第548章:算学天文书并立
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《三国:刘封传》
第548章:算学天文书并立
太极殿内,朝会已过三刻。众臣按班侍立,殿中鸦雀无声,只余漏壶滴水轻响。
刘封高坐御案之后,目光扫过阶下群臣,忽而开口,声如沉钟:“裴卿,你将格物院所陈之事,再与诸卿说一遍。“
裴秀出班,手捧一卷竹简,躬身道:“臣奉旨领格物院事,整顿分科。今拟算学、天文二科,与原有农、工、医三科并立,共为五科。各科设博士一人,助教二人,生徒定额二十人。“
此言一出,殿中顿时起了细微骚动。太常卿郑冲须发皆白,颤巍巍出列奏道:“陛下,天文历法,向属太史令职掌;算学杂术,旧附九章之末。今设专科学官,且与农工并列,臣恐有紊旧制。“
刘封食指轻叩御案:“郑卿所言,以何为据?“
郑冲拱手:“《周礼》有云:保氏掌养国子,教之六艺。六艺之中,礼乐射御书数,数居末位。盖其艺虽有用,终非大道。至于天文,太史掌之,以奉天时,本非教学之业。今一立为科,臣恐士子舍本逐末。“
话音方落,杜预淡然一笑,跨步出列:“郑公之言差矣。昔日孔子删《诗》《书》,定《礼》《乐》,赞《周易》,修《春秋》,却不曾废九数。六艺之传,本有算法。周公制礼,设官分职,保氏所教,原为诸艺通行,非独贵经术而贱数理。“
郑冲面色微沉:“杜侍郎是要以杂术比于经术?“
杜预不卑不亢:“臣只知事理。今陛下命臣修《通典》,考历代制度沿革。秦汉以来,算学用以造历、均输、平籴、治水、筑城,天文用以观象、授时、定节气、辨方位。若无算学,则丈量田亩无准,计粮运筹无法;若无天文,则农时舛错,祭祀失序。此二者非杂术,乃经世致用之实学。“
刘封颔首,目光扫向裴秀:“裴卿,你且将格物院所考历代算家名录,报与诸卿听。“
裴秀展开竹简,朗声道:“三代以上,羲和造历,算学肇其端。商高以勾股测天地,祖冲之精推圆周,张衡作浑天,蔡邕定律数。若算学为杂术,何以数千年帝王皆用之?若天文为末技,何以历代明君皆重之?“
尚书令蒋琬微微点头,出班附议:“陛下,臣以为裴侍郎所言甚当。今陛下设科分学,非废经术,乃补旧制之不足。汉初设五经博士,至今学者偏于一隅,于军国实用之学往往茫然。今算学天文立科,正可培植通才,以备朝廷任使。“
郑冲仍欲辩驳,刘封抬手止住:“郑卿,朕知你忧虑经术衰微。然天下事,非独经术可了。朕问你,今岁关中修筑郑白渠,测量地势远近高低,若不通算学,如何定工?新造浑天仪测星度,若不通天文,如何合象?“
郑冲语塞,半晌才道:“臣非谓此学无用,但恐**过隆,使士人弃大道而趋小术。“
刘封缓缓起身,负手踱步阶前:“朕出身行伍,深知军中一弩一矢,皆需工匠精算斤两;一砲一车,皆需度长短准。昔诸葛丞相造木牛流马,若无算学精研,何以运粮千里?张衡浑天,若无天文实测,何以定二十四节气?朕设立格物院,分科治学,正是要让天下士子明白,治国非唯诵经,兴邦尚需实学。“
他顿了顿,目光沉毅:“郑卿,朕问你,秦汉以来,治经术者何止千百,能比肩孔孟者几人?而算学一途,商高勾股定理至今仍为营造圭臬,祖氏圆周之术经年不改。此非大道乎?“
郑冲汗流浃背,退归班列。
刘封回身坐定,手指御案上的《格物院科制疏》:“准奏。算学科,裴秀领博士,教授九章算术、海岛算经、缉古算经,兼习测量测绘之术。天文科,杜预兼领博士,教授浑天仪法、星象纪要、授时历算,兼习观象测星之技。二科生徒,三年一考,优者录为太史令、少府属官,或拨入工部、将作监任职。“
他目光转向裴秀,语气骤然一转:“裴卿,朕闻格物院中有人议论,谓天文星象关乎国运,不可轻授于寒门子弟?“
裴秀面色微变,拱手道:“确有此类言语。臣已斥其谬,但风气未净。“
刘封冷笑一声:“什么国运星象?朕登基以来,每逢朔望皆观天象,未曾见哪颗星说了哪句话。天文之学,观日月行度,定四时节气,此为实学。若有人借星象妖言惑众,着御史台严查。天文科生徒,只考实测推算,不准讲谶纬休咎。“
殿中又是一静。刘封这番话,等于将天文从神秘之学拉回了实用之术,彻底斩断了借天象干政的旧路。
姜维出班,沉声道:“陛下圣明。臣领兵多年,深知征战之际,若通晓天文,可观风云变化预判敌情;若通晓算学,可精确计算粮草辎重。昔年上方谷一战,若非诸葛亮算准天时,怎敢设伏司马懿?微臣以为,此二科非但于国有利,于军更有大用。“
刘封颔首:“姜卿所言极是。着兵部与格物院
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