Chap. xvi.
That loadstone & iron ore are the same, but iron an extract from both, as other metals are from their own ores; & that all magnetick virtues1, though weaker, exist in the ore itself & in smelted3 iron.
H itherto we have declared the nature & powers of the loadstone, & also the properties & essence of iron; it now remains4 to show their mutual5 affinities6, & kinship, so to speak, & how very closely conjoined these substances are. At the highest part of the terrestrial globe, or at its perishable7 surface & rind, as it were, these two bodies usually originate & are produced in one and the same matrix, as twins in one mine. Strong loadstones are dug up by themselves, weaker ones too have their own proper vein8. Both are found in iron mines. Iron ore most often occurs alone, without strong loadstone (for the more perfect are rarely met with). Strong loadstone is a stone resembling iron; out of it is usually smelted the finest iron, which the Greeks call stomoma, the Latins acies, the Barbarians9 (not amiss) aciare, or aciarium. This same stone draws, repels10, controls other loadstones, directs itself to the poles of the world, picks up smelted iron, and works many other wonders, some already set forth11 by us, but many more which we must demonstrate more fully12. A weaker loadstone, however, will exhibit all these powers, but in a lesser13 degree; while iron ore, & also wrought14 iron (if they have been prepared) show their strength in all magnetick experiments not less than do feeble and weak loadstones; & an inert15 piece of ore, & one possessed16 of no magnetick properties, & just thrown out98 of the pit, when roasted in the fire & prepared with due art (by the elimination17 of humours & foreign excretions) awakes, and becomes in power & potency18 a magnet, occasionally a stone or iron ore is mined, which attracts forthwith without being prepared: for native iron of the right colour attracts and governs iron magnetically. One form then belongs to the one mineral, one species, one self-same essence. For to me there seems to be a greater difference, & unlikeness, between the strongest loadstone, & a weak one which scarce can attract a single chip of iron; between one that is stout20, strong, metallick, & one that is soft, friable21, clayey; amidst such variety of colour, substance, quality, & weight; than there is on the one hand between the best ore, rich in iron, or iron that is metallick from the beginning, and on the other the most excellent loadstone. Usually, too, there are no marks to distinguish them, and even metallurgists cannot decide between them, because they agree together in all respects. Moreover we see that the best loadstone and the ore of iron are both as it were distressed22 by the same maladies & diseases, both run to old age in the same way & exhibit the same marks of it, are preserved & keep their properties by the same remedies & safeguards; & yet again the one increases the potency of the other, & by artfully devised adjuncts marvellously intensifies23, & exalts24 it. For both are impaired25 by the more acrid26 juices as by poisons, & the aqua fortis of the Chemists inflicts27 on both the same wounds, and when exposed too long to harm from the atmosphere, they both alike pine away, so to speak, & grow old; each is preserved by being kept in the dust & scrapings of the other; & when a fit piece of steel or iron is adjoined above its pole, the loadstone's vigour28 is augmented29 through the firm union. The loadstone is laid up in iron filings, not that iron is its food; as though loadstone were alive and needed feeding, as Cardan philosophizes99; nor yet that so it is delivered from the inclemency30 of the weather (for which cause it as well as iron is laid up in bran by Scaliger; mistakenly, however, for they are not preserved well in this way, and keep for years their own fixed31 forms): nor yet, since they remain perfect by the mutual action of their powders, do their extremities32 waste away, but are cherished & preserved, like by like. For just as in their own places, in the mines, bodies like to each other endure for many ages entire and uncorrupt, when surrounded by bodies of the same stuff, as the lesser interior parts in a great mass: so loadstone and ore of iron, when inclosed in a mound34 of the same material, do not exhale35 their native humour, do not waste away, but retain their soundness. A loadstone lasts longer in filings of smelted iron, & a piece of iron ore excellently also in dust of loadstone; as also smelted iron in filings of loadstone & even in those of iron. Then both these allied36 bodies have a true & just form of one & the same species; a form which until this day was considered by all, owing to their