求次气法
太乙金镜式经 · section 6 · 王希明 奉敕撰 · 613 characters
Original text
置天正冬至大小余每气加一十五日余七十三千五秒满二十四从小余一满气法从大余满纪法去之即次气大小余也
求加时法 先置半辰法之数一千三百四十一以十二小分之四半以夏至小余加之满法而一所得为辰数命甲子筭外则气应加时也不尽以三乘之辰法而一得数命为一辰中孟仲季数也
求太乙冬夏至入纪 阳遁太乙冬至起干隂遁太乙夏至起巽凡一百八十二日三万二千二百九十三分日之二万三十五为太乙变行
推冬至太乙加时变行 臣希明按张良云太神变顺气为余今置上元所求年天正积日及小余先加半辰法以辰法除之得为加时辰数及置积日减一以十二乘之幷加时辰数为天正时实以周纪法去之不尽为入纪实置入纪实以太乙周法去之余者以三约之为宫数不尽为入宫时数命起第一宫顺行八宫不游中五筭外即天正加时太乙所在宫也
推太乙夏至加时所在变行 置天正积日及小余秒加阳遁一百八十二日三万二千二百九十三分日之二万三十五为小余秒满秒法从小余一不尽为秒其小余先加半辰法以辰法除之为加时辰数 乃置积日减一以十二乘之幷入加时辰数为夏至加时实亦以周纪除之不尽为入纪实置入纪实以太乙周法二十四去之不尽以三约之为宫数不满为入宫时数命起一宫顺行八宫不游中五筭外则为隂遁太乙变行也
推冬夏二至以后太乙所在法 置冬夏二至以来幷今日所求日减一以十二乘之先加冬夏二至时数并今加所求时数为冬夏二至后时实以太乙周法二十四去之不尽者以三约之为宫数不满为入宫时数阳遁命起一宫顺八宫不游中五筭外即太乙所在宫隂遁命起九宫行八宫三时一移不游中五筭外即隂遁太乙所在宫也
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