Manly P. Hall Collection, Box 10

preferable to any other). Everything must be done with accuracy and cleanliness; this salt, being thus purified and talc-like, is very light and has the brilliance of the finest oriental pearls.

All metallic limes (oxides) can be turned into salt by this way, provided that they have been well destroyed by fire. One uses that of zinc by preference over any other mineral because it is found totally destroyed and cannot be reduced into a body by any art.

It must be noted that by distilling the previously purified liquid, which is the lime of zinc dissolved in the air, a burning spirit passes in the boiling water bath as subtle as spirits of wine, which one must guard carefully because it has very great virtues. It is, strictly speaking, a universal spirit determined to the metallic.

Good method of attracting much of this universal spirit and at the same time purifying the alkali and central salt of zinc.

Take the rainwater of the equinoxes or May dew and distill it in this way: put, for example, one hundred pints into an alembic An apparatus for distillation., distill off half. Take this distilled half and re-distill it a second time, but distill only half of it, that is to say, 25 pints. Distill these 25 pints again and withdraw only 12 pints from them. Then put your zinc salt after the simple and first crystallization, which