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第151章 明天继续(1 / 2)

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院外的土灶已经垒好,大铁锅稳稳当当地架在上面。周桐擦了把汗,看着这个临时搭建的"实验台",心里总算踏实了几分。

"嬷嬷,咱家上有没有细密些的布料?"周桐比划着,"最好是能透水又不漏渣的那种。"

陈嬷嬷思索片刻:"老身那儿有几匹做里衣的细棉布,倒是合用。"

"太好了!"周桐眼睛一亮,"再准备些细沙、小石子......对了,还有木炭!"

老王正抱着一捆柴火过来,闻言诧异道:"少爷要木炭作甚?难不成要烤肉?"

"过滤用!"周桐兴奋地解释,"木炭能吸附杂质......呃,就是能让水变干净。"他暗自庆幸还记得这点化学知识,虽然不知道木炭屑和活性炭效果差多少,但总比没有强。

三人忙活了一下午,终于搭好了一个简易过滤装置:最下层铺细棉布,往上依次是木炭屑、细沙和小石子,再用竹筐固定成型。周桐看着这个歪歪扭扭的装置,虽然比不上现代过滤器,但在这个时代已经算是"高科技"了。

夕阳西下,周桐擦了擦满手的炭灰:"先吃饭吧,这活儿干得我都没胃口了。"

回到小院,徐巧已经摆好了饭菜。周桐却拉着老王和大虎他们,端着碗就要往偏厅走:"我们身上有味,就在旁边吃吧。"

徐巧哭笑不得地拦住他们:"哪有这样的道理?都过来坐。"

"不行不行,"周桐连连摆手,"万一沾到菜上......"

小桃正扒着饭,闻言嘀咕道:"少爷前些日子炼铁弄得一身伤,现在又要弄得一身臭......"

周桐眉头一挑:"小桃啊——"

小桃立刻埋头扒饭,假装自己不存在。

"晚上你也来帮忙,"周桐笑眯眯地说,"正好让你见识见识什么叫'科学实验'。"

小桃的筷子僵在半空,哭丧着脸看向徐巧:"巧儿姐......"

徐巧忍笑给她夹了块肉:"吃饭。"

饭桌上,周桐一边扒饭一边盘算着晚上的提纯大计。木炭的吸附效果、煮沸的温度控制、结晶的时间......这些在现代实验室里简单至极的操作,放在古代却成了难题。

"少爷,"老王突然凑过来小声问,"您真要带小桃那丫头一起弄?万一她毛手毛脚的......"

周桐神秘一笑:"正好让她长长记性,看以后还敢不敢乱说话。"

夜风微凉,周桐选了个顺风的位置搭建实验场地,免得臭味飘进院子。小桃被硬拉过来,哭丧着脸抱着木盆站在一旁。

"分工!"周桐拍了拍手,"老王负责烧火,大虎二虎负责搬运硝石和水,嬷嬷负责过滤,小桃......"他瞥了眼满脸不情愿的小丫头,"你就负责递工具吧。"

"少爷偏心!"小桃撅着嘴,"凭什么我就干这点活儿?"

"那你想干什么?"周桐挑眉,"去捞锅里的臭水?"

小桃立刻缩了缩脖子,不吭声了。

实验正式开始。大虎将一筐硝石倒入沸水中,灰白的晶体渐渐溶解,水面浮起一层泡沫和杂质,散发出一股刺鼻的氨味。

"呕——"二壮第一个没忍住,干呕着退开两步。

"坚持住!"周桐捏着鼻子指挥,"老王,火小一点!温度太高会把有用的成分也蒸发掉!"

老王赶紧撤了几根柴火。

待硝石完全溶解,周桐让大虎将浑浊的液体舀入过滤装置。褐色的液体缓缓流过木炭层,颜色果然变浅了些,但依然浑浊。

"效果不太理想啊......"周桐皱眉,"是不是木炭颗粒太大,吸附不够充分。"

陈嬷嬷提议:"要不老身再加一层细布?"

"试试看。"

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