outward unlikeness & the inequality of the potency that is the same innate37 in both, to be different & unlike in kind; the smatterers not understanding that the same powers, though differing in strength, exist in both alike. And in fact they both are true & intimate parts of the earth, & as such retain the prime natural properties of mutually attracting, of moving, & of disposing themselves toward the position of the world, and of the terrestrial globe; which properties they also impart to each other, and increase, confirm, receive, and retain each other's forces. The stronger fortifies38 the weaker, not as though aught were taken away from its own substance, or its proper vigour, nor because any corporeal39 substance is imparted, but the dormant40 virtue2 of the one is aroused by the other, without loss. For if with a single small stone you touch a thousand bits of iron for the use of mariners100, that loadstone attracts iron no less strongly than before; with the same stone weighing one pound, any one will be able to suspend in the air a thousand pounds of iron. For if any one were to fix high up on the walls so many iron nails of so great a weight, & were to apply to them the same number of nails touched, according to the art, by a loadstone, they would all be seen to hang in the air through the force of one small stone. So this is not solely41 the action, labour, or outlay42 of the loadstone; but the iron, which is in a sense an extract from loadstone, and a fusion43 of loadstone into metal, & conceives vigour from it, & by proximity44 strengthens the magnetick faculties45, doth itself, from whatever lode46 it may have come, raise its own inborn47 forces through the presence & contact of the stone, even when solid bodies intervene. Iron that has been touched, acts anew on another piece of iron by contact, & adapts it for magnetick movements, & this again a third. But if you rub with a loadstone any other metal, or wood, or bones, or glass, as they will not be moved toward any particular and determinate quarter of heaven, nor be attracted by any magnetick body, so they are able not to impart any magnetick property to other bodies or to iron itself by attrition, & by infection. Loadstone differs from iron ore, as also from some weaker magnets, in that when molten in the furnace into a ferric & metallick fused mass, it does not so readily flow & dissolve into metal; but is sometimes burnt to ashes in large furnaces; a result which it is reasonable to suppose arises from its having some kind of sulphureous matter mixed with it, or from its own excellence48 & simpler nature, or from the likeness19 & common form which it has with the common mother, the Great Magnet. For earths, and iron stones, magnets abounding49 in metal, are the more imbued50 & marred51 with excrementitious metallick humours, and earthy corruptions52 of substance, as numbers of loadstones are weaker from the mine; hence they are a little further remote from the common mother, & are degenerate53, & when smelted in the furnace undergo fusion more easily, & give out a more certain metallick product, & a metal that is softer, not a tough steel. The majority of loadstones (if not unfairly burnt101) yield in the furnace a very excellent iron. But iron ore also agrees in all those primary qualities with loadstone; for both, being nearer and more closely akin54 to the earth above all bodies known to us, have in themselves a magnetick substance, & one that is more homogenic, true & cognate55 with the globe of the earth; less infested56 & spoiled by foreign blemish57; less confused with the outgrowths of earth's surface, & less debased by corrupt33 products. And for this reason Aristotle in the fourth book of his Meteora seems not unfairly to separate iron from all the rest of the metals. Gold, he says, silver, copper58, tin, lead, belong to water; but iron is of the earth. Galen, in the fourth chapter of De Facultatibus Simplicium Medicamentorum, says that iron is an earthy & dense59 body. Accordingly a strong loadstone is on our showing especially of the earth: the next place is occupied by iron ore or weaker loadstone; so the loadstone is by nature and origin102** of iron, and it and magnetick iron are both one in kind. Iron ore yields iron in furnaces; loadstone also pours forth iron in the furnaces, but of a much more excellent sort, that which is called steel or blade-edge; and the better sort of iron ore is a weak loadstone, the best loadstone being a most excellent ore of iron, in which, as is to be shown by us, the primary properties are grand and conspicuous60. Weaker loadstone or iron ore is that in which these properties are more obscure, feeble, and are scarce perceptible to the senses.
