Oak apple due to the superficial resemblance and the preponderance of the oak marble gall in the wild. Other galls found on oak trees include the oak artichoke gall and the acorn cup gall, but each of these has its own distinctive form. Some common oak-apple-forming species are the "Biorhiza pallida" gall wasp in Europe, "Amphibolips confluenta" in eastern North America, and "Atrusca bella" in western North America. Oak apples may be brownish, yellowish, greenish, pinkish, or reddish. Oak galls have been used in the production of ink since at least the time of the Roman Empire. From the Middle Ages to
Oak Lane Day School by the Department of Public Instruction of the Commonwealth of Pennsylvania. In 1929, funds provided by Mr. and Mrs. Leopold Stokowski, world-renowned orchestra conductor and Oak Lane parents, allowed the construction of a nursery school wing. Architects George Howe and William Lescaze were hired for this building project, which was the first of many under their new firm. Its "International Style" attracted worldwide acclaim. Many building concepts appropriate to young children were incorporated in its plans, such as smaller doorways and steps, cork flooring, special furniture and protected outdoor areas. During the Depression, Oak Lane began to experience financial difficulties