For convenience and brevity in the field, symbols representing 

 the various types, diameter classes, moth infestations, etc., were 

 used. These symbols are somewhat similar to those used in the 

 previous survey. The map work of each town has been com- 

 pleted, and photographic enlargements of the topographical 

 maps used as a base are to be found at the office of the State 

 Forester. These maps show the strip lines which were run in 

 each town, and contain a symbolic explanation of the different 

 types, size classes, etc. Tables containing summaries computed 

 from the information obtained from the field work are. contained 

 in this bulletin. 



The following diagram may serve to illustrate the method 

 used in making this survey: - 



Map of northern section of Rockland, showing method of survey. 



Lines 1, 2, 3 and 4, running approximately east and west, 

 represent strip lines one-half mile apart. On Line 1, and near 

 the top of the plate, are the symbols "E S 5, 1600V Consult- 

 ing the legend we learn that along this line for a distance of 