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1 virtues | |
美德( virtue的名词复数 ); 德行; 优点; 长处 | |
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2 virtue | |
n.德行,美德;贞操;优点;功效,效力 | |
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3 smelted | |
v.熔炼,提炼(矿石)( smelt的过去式和过去分词 );合演( costar的过去式和过去分词 );闻到;嗅出 | |
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4 remains | |
n.剩余物,残留物;遗体,遗迹 | |
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5 mutual | |
adj.相互的,彼此的;共同的,共有的 | |
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6 affinities | |
n.密切关系( affinity的名词复数 );亲近;(生性)喜爱;类同 | |
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7 perishable | |
adj.(尤指食物)易腐的,易坏的 | |
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8 vein | |
n.血管,静脉;叶脉,纹理;情绪;vt.使成脉络 | |
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9 barbarians | |
n.野蛮人( barbarian的名词复数 );外国人;粗野的人;无教养的人 | |
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10 repels | |
v.击退( repel的第三人称单数 );使厌恶;排斥;推开 | |
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11 forth | |
adv.向前;向外,往外 | |
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12 fully | |
adv.完全地,全部地,彻底地;充分地 | |
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13 lesser | |
adj.次要的,较小的;adv.较小地,较少地 | |
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14 wrought | |
v.引起;以…原料制作;运转;adj.制造的 | |
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15 inert | |
adj.无活动能力的,惰性的;迟钝的 | |
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16 possessed | |
adj.疯狂的;拥有的,占有的 | |
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17 elimination | |
n.排除,消除,消灭 | |
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18 potency | |
n. 效力,潜能 | |
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19 likeness | |
n.相像,相似(之处) | |
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21 friable | |
adj.易碎的 | |
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22 distressed | |
痛苦的 | |
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23 intensifies | |
n.(使)增强, (使)加剧( intensify的名词复数 )v.(使)增强, (使)加剧( intensify的第三人称单数 ) | |
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24 exalts | |
赞扬( exalt的第三人称单数 ); 歌颂; 提升; 提拔 | |
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25 impaired | |
adj.受损的;出毛病的;有(身体或智力)缺陷的v.损害,削弱( impair的过去式和过去分词 ) | |
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26 acrid | |
adj.辛辣的,尖刻的,刻薄的 | |
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27 inflicts | |
把…强加给,使承受,遭受( inflict的第三人称单数 ) | |
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28 vigour | |
(=vigor)n.智力,体力,精力 | |
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29 Augmented | |
adj.增音的 动词augment的过去式和过去分词形式 | |
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30 inclemency | |
n.险恶,严酷 | |
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31 fixed | |
adj.固定的,不变的,准备好的;(计算机)固定的 | |
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32 extremities | |
n.端点( extremity的名词复数 );尽头;手和足;极窘迫的境地 | |
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33 corrupt | |
v.贿赂,收买;adj.腐败的,贪污的 | |
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34 mound | |
n.土墩,堤,小山;v.筑堤,用土堆防卫 | |
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35 exhale | |
v.呼气,散出,吐出,蒸发 | |
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36 allied | |
adj.协约国的;同盟国的 | |
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37 innate | |
adj.天生的,固有的,天赋的 | |
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38 fortifies | |
筑防御工事于( fortify的第三人称单数 ); 筑堡于; 增强; 强化(食品) | |
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39 corporeal | |
adj.肉体的,身体的;物质的 | |
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40 dormant | |
adj.暂停活动的;休眠的;潜伏的 | |
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41 solely | |
adv.仅仅,唯一地 | |
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42 outlay | |
n.费用,经费,支出;v.花费 | |
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43 fusion | |
n.溶化;熔解;熔化状态,熔和;熔接 | |
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44 proximity | |
n.接近,邻近 | |
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45 faculties | |
n.能力( faculty的名词复数 );全体教职员;技巧;院 | |
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46 lode | |
n.矿脉 | |
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47 inborn | |
adj.天生的,生来的,先天的 | |
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48 excellence | |
n.优秀,杰出,(pl.)优点,美德 | |
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49 abounding | |
adj.丰富的,大量的v.大量存在,充满,富于( abound的现在分词 ) | |
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50 imbued | |
v.使(某人/某事)充满或激起(感情等)( imbue的过去式和过去分词 );使充满;灌输;激发(强烈感情或品质等) | |
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51 marred | |
adj. 被损毁, 污损的 | |
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52 corruptions | |
n.堕落( corruption的名词复数 );腐化;腐败;贿赂 | |
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53 degenerate | |
v.退步,堕落;adj.退步的,堕落的;n.堕落者 | |
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54 akin | |
adj.同族的,类似的 | |
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55 cognate | |
adj.同类的,同源的,同族的;n.同家族的人,同源词 | |
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56 infested | |
adj.为患的,大批滋生的(常与with搭配)v.害虫、野兽大批出没于( infest的过去式和过去分词 );遍布于 | |
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57 blemish | |
v.损害;玷污;瑕疵,缺点 | |
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58 copper | |
n.铜;铜币;铜器;adj.铜(制)的;(紫)铜色的 | |
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59 dense | |
a.密集的,稠密的,浓密的;密度大的 | |
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60 conspicuous | |
adj.明眼的,惹人注目的;炫耀的,摆阔气的 | |
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