prepared Iron Filings, any quantity.

Put them into a large glass or earthernvessel, and pour upon them

River Water, a sufficient quantity,

to cover them by several fingers' breadth ;stir frequently, and leave the vessel alwaysopen, replacing the water as it becomesevaporated. At the end of several weeks,collect on a filter the very fine black powderwhich mixes with the water when agitated,and dry it quickly in an alembic. (Ant. ;Hisp.; Gall.; Suec; Spielmann)

It is better to employ a machine whichkeeps the filings in continual motion underthe surface of the water.

After the process of Cavezzali.

R. Iron Filings, any quantity.

Sprinkle it with water, and at the end ofan hour, collect it into a heap on an ironplate ; twelve hours afterwards, sprinkle itwith hot water ; at the expiration of twelvemore, moisten it again ; then, after twenty-