816.4 Pierre-Élisabeth de FONTANIEU. The art of making coloured crystals to imitate precious stones, translated from the French of mons. Fontanieu... to which are added many explanatory notes; and a short account of the nature and compositions of true gems, with the method to distinguish them from the factitious; also, a new theory of phlogiston, electric fluid, etc by William Drew. 8° London: printed for the author, at the Literary Press 1787 Nat Union Cat