Forest Mensuration of the White Pine, a booklet contain ing most Of the data on the White pine included in this bulletin. A second edition was published in 1911, and as that is now exhausted a third edition seems necessary. Since the original investigation of the white pine was made the Department has also collected similar data on other species, and the Depart ment Of Forestry at Harvard University has in its research work published a large amount of information along similar lines. It seemed to the Commissioner of Conservation that these tables, many of which are very valuable and interesting to the forest owner, should be made available for use Of the general public by including them with the original material. Director R. T. Fisher of the Harvard Forest has very graciously accepted this suggestion, and has turned his material over to us for use in this bulletin. TO Mr. H. 0. Cook, m.f., the author of the original bulletin on White pine mensuration, has been assigned the task Of compiling and editing the present publication.