a name by which the Italians call a sea-green colour in artificial crystal. To prepare this colour, you must have in the furnace a pot filled with 40 lbs. of good crystal, first carefully skimmed, boiled, and purified, without any manganese; then you must have twelve ounces of the powder of small leaves of copper thrice calcined, and half an ounce of saltrire in powder; mix them together; and pat them at four times into the pot, that they may the better mix with the gliss; stirring them well each time of putting in the powder, lest the mixture should swell and run over.