Gall-Nuts. The gall-nuts used in making ink are produced by the insect which punctures the leaves of a species of oak very common in Asia Minor, where they are collected in considerable quantities by the poorer inhabitants: from the different ports of the Levant they are exported to various parts of the world. The galls held in the greatest estimation are those known in commerce under the name of blue galls. These are the produce of the first gathering, before the fly has issued from the gall.