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POure hot water on calx vive, shake it, coole and settle, filtrate the water, and distill it hot into Flint-ashes, which if this be setled, then filter it. In this lie made of Calx vive, and ashes of Flints, Mercury must be boyled a sixth or seventh time, and that which boyleth away, must be applyed with fresh Lixivium. In like manner let Mercury be boyled a fourth time in salt and distill'd Vineger, so that the salt be covered with blackness, and the Vineger being evapora∣ted, fresh Vineger to be poured on: At last let it be wash'd a third time with hot wa∣ter, and dryed, then it is fit for subliming, praecipitating, and for other businesses.