Dictionarium Polygraphicum. Aurum musicum, aurum musivum.

Dictionarium Polygraphicum:
Or, The Whole Body of Arts Regularly Digested.
Vol I.
London: Printed for C. Hitch and C. Davis in Pater-noster Row, and S. Austen in St. Paul's Church Yard. MDCCXXXV.

AURUM MUSICUM, AURUM MUSIVUM, a sort of liquid gold for writing;

Take fine crystal and orpiment of each one ounce, pound them severally, till they are reduced to a very fine powder, then grind them together well with glair.

With this you may write either with pen or pencil, and the letter or draught will be of a good gold colour.

Another way of making the same.
Take of the best English tin, an ounce, and of the best spanish quicksilver the same quantity: make of them an amalgama, by putting the crude mercury to the melted tin, and stirring together; then reduce them by pounding into a fine powder, and mix them with flowers of sal armoniack, and flowers of sulphur, of each an ounce: calcine gently, till the sulphur is consum’d, and so will the Aurum [gold] stick to the upper crust or scoria.

This being finely powder'd, and ground with glair, will with pen or pencil give your figure or picture a golden colour. See 2d. Ed. Pharm. Bat.

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