第四十一章 聚雷瓶？超脑成败的关键
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青儿轻轻拨动着可以上下活动的空心圆珠，目中也是一片疑惑，饶是她天资聪颖，博览群书，也不识得这是何种器具。龙腾小说网ltxsba.com
“此物名叫‘算盘’，是……是我特制的计算工具。”已经习惯“剽窃”事业的张紫星说谎的时候连脸都不红一下，“如今《天算》一书名动天下，众人术算能力也在日益提高，但以算筹作为计算工具实在有所不便，因此我苦思多年，近日终于造出此物，不敢藏私，特来与小姐分享。”
历史上，在算盘发明以前，人们一直用小木棍进行计算，这些小木棍叫“算筹”，用算筹作为工具进行的计算叫“筹算”，这也是以《九章算术》为蓝本的《天算》中所记载的计算工具，如今随着算术的普及，人们的计算能力也在渐渐提高，用算筹已经无法满足需求，于是，张紫星及时地推出了算盘这个“提前产物”。（也有传说是黄帝手下隶首发明，在此忽略。）
在青儿和邓蝉玉好奇的注视下，张紫星一边演示，一边讲解珠算的概念、口诀和用法。青儿一听这算盘是紫星先生苦思多年才发明的新计算工具，表情立刻变得严肃起来，聚精会神地听着他的讲解，生怕漏过一个字。邓蝉玉虽然不似青儿那样好学多才，但也有一定的术算能力，尤其对这件新事物很感兴趣，因此也听得颇为用心。
张紫星才说完珠算口诀，邓蝉玉就一把抢过算盘，开始凭着记忆的口诀操作了起来，与普通的算术相印证，随着一次次尝试的成功，脸上惊喜之色愈浓：“七一下加三、七二下加六……我知道了！”
青儿的数学知识比邓蝉玉要高明得多，对于算盘的理解也更深一些，自然也很想操作一番，可惜算盘只有一副，又不好和邓蝉玉争夺，目光不由黯淡。张紫星知道她的心情，一边详细讲解珠算知识，一边承诺明天再做几副算盘送来，才让她心情有所好转。
“小贼，姐姐说得没错，看不出你还真有点才学。”邓蝉玉玩得有些上瘾，对张紫星的印象也渐渐好转，从她的表情看，“有点才学”已经是给某人相当高的评价了。
青儿明白算盘问世的重大意义，肃容而起，朝张紫星行了个大礼：“先生所制此物能化繁为简，大大提高计算的速度和准度，意义之重大，可谓继往开来，青儿代天下所有研习术算的同好谢过先生！”
张紫星连忙还礼道：“闻听小姐之父与朝中官员有旧，可否请小姐令尊将此物献与朝廷，使算盘能迅速普及天下，物尽其用。”
青儿面露惊喜：“先生有此心意，青儿自当尽力而为，当今天子乃大智圣人，自然明白算盘之重要，届时必有嘉奖，青儿在此先恭喜先生了。”
张紫星摇摇头，说出一句大让两女意外的话来：“我请小姐令尊将算盘转献朝廷，只有一个条件，那就是绝对不能透露这算盘是我发明的……”
“为什么？这可是一个好机会啊！”连邓蝉玉都感到不可思议，她前几天来的时候就听青儿说过紫星先生“没落贵族”的身份：“原以为你这小贼有才，却不料是个蠢人，若能得到天子赏识，当可重振家业，安享荣华富贵，为何要如此？”
“富贵名利只是过眼云烟，那种勾心斗角、如履薄冰的日子哪比得上闲云野鹤来得自在？”张紫星朝邓蝉玉微微一笑，露出一副淡然的表情，邓蝉玉目光闪烁，居然没有再出言讽刺。
张紫星忽然想起，封神演义里很多仙人异士在出场或者开打的时候似乎都喜欢作歌云云，于是在超脑数据库中拉出唐代诗人孟郊的《隐士》中的一段来。某人深吸一口气，双目遥天边，脸上露出恬静的微笑，看上去竟然有几分出尘之相，低声吟道：“且听我作歌一首：宝玉忌出璞，出璞先为尘。松柏忌出山，出山先为薪。君子隐石壁，道书为我邻。寝兴思其义，澹泊味始真。”
当他很骚包地将这剽窃的诗句念完后，眼角偷偷瞄向两女，果然就看到她们眼中洋溢的钦佩之色，连邓蝉玉都不例外，不由大为得意。
孟郊的《隐士》果然不凡，两位小姐顿时被这位紫星先生的文采与气节所折服，尤其邓蝉玉对他的印象大为改观。
青儿自上次推荐张紫星为官的建议被拒绝后，已经知道这位奇才是个“淡泊名利”的高人，因此并不在这个问题上多劝：“先生乃高人隐士，青儿佩服，但将算盘献上后，朝中必会追问此物来源，青儿当何以对？不如我替先生引荐家父，由家父定夺如何？”
见你老爸？你那老爸可是本散人手下的第一文臣，除非学你蒙个面纱，不然身份还不立刻穿帮？张紫星连忙拒绝：“此事实则易尔，青儿小姐就说算盘是你所制……”
“这如何使得！”青儿立刻明白了他的意思，断然拒绝：“先生莫非要陷阱青儿于不义？青儿虽不才，也不能做如此无耻之事！”
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