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FIrst, let the Tartar be well calcined, to acquire to it an acrimony; then let it be dissolv'd in warme water. Poure out the water, the earth will settle to the bottom: If any acrimony should yet be in the Tartar, then poure water on again, which being se∣parated
must be put to the other; which must be continued as long as there is any acrimo∣ny in it: Put away the dead earth. These ga∣thered waters must be boiled away, there remaineth a sharp and fiery salt in the bot∣tom.
℞. Of this salt ℥ iii. boile it in a pint of water, put to it of crude Antimony ℥ ss. boile it well in a pann, as hard egs are boiled, and the water be clear: If the matter congea∣leth, looking like a red gelly; put to it a sufficient quantity of distill'd Vinegar, sepa∣rate the Tartar and all malignity of Anti∣mony from the redness, and dissolve it. That redness of Antimony setleth to the bottom, Filter it is paper, the redness of Antimony abides about the Paper. Dulcifie this red∣ness by pouring on warm water, and take off all superfluous impurities, let it settle, the redness being on the bottome, separate the water. Then exiccate on quick coales: its dose is halfe a graine.