取一长约近尺的大葱叶洗净晾干,取明矾(白矾)若干敲成颗粒状,塞入圆筒状的葱叶内,葱叶两头打结。然后,将塞有明矾的葱叶放在尚有余火的草木灰上,不停地翻动葱叶,待葱叶汁耗尽由青转黄接近微焦时,吹去葱叶上的浮灰,用擀面杖将装有明矾的微焦葱叶擀成粉状(以下简称“葱矾粉”),装入瓶中备用。治疗中耳炎时,先用酒精棉棒除去耳中脓 Take a length of about scallion leaves scallion washed to dry, take alum (alum) knocked into a number of particles, into cylindrical cylindrical onion, onion leaf knot at both ends. Then, will be stuffed with alum leaves on the ash still have fire, constantly turning onion, until the verdant juice depleted by the green to yellow close to the micro-focus, the blown onions on the fly, with Rolling pin will be filled with alum micro-focus onion spring roll into a powder (hereinafter referred to as “onion powder”), into the bottle spare. Treatment of otitis media, the first with alcohol cotton swab to remove ear pus