Part 20 (1/2)

_Residuu part, that which is left

_Antiseptic_, that which prevents putrefaction

What is Iron?

One of thefound in all mineral earths, and stones; in plants, and animal fluids; and is the chief cause of the varieties of color in all Iron is found in great masses, in various states, in the bowels of the earth; it is usually, however, compounded with stone, from which it is separated by the action of fire In some parts of the world, wholethese may be mentioned the Pilot knob and the Iron Mountain, in Missouri, being unsurpassed by anything of the kind found elsewhere

What are its characteristics?

It is hard, fusible, not very malleable, but extrereyish color, and nearly eight times heavier than water Without iron, society could round, in ation; it is therefore of the greatest use to man Iron tools have been used in all European countries as long as their histories have existed; this metal appears likewise to have been known and used by the inhabitants of the world in the earliest ages, being frequently mentioned in the Holy Scriptures In the fourth chapter of Genesis, Tubalcain is spoken of as ”a hammerer and artificer in every work of brass and iron,” and thus their existence was evidently known at that early period of the world

_Artificer_, one orks ormelted by fire

[Illustration: THE SALT MINES OF WIELICZCA]

What do youfro sometimes found pure, but uished by their weight, tenacity, hardness, opacity, color, and peculiar lustre, known as the ood conductors of heat and electricity; many of them are malleable, and soold, silver, iron, copper, mercury, lead, and tin

_Tenacity_, the firmness hich one part adheres to another

_Opacity_, want of transparency or clearness

What are Metals called in their natural state?

Ores; so named because the metal contained in them is either mixed with other metals, or with mineral earths, from which they are separated and purified by various , &c, but the ulated by the nature of the ore

What is Copper?

A hard, heavy, ductile metal, found native, and in many ores; of these the most important is _copper pyrites_, which is a sulphuret of copper Next to gold, silver, and platinum, copper is the most malleable and ductile of metals; it may be drawn into wires as fine as hair, or beaten into leaves as thin as those of silver The rust of copper is very poisonous Copper, mixed with a certain quantity of tin, forms bell-metal With a smaller proportion, it forures and statues It is an abundant metal, and is found in various parts of the world Native oxides of copper are found in Cornwall, Siberia, and in North and South Aen,[8] in a proportion not sufficient to produce acidity

_Sulphuret_, a combination of sulphur with a base

[Footnote 8: See Chapter XIII, article Oxygen]

What are the uses of Copper?