All these tiresome19 things we had to attend to constantly. Streams of dirty water flowed always from the pans and were carried off in broad wooden troughs to the ravine. One would not suppose that atoms of gold and silver would float on top of six inches of water, but they did; and in order to catch them, coarse blankets were laid in the troughs, and little obstructing20 “riffles” charged with quicksilver were placed here and there across the troughs also. These riffles had to be cleaned and the blankets washed out every evening, to get their precious accumulations—and after all this eternity21 of trouble one third of the silver and gold in a ton of rock would find its way to the end of the troughs in the ravine at last and have to be worked over again some day. There is nothing so aggravating22 as silver milling. There never was any idle time in that mill. There was always something to do. It is a pity that Adam could not have gone straight out of Eden into a quartz23 mill, in order to understand the full force of his doom24 to “earn his bread by the sweat of his brow.” Every now and then, during the day, we had to scoop25 some pulp out of the pans, and tediously “wash” it in a horn spoon—wash it little by little over the edge till at last nothing was left but some little dull globules of quicksilver in the bottom. If they were soft and yielding, the pan needed some salt or some sulphate of copper or some other chemical rubbish to assist digestion26; if they were crisp to the touch and would retain a dint27, they were freighted with all the silver and gold they could seize and hold, and consequently the pan needed a fresh charge of quicksilver. When there was nothing else to do, one could always “screen tailings.” That is to say, he could shovel11 up the dried sand that had washed down to the ravine through the troughs and dash it against an upright wire screen to free it from pebbles28 and prepare it for working over.
The process of amalgamation differed in the various mills, and this included changes in style of pans and other machinery29, and a great diversity of opinion existed as to the best in use, but none of the methods employed, involved the principle of milling ore without “screening the tailings.” Of all recreations in the world, screening tailings on a hot day, with a long-handled shovel, is the most undesirable30.
At the end of the week the machinery was stopped and we “cleaned up.” That is to say, we got the pulp out of the pans and batteries, and washed the mud patiently away till nothing was left but the long accumulating mass of quicksilver, with its imprisoned31 treasures. This we made into heavy, compact snow-balls, and piled them up in a bright, luxurious32 heap for inspection33. Making these snow-balls cost me a fine gold ring—that and ignorance together; for the quicksilver invaded the ring with the same facility with which water saturates34 a sponge—separated its particles and the ring crumbled35 to pieces.
We put our pile of quicksilver balls into an iron retort that had a pipe leading from it to a pail of water, and then applied36 a roasting heat. The quicksilver turned to vapor37, escaped through the pipe into the pail, and the water turned it into good wholesome38 quicksilver again. Quicksilver is very costly39, and they never waste it. On opening the retort, there was our week’s work—a lump of pure white, frosty looking silver, twice as large as a man’s head. Perhaps a fifth of the mass was gold, but the color of it did not show—would not have shown if two thirds of it had been gold. We melted it up and made a solid brick of it by pouring it into an iron brick-mould.
By such a tedious and laborious process were silver bricks obtained. This mill was but one of many others in operation at the time. The first one in Nevada was built at Egan Canyon40 and was a small insignificant41 affair and compared most unfavorably with some of the immense establishments afterwards located at Virginia City and elsewhere.
From our bricks a little corner was chipped off for the “fire-assay”—a method used to determine the proportions of gold, silver and base metals in the mass. This is an interesting process. The chip is hammered out as thin as paper and weighed on scales so fine and sensitive that if you weigh a two-inch scrap42 of paper on them and then write your name on the paper with a course, soft pencil and weigh it again, the scales will take marked notice of the addition.
