贝壳电子书 > 英文原著电子书 > industrial biography >

第6章

industrial biography-第6章

小说: industrial biography 字数: 每页4000字

按键盘上方向键 ← 或 → 可快速上下翻页,按键盘上的 Enter 键可回到本书目录页,按键盘上方向键 ↑ 可回到本页顶部!
————未阅读完?加入书签已便下次继续阅读!




purposes of tools; and would serve for neither a saw; a chisel; an

axe; nor a sword; whilst tempered steel could answer all these

purposes。  Hence we find the early warlike nations making the backs of

their swords of gold or copper; and economizing their steel to form

the cutting edge。  This is illustrated by many ancient Scandinavian

weapons in the museum at Copenhagen; which indicate the greatest

parsimony in the use of steel at a period when both gold and copper

appear to have been comparatively abundant。



The knowledge of smelting and working in iron; like most other arts;

came from the East。  Iron was especially valued for purposes of war;

of which indeed it was regarded as the symbol; being called 〃Mars〃 by

the Romans。*

 'footnote。。。

The Romans named the other metals after the gods。  Thus Quicksilver

was called Mercury; Lead Saturn; Tin Jupiter; Copper Venus; Silver

Luna; and so on; and our own language has received a colouring from

the Roman nomenclature; which it continues to retain。

 。。。'

We find frequent mention of it in the Bible。  One of the earliest

notices of the metal is in connexion with the conquest of Judea by

the Philistines。  To complete the subjection of the Israelites; their

conquerors made captive all the smiths of the land; and carried them

away。  The Philistines felt that their hold of the country was

insecure so long as the inhabitants possessed the means of forging

weapons。  Hence 〃there was no smith found throughout all the land of

Israel; for the Philistines said; Lest the Hebrews make them swords

or spears。  But the Israelites went down to the Philistines; to

sharpen every man his share; and his coulter; and his axe; and his

mattock。〃*

 'footnote。。。

I。  Samuel xiii。 19; 20。

 。。。'



At a later period; when Jerusalem was taken by the Babylonians; one

of their first acts was to carry the smiths and other craftsmen

captives to Babylon。*

 'footnote。。。

II。  Kings xxiv。 16。

 。。。'

Deprived of their armourers; the Jews were rendered comparatively

powerless。



It was the knowledge of the art of iron…forging which laid the

foundation of the once great empire of the Turks。  Gibbon relates that

these people were originally the despised slaves of the powerful Khan

of the Geougen。  They occupied certain districts of the mountain…ridge

in the centre of Asia; called Imaus; Caf; and Altai; which yielded

iron in large quantities。  This metal the Turks were employed by the

Khan to forge for his use in war。  A bold leader arose among them; who

persuaded the ironworkers that the arms which they forged for their

masters might in their own hands become the instruments of freedom。

Sallying forth from their mountains; they set up their standard; and

their weapons soon freed them。  For centuries after; the Turkish

nation continued to celebrate the event of their liberation by an

annual ceremony; in which a piece of iron was heated in the fire; and

a smith's hammer was successively handled by the prince and his

nobles。



We can only conjecture how the art of smelting iron was discovered。

Who first applied fire to the ore; and made it plastic; who

discovered fire itself; and its uses in metallurgy? No one can tell。

Tradition says that the metal was discovered through the accidental

burning of a wood in Greece。  Mr。 Mushet thinks it more probable that

the discovery was made on the conversion of wood into charcoal for

culinary or chamber purposes。  〃If a mass of ore;〃 he says;

〃accidentally dropped into the middle of the burning pile during a

period of neglect; or during the existence of a thorough draught; a

mixed mass; partly earthy and partly metallic; would be obtained;

possessing ductility and extension under pressure。  But if the

conjecture is pushed still further; and we suppose that the ore was

not an oxide; but rich in iron; magnetic or spicular; the result

would in all probability be a mass of perfectly malleable iron。  I

have seen this fact illustrated in the roasting of a species of

iron…stone; which was united with a considerable mass of bituminous

matter。  After a high temperature had been excited in the interior of

the pile; plates of malleable iron of a tough and flexible nature

were formed; and under circumstances where there was no fuel but that

furnished by the ore itself。〃*

 'footnote。。。

Papers on Iron and Steel; 363…4。

 。。。'



The metal once discovered; many attempts would be made to give to

that which had been the effect of accident a more unerring result。

The smelting of ore in an open heap of wood or charcoal being found

tedious and wasteful; as well as uncertain; would naturally lead to

the invention of a furnace; with the object of keeping the ore

surrounded as much as possible with fuel while the process of

conversion into iron was going forward。  The low conical furnaces

employed at this day by some of the tribes of Central and Southern

Africa; are perhaps very much the same in character as those adopted

by the early tribes of all countries where iron was first made。  Small

openings at the lower end of the cone to admit the air; and a larger

orifice at the top; would;  with charcoal; be sufficient to produce

the requisite degree of heat for the reduction of the ore。  To this

the foot…blast was added; as still used in Ceylon and in India; and

afterwards the water…blast; as employed in Spain (where it is known

as the Catalan forge); along the coasts of the Mediterranean; and in

some parts of America。



It is worthy of remark; that the ruder the method employed for the

reduction of the ore; the better the quality of the iron usually is。

Where the art is little advanced; only the most tractable ores are

selected; and as charcoal is the only fuel used; the quality of the

metal is almost invariably excellent。  The ore being long exposed to

the charcoal fire; and the quantity made small; the result is a metal

having many of the qualities of steel; capable of being used for

weapons or tools after a comparatively small amount of forging。

Dr。 Livingstone speaks of the excellent quality of the iron made by

the African tribes on the Zambesi; who refuse to use ordinary English

iron; which they consider 〃rotten。〃*

 'footnote。。。

Dr。 Livingstone brought with him to England a piece of the Zambesi

iron; which he sent to a skilled Birmingham blacksmith to test。

The result was; that he pronounced the metal as strongly resembling

Swedish or Russian; both of which kinds are smelted with charcoal。

The African iron was found 〃highly carbonized;〃 and 〃when chilled it

possessed the properties of steel。〃

 。。。'

Du Chaillu also says of the Fans; that; in making their best knives

and arrow…heads; they will not use European or American iron; greatly

preferring their own。  The celebrated wootz or steel of India; made in

little cakes of only about two pounds weight; possesses qualities

which no European steel can surpass。  Out of this material the famous

Damascus sword…blades were made; and its use for so long a period is

perhaps one of the most striking proofs of the ancient civilization

of India。



The early history of iron in Britain is necessarily very obscure。

When the Romans invaded the country; the metal seems to have been

already known to the tribes along the coast。  The natives had probably

smelted it themselves in their rude bloomeries; or obtained it from

the Phoenicians in small quantities in exchange for skins and food;

or tin。  We must; however; regard the stories told of the ancient

British chariots armed with swords or scythes as altogether

apocryphal。  The existence of iron in sufficient quantity to be used

for such a purpose is incompatible with contemporary facts; and

unsupported by a single vestige remaining to our time。  The country

was then mostly forest; and the roads did not as yet exist upon which

chariots could be used; whilst iron was too scarce to be mounted as

scythes upon chariots; when the warriors 

返回目录 上一页 下一页 回到顶部 0 0

你可能喜欢的