第57章 圆周率和游标卡尺

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    东方明接过这一捧简牍开始翻阅,只看了一卷,便已经心中了然,抬头看了看刘歆,结合脑中的历史知识,已经知道他想问的是什么了。
    刘歆见他放下简牍,正要开口,东方明摆了摆手制止了他的问话,说道:
    “刘大人想问的莫非是圆率?”
    刘歆脸上顿时出现了惊讶的神色,就连一旁的刘向和扬雄神色也是一变。
    “正是,东方先生莫非精于此道?”
    东方明知道历史上刘歆除了修订山海经外也曾经计算过圆周率,而且还小有成就,但不记得他算的数值是多少,但想来不会达到3.14那么精确,而且自己也不适合透露太多,于是问道:
    “敢问刘大人多年来算的如何?算到了的是三又一五还是三又一六?”
    刘歆一听此言,已经知道这次考核不需要再进行了,而且自己只怕还要向对方请教。
    “数值每次都不太一样,分的越细,误差反而越大。”
    东方明心中了然,知道刘歆必是使用的分割法,将圆周用多边形分割,分边数的越多,自然越接近圆周,估计是测量工具粗糙,所以算不出太精确的数值。
    他正想卖弄一番,忽然心中一动,想到了那把密码锁,还是先搞清楚他为什么要算圆周率再说,于是说道:“在下虽然愚鲁,奈何恩师精于此道,我耳濡目染,到也略懂些皮毛,只是不知道大人计算着这圆率有何意义?”
    此问一出,刘向父子和扬雄的脸色都有些尴尬,三人互相对视,都皱了皱眉,似乎在犹豫着是否要告诉东方明。
    殿内一时间陷入了尴尬,良久,刘向拍了拍刘歆肩头,说道:“反正这位东方贤契也知道天谕阁之事,便大致和他说说也是无妨。”
    刘歆冲父亲点了点头,对东方明正色道:
    “实不相瞒,这数字涉及天谕阁一把秘钥,所以我才穷数载之功,欲得几位精确结果。若是先生懂得此道,还望不吝赐教。”
    东方明顿时明白了八九分,估计是天谕阁中也有密码锁之类的东西,弄不好还可能与天书有关,幸亏自己刚才没有直接告诉他数值。
    想到这儿,他故作深沉的摇摇头,缓缓说道:
    “赐教万不敢当,在下的恩师昔日经常演算,我却从没记住过结果,不过刚才翻阅刘大人的手札,家师的演算方法与大人如出一辙,只是所用的测量用具更为精确。”
    刘歆眼睛一亮,他浸淫圆率数年,知道按照自己的方法,精确的测量工具才是最重要的,于是对着东方明深施一礼。
    “不知用何物测量能够更加精确,还请东方先生教我,下官感激不尽。”
    东方明赶忙站起身来微笑还礼,说道:“雕虫小技,原本也不值得藏私,既然大人不耻下问,烦请取纸笔来。”
    刘歆赶紧吩咐人准备,不一会儿,博士官捧着笔砚进来,居然还有一沓当时极为稀缺珍贵的纸张。
    东方明提笔在手思索片刻,开始仔细绘图,不大一会儿,一个游标卡尺的图纸便跃然纸上。
    他出身铸剑世家,游标卡尺几乎是现代铸剑必备之物,尤其是手柄和护手的安装调教,为求工艺的尽善尽美,经常要用到卡尺来做微调,因此对游标卡尺的结构再熟悉不过,只需要把刻度换成刘歆熟悉的汉代刻度即可。
    他拿着图纸向刘歆详细解说了卡尺结构和制作要求,刘歆听得频频点头,一旁的刘向和扬雄也是大为佩服。
    此时大殿的耳室中,放才在后面凉亭弈棋的一男一女看着殿中发生的一切,脸上不由得露出了会心的笑意。
    ……
    从太学出来,已经是申牌时分,王莽安排了马车在门口接着东方明,侍从过来殷勤的接过了他的大黑马,拴在车辕上。
    登上马车,东方明才惊讶的发现蝶儿也在车上,看来是一直在等他,好在和蝶儿已经熟了,也不觉得拘束,车把势甩了个响鞭,往城内行去。
    一路安静,蝶儿却噗哧一声笑了出来,笑容里满是得意的神色。东方明好奇问道:“什么事情这么好笑?”
    蝶儿抚胸微喘,平息一阵后说道:“我笑那个娘娘腔世子,装腔作势的,还不是被咱们打跑了,你说我今天在马上那招耍的漂亮不?”
    “漂亮!漂亮的很。”东方明望着窗外,脑子里还在想着天谕阁的事情,有一搭没一搭的应着。
    “侯爷说得哪里话来,此事也怪晚辈莽撞,不过是些许误会,手下人受点轻伤而已,侯爷不必费心!”蝶儿学着刘欣当时的口气说着,忍不住又抿唇笑了起来。
    东方明皱了皱眉说道:
    “今天还多亏了你,不然我和夏侯杰很可能吃亏,那家伙武功不弱,我估计不是他的对手,你以后也切莫招惹他,更何况他还是个世子,真惹了祸,新都侯也不好收拾。”
    蝶儿听东方明夸刘欣武功高强本有些不服,不过听了后面
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