Then a little lead (also weighed) is rolled up with the flake43 of silver and the two are melted at a great heat in a small vessel44 called a cupel, made by compressing bone ashes into a cup-shape in a steel mold. The base metals oxydize and are absorbed with the lead into the pores of the cupel. A button or globule of perfectly45 pure gold and silver is left behind, and by weighing it and noting the loss, the assayer46 knows the proportion of base metal the brick contains. He has to separate the gold from the silver now. The button is hammered out flat and thin, put in the furnace and kept some time at a red heat; after cooling it off it is rolled up like a quill47 and heated in a glass vessel containing nitric acid; the acid dissolves the silver and leaves the gold pure and ready to be weighed on its own merits. Then salt water is poured into the vessel containing the dissolved silver and the silver returns to palpable form again and sinks to the bottom. Nothing now remains48 but to weigh it; then the proportions of the several metals contained in the brick are known, and the assayer stamps the value of the brick upon its surface.
The sagacious reader will know now, without being told, that the speculative49 miner, in getting a “fire-assay” made of a piece of rock from his mine (to help him sell the same), was not in the habit of picking out the least valuable fragment of rock on his dump-pile, but quite the contrary. I have seen men hunt over a pile of nearly worthless quartz for an hour, and at last find a little piece as large as a filbert, which was rich in gold and silver—and this was reserved for a fire-assay! Of course the fire-assay would demonstrate that a ton of such rock would yield hundreds of dollars—and on such assays50 many an utterly51 worthless mine was sold.
Assaying was a good business, and so some men engaged in it, occasionally, who were not strictly52 scientific and capable. One assayer got such rich results out of all specimens53 brought to him that in time he acquired almost a monopoly of the business. But like all men who achieve success, he became an object of envy and suspicion. The other assayers entered into a conspiracy54 against him, and let some prominent citizens into the secret in order to show that they meant fairly. Then they broke a little fragment off a carpenter’s grindstone and got a stranger to take it to the popular scientist and get it assayed. In the course of an hour the result came—whereby it appeared that a ton of that rock would yield $1,184.40 in silver and $366.36 in gold!
Due publication of the whole matter was made in the paper, and the popular assayer left town “between two days.”
I will remark, in passing, that I only remained in the milling business one week. I told my employer I could not stay longer without an advance in my wages; that I liked quartz milling, indeed was infatuated with it; that I had never before grown so tenderly attached to an occupation in so short a time; that nothing, it seemed to me, gave such scope to intellectual activity as feeding a battery and screening tailings, and nothing so stimulated55 the moral attributes as retorting bullion56 and washing blankets—still, I felt constrained57 to ask an increase of salary. He said he was paying me ten dollars a week, and thought it a good round sum. How much did I want?
I said about four hundred thousand dollars a month, and board, was about all I could reasonably ask, considering the hard times.
I was ordered off the premises58! And yet, when I look back to those days and call to mind the exceeding hardness of the labor7 I performed in that mill, I only regret that I did not ask him seven hundred thousand.
Shortly after this I began to grow crazy, along with the rest of the population, about the mysterious and wonderful “cement mine,” and to make preparations to take advantage of any opportunity that might offer to go and help hunt for it.
点击收听单词发音
1 dismal | |
adj.阴沉的,凄凉的,令人忧郁的,差劲的 | |
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2 burrow | |
vt.挖掘(洞穴);钻进;vi.挖洞;翻寻;n.地洞 | |
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3 bowels | |
n.肠,内脏,内部;肠( bowel的名词复数 );内部,最深处 | |
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4 coveted | |
adj.令人垂涎的;垂涎的,梦寐以求的v.贪求,觊觎(covet的过去分词);垂涎;贪图 | |
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5 burrowing | |
v.挖掘(洞穴),挖洞( burrow的现在分词 );翻寻 | |
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6 dreary | |
adj.令人沮丧的,沉闷的,单调乏味的 | |
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7 labor | |
n.劳动,努力,工作,劳工;分娩;vi.劳动,努力,苦干;vt.详细分析;麻烦 | |
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8 laborious | |
adj.吃力的,努力的,不流畅 | |
