A resinous substance found on certain trees in different pacts of the East. Indies. It is produced by punctures made by a very small insect called Coccus lacca. These insects live on the sap of the trees, and soon become fixed to the branches by the juices which ooze out. « The twigs containing the deposit are broken off, and form the stick-lac of commerce. Seed-lac is the deposit broken off from the twigs, while shell-lat is obtained by placing the twigs in hot water, which melts off the gum. It is then purified by straining through cotton bags, and dried On strips of wood. The water in which the lac has been melted is colored red by the bodies of the insects, and after the melted lac is taken out this water is strained and evaporated, and the sediment is cut up into small cakes and sold as lac-dye. Lac-dye is largely used in dyeing silk and wool. Shell-lac is used in the manufacture of hats to stiffen the calico frame, and in making sealing-wax and different kinds of varnish - "Lac" is the same as the numeral lakh - a hundred thousand - and is indicative of the countless hosts of the lac insects.