"Not quite the same," was the reply, although both are produced by the same insect. This is what one of our English books says of them: 'When the acorn itself is wounded, it becomes a kind of monstrosity, and remains on the stalk like an irregularly-shaped ball. It is called a "nut-gall," and is found principally on a small oak, a native of the southern and central parts of Europe. All these oak-apples and nut-galls are of importance, but the latter more especially, and they form an important article of commerce. A substance called "gallic acid" resides in the oak; and when the puncture is made by the cynips, it flows in great abundance to the wound. Gallic acid is one of the ingredients used in dyeing stuffs and cloths, and therefore the supply yielded by the nut-gall is highly welcome. The nut-galls are carefully collected from the small oak on which they are found, the Pyreneean oak. It is easily known by the dense covering of down on the young leaves, that appear some weeks later than the leaves of the common oak. The galls are pounded and boiled, and into the infusion thus made the stuffs about to be dyed are dipped,'"