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9 ponderous | |
adj.沉重的,笨重的,(文章)冗长的 | |
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10 sledge | |
n.雪橇,大锤;v.用雪橇搬运,坐雪橇往 | |
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11 shovel | |
n.铁锨,铲子,一铲之量;v.铲,铲出 | |
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12 pulverized | |
adj.[医]雾化的,粉末状的v.将…弄碎( pulverize的过去式和过去分词 );将…弄成粉末或尘埃;摧毁;粉碎 | |
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13 trickled | |
v.滴( trickle的过去式和过去分词 );淌;使)慢慢走;缓慢移动 | |
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14 pulp | |
n.果肉,纸浆;v.化成纸浆,除去...果肉,制成纸浆 | |
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15 revolving | |
adj.旋转的,轮转式的;循环的v.(使)旋转( revolve的现在分词 );细想 | |
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16 liberated | |
a.无拘束的,放纵的 | |
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17 copper | |
n.铜;铜币;铜器;adj.铜(制)的;(紫)铜色的 | |
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18 amalgamation | |
n.合并,重组;;汞齐化 | |
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19 tiresome | |
adj.令人疲劳的,令人厌倦的 | |
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20 obstructing | |
阻塞( obstruct的现在分词 ); 堵塞; 阻碍; 阻止 | |
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21 eternity | |
n.不朽,来世;永恒,无穷 | |
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22 aggravating | |
adj.恼人的,讨厌的 | |
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23 quartz | |
n.石英 | |
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24 doom | |
n.厄运,劫数;v.注定,命定 | |
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25 scoop | |
n.铲子,舀取,独家新闻;v.汲取,舀取,抢先登出 | |
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26 digestion | |
n.消化,吸收 | |
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27 dint | |
n.由于,靠;凹坑 | |
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28 pebbles | |
[复数]鹅卵石; 沙砾; 卵石,小圆石( pebble的名词复数 ) | |
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29 machinery | |
n.(总称)机械,机器;机构 | |
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30 undesirable | |
adj.不受欢迎的,不良的,不合意的,讨厌的;n.不受欢迎的人,不良分子 | |
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31 imprisoned | |
下狱,监禁( imprison的过去式和过去分词 ) | |
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32 luxurious | |
adj.精美而昂贵的;豪华的 | |
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33 inspection | |
n.检查,审查,检阅 | |
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34 saturates | |
浸湿,浸透( saturate的第三人称单数 ); 使…大量吸收或充满某物 | |
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35 crumbled | |
(把…)弄碎, (使)碎成细屑( crumble的过去式和过去分词 ); 衰落; 坍塌; 损坏 | |
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36 applied | |
adj.应用的;v.应用,适用 | |
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37 vapor | |
n.蒸汽,雾气 | |
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38 wholesome | |
adj.适合;卫生的;有益健康的;显示身心健康的 | |
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39 costly | |
adj.昂贵的,价值高的,豪华的 | |
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40 canyon | |
n.峡谷,溪谷 | |
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41 insignificant | |
adj.无关紧要的,可忽略的,无意义的 | |
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42 scrap | |
n.碎片;废料;v.废弃,报废 | |
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43 flake | |
v.使成薄片;雪片般落下;n.薄片 | |
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44 vessel | |
n.船舶;容器,器皿;管,导管,血管 | |
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45 perfectly | |
adv.完美地,无可非议地,彻底地 | |
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46 assayer | |
n.试金者,分析专家 | |
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47 quill | |
n.羽毛管;v.给(织物或衣服)作皱褶 | |
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48 remains | |
n.剩余物,残留物;遗体,遗迹 | |
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49 speculative | |
adj.思索性的,暝想性的,推理的 | |
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50 assays | |
n.化验( assay的名词复数 );试验;尝试;试金 | |
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51 utterly | |
adv.完全地,绝对地 | |
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52 strictly | |
adv.严厉地,严格地;严密地 | |
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53 specimens | |
n.样品( specimen的名词复数 );范例;(化验的)抽样;某种类型的人 | |
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54 conspiracy | |
n.阴谋,密谋,共谋 | |
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55 stimulated | |
a.刺激的 | |
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56 bullion | |
n.金条,银条 | |
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57 constrained | |
adj.束缚的,节制的 | |
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58 premises | |
n.建筑物,房屋 | |
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