Lac Gum is a very singular compound, prepared by the female of a very minute insect, the Coccus lacca, found on some trees in the Last Indies, particularly the banyan fig. The insect is nourished by the tree, fixing itself upon the twigs and extremities of the succulent branches, where it deposits its eggs, which it glues to the branch by a red liquid, the outside of which hardens by the air, and serves as a cell to the parent insect. This increases in size, and the young insects at first feed upon the enclosed liquid, and after this is expended, they eat through the coat, leaving a hollow red resinous bag, which is stick lac. The best lac is procured from the province of Acham (or Assam), but it is obtained in great plenty on the uncultivated mountains on each side of the Ganges. There are three kinds of lac - viz., stick lac, which is lac in its natural state, without any preparation ; seed lac, which is stick lac broken into small lumps and granulated; and shellac, which is a preparation of the stick lac. By a number of very accurate experments made by Air. Hatchett, it is found that lac consists of a colouring extract of resin, gluten, and wax, all of them in intimate combination. Lac is employed for a variety of purposes in the arts; the finer specimens are cut into beads far necklaces. It enters largely into the composition of sealing wax, and hard japans or varnishes, and it is much used in dyeing.