Manly P. Hall Collection, Box 10

reddened in the fire before putting the zinc in. As soon as it is melted, you remove it from the fire and let it cool until, if you plunge a straw into it, it does not ignite. In this state, you pour it from a great height onto a very clean floor, one drop here and one drop there, or to do better, pour it from a sufficient height onto an inverted marble mortar so that it scatters better. Alternatively, you can pour it into a bucket or bowl filled with lukewarm water, taking care to place a new broom broom—not dry, that is to say green, which is not wet and does not touch the water in the bucket—across the said bucket, always observing to pour it little by little and at the same degree of heat as above. All these precautions are necessary.

Reduction of zinc flowers into mineral salt.

Take your very white zinc flowers, grind them well in a glass mortar, pass them through a silk sieve, and place them on a glass exposed to the dew of March, from the first quarter until the beginning of the last, or during all the equinoxes. Your glass must be tilted so that there is a receiver underneath to receive the liquid that will fall by deliquium Liquefaction caused by absorbing atmospheric moisture.. Place your material sheltered from rain and sun. Collect exactly the water that will be in the receiver, and the residue of the flowers that will be on the glass; put everything into a glass retort and distill over a graduated, closed reverberatory furnace A furnace that reflects heat onto the vessel. until no more liquid comes out, having first well-luted the