Influence of Size and Portion of Cone on Seed Weight In Eastern White Pine

equal portions--apical, middle, and basal. The seeds were separately extracted and weighed for each of the 54 tree-length-portion cone classes. Empty seeds were blown out in an upward moving air stream. Two sets of weighings were obtained for each of the 54 lots of seed. In the first set, 10 groups of 50 seeds each were weighed to an accuracy of 0.2 rag. on an analytical balance. These group weighings are the basis of Table 1. In the second set, which furnish the basis for Tables 2 and 3, 50 seeds were weighed individually to an accuracy of 0.02 mg. on a torsion balance.