The grid system of permanent circular 1/4 acre sample plots established in 1939 and 1940 by the Passamaquoddy Land Company will form the basis for the spruce budworm study in Talmadge Township. This grid system consists of parallel cruise lines spaced for the most part a half a mile apart and running in an east-west direction across the town. The cruise lines in turn are tied to 3 base lines traversing the town in a north-south direction. As a further means of locating the plots, an effort in most cases was made to scribe line trees at points where cruise lines crossed existing roads. The circular 1/4 acre sample plots are spread at 1/2 mile intervals along the cruise lines.