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咖啡豆的鑒別：大豆與小豆的特點

咖啡豆並不見得豆大就一定是好豆，豆小一定是壞豆。豆粒的大小和咖啡味道的優劣與否，並沒有很大的關系。不過，外觀上的優勢在交易時比較有利，而豆子的大小，也確實是等級上的一個標准。例如哥倫比亞、巴西、坦桑尼亞等多數國家，豆子的大小，是決定豆子等級的一個要素。

在哥倫比亞及巴西，利用篩子來分出大小。特別是哥倫比亞，光從外觀的大小就分有等級。哥倫比亞、斯普雷蒙是SCREENl7～18的等級。所謂的SCREEN，是分成幾階段的大小基准。在底部有規定尺寸的洞來過篩，將咖啡生豆放入，依可以通過洞的豆和不通過洞的豆來依次分出大小。

一般的咖啡豆爲平豆，SCREEN爲14～17，一棵咖啡樹所采集的豆子中，約占80％。若要舉出豆子大小極端的例子，有圓豆及巨大豆等。

圓豆的形狀是小而圓的豆子，通常生于咖啡樹的前端，可能是因爲養分無法到達，或是應該長成2粒的豆子變成1粒，所以豆子是渾圓的，由于量少，有些會相當受珍視。各國出産的圓豆味道各異，一般而言，圓豆香味都不錯。

巨大豆的大小約是一般咖啡豆的2倍，在通過SCREEN時有時也會掉落，但也有一種屬于阿拉比卡種的巨大豆，樹和葉皆大，果實也是相當巨大。這種豆産于墨西哥等地，兩者皆被當爲珍品。煎焙過的豆子味道濃厚但沒有什麽特征，且因煎焙方式的不同，也可以做出風味佳的咖啡。

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"We walked by the side of our teams or behind the wagons, we slept on the ground at night, we did our own cooking, we washed our knives by sticking them into the ground rapidly a few times, and we washed our plates with sand and wisps of grass. When we stopped, we arranged our wagons in a circle, and thus formed a 'corral,' or yard, where we drove our oxen to yoke them up. And the corral was often very useful as a fort, or camp, for defending ourselves against the Indians. Do you see that little hollow down there?" he asked, pointing to a depression in the ground a short distance to the right of the train. "Well, in that hollow our wagon-train was kept three days and nights by the Indians. Three days and nights they stayed around, and made several attacks. Two of our men were killed and three were wounded by their arrows, and others had narrow escapes. One arrow hit me on the throat, but I was saved by the knot of my neckerchief, and the point only tore the skin a little. Since that time I have always had a fondness for large neckties. I don't know how many of the Indians we killed, as they carried off their dead and wounded, to save them from being scalped. Next to getting the scalps of their enemies, the most important thing with the Indians is to save their own. We had several fights during our journey, but that one was the worst. Once a little party of us were surrounded in a small 'wallow,' and had a tough time to defend ourselves successfully. Luckily for us, the Indians had no fire-arms then, and their bows and arrows were no match for our rifles. Nowadays they are well armed, but there are[Pg 41] not so many of them, and they are not inclined to trouble the railway trains. They used to do a great deal of mischief in the old times, and many a poor fellow has been killed by them." The boys looked in the direction indicated, but could see nothing. This is not surprising, when we remember that sailors' eyes are accustomed to great distances, and can frequently see objects distinctly long before landsmen can make them out. Mr. Charlton's melancholy eyes seemed to be fixed on space. Just for the moment he had forgotten that he was not alone. Lawrence gave a sympathetic cough. As a matter of fact, he had not yet explained what he was doing there, and the longer the explanation was postponed the better he would be pleased. "You see our patient has gone," Balmayne said smoothly. "As a matter of fact, the whole thing was a ridiculous mistake. But you must not blame us. The blame is due to the charming young lady who sent for you. But that is one of the drawbacks of your noble profession. Goodnight." In one of the inmost circles, a sacred elephant had gone must, breaking his ropes, and confined now by only one leg. The chains fastened round his feet as soon as he showed the first symptoms of madness were lying broken in heaps on the ground. The brute had demolished the walls of his stable and then two sheds that happened to be in his way; now he was stamping a dance, every muscle in incessant motion, half swallowing his trunk, flinging straw in every direction, and finally heaping it on his head. A mob of people stood gazing from a distance, laughing at his heavy, clumsy movements; at the least step forward they[Pg 113] huddled back to fly, extending the circle, but still staring at the patient. In an adjoining stable were two more elephants very well cared for, the V neatly painted in red and white on their trunks, quietly eating and turning round only at the bidding of the driver; but one of them shed tears. The rajah's sleeping-room has at one end a dais ascended by three steps; here the sovereign's bed used to be spread; and here, now, the judges of the Supreme Court have their seats. In the middle of the room was a confused array of benches and tables, and against the walls, also washed with yellow, hung a series of portraits of bewigged worthies. No new clues offered themselves. He detached one of the hard, adhering chunks of gum and dropped it into his pocket, “just in case,” he said, half-grinning, “just in case they transfer themselves somewhere else. I’ll leave twenty-nine of them—and see.” The Lieutenant and Si and Shorty tried to make themselves believe that the noise was receding, showing that the rebels were being driven. At times it certainly was so, and then again it would burst out, Naturally, the boys were big-eyed all the time with the sights that filled the landscape near and far. Wherever they looked they were astonished, and when in a march they came out on a crest that commanded a wide view, they could not help halting, to drink all its wonders in. Even the experienced Si and Shorty were as full of amazement as they, and watched with fascination the spectacle of mighty preparation and concentrated power. "It has a great deal to do with this lecture with which you have favored us," answered the Major dryly. "But we'll not discuss that in open court. Are you through with the witness, Judge-Advocate? If so, call the next." "But I'm not going to leave you alone to brood," Albin said. "Because I'm your friend. And brooding isn't good for you. It's brooding that's got you into such a state—where you worry about growing things, for God's sake, and about freedom and silly things like that." Albin grinned. "What you've got to do is stop worrying, and I know how to get you to do that, kiddo. I really do." "Where may I learn the others?" But Gornom didn't answer, and Cadnan's breathing-space was over. He had to be back at the board, pushing buttons, watching carefully. Gornom stood behind him, peering over his shoulder with a cloudy eye. 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