. Bulletin (Pennsylvania Department of Forests and Waters), no. 38-39. Forests and forestry. A Big Ailanthiis at York Springs, Pennsylvania. FOREWORD Almost 150 years ago the ailanthiis tree was brought to America. The first tree was planted in 1784 by William Hamilton in his garden called "The Woodlands," now known as ''The Woodland Cemetery" bordering the campus of the University of Pennsylvania in Philadel- phia. At first this interesting tree immigrant w^as planted exclusively as an ornamental tree. From the day of its first introduction the climate, the soil, and other grow
. Bulletin (Pennsylvania Department of Forests and Waters), no. 38-39. Forests and forestry. A Big Ailanthiis at York Springs, Pennsylvania. FOREWORD Almost 150 years ago the ailanthiis tree was brought to America. The first tree was planted in 1784 by William Hamilton in his garden called "The Woodlands," now known as ''The Woodland Cemetery" bordering the campus of the University of Pennsylvania in Philadel- phia. At first this interesting tree immigrant w^as planted exclusively as an ornamental tree. From the day of its first introduction the climate, the soil, and other growth factors, favored it. It was not long until specimen trees were growing in most of the southeastern counties of Pennsylvania. Later it w^as planted in western Pennsylvania, and now it is found in practically all parts of the State, but is not common in the highlands. While man was a big factor in distributing the ailanthus through- out Pennsylvania, the tree itself has contributed much to the exten- sion of its range. As soon as the trees planted in the early days reached maturity, they began to broadcast seeds far and wide. As a result of this w^de seed distribution, trees began to spring up on a wide range of situations. The ailanthus situation in Pennsylvania is serious. It is the only introduced tree that is competing vigorously with our native tree growth, and in this competition it appears to have a marked advan- tage. Unless a use is found for its wood, this tree will develop into a worthless forest weed and become a forest nuisance of the first magnitude. To check its growth is a difficult problem. It is far more practical to find a use for its wood than to attempt to control this ultra-aggressive tree. A general study of its wood characteristics suggested that it might be used in the manufacture of woodpulp. To determine the merits of this suggestion, a cooperative experiment was undertaken several years ago by the Pennsylvania Department of Forests and Waters and th
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