THE ROTS OF WESTERN WHITE PINE. 5 
type in northern Idaho and western Montana during the field season 
of 1916 were secured. With this information plans were outlined 
and arrangements made to secure data on as many of the areas as 
were necessary in order to comply with the outline previously given. 
Thanks are due to the officers of the Cceur d'Alene National Forest 
for their helpful cooperation throughout the season. 
In all, seven separate sale areas and one private cutting were 
covered in the study, and data were secured from each. The Lind- 
berg, Honeysuckle, and Cathcart chances, or sale areas, are located 
within the drainage of the Little North Fork River. The Tent, 
Silver, and Boro Creeks sale areas are located in the drainage of the 
main Cceur d'Alene River, near Nelson, Idaho. The Bennett-Miner 
chance is located on the slopes adjacent to the North Fork of the 
Cceur d'Alene River, 20 miles above Prichard, Idaho. The private 
cutting is located near Priest River, Idaho, and is on the Humbird 
Lumber Company's land. All of the sale areas, with the exception 
of the private cutting on the Priest River, are located within the 
general drainage of the Cceur d'Alene River in the Cceur d'Alene 
National Forest of Idaho. All the areas studied are typical of the 
western white-pine type of forest. 
Data were secured on the trees soon after the trees had been 
felled and before any of the logs had been removed by the skidding 
teams. In this manner it was possible to obtain data on a large 
number of trees each day. The entire tree was always available, and 
references to all the trees cut on that portion of the sale area included 
within the study were covered by the data. No selection of in- 
dividual trees or groups of trees was practiced, the aim being to 
record accurate information on the general run of the stand according 
to age class and site. The sawing of the trees into standard log 
lengths of 8, 12, 14, and 16 feet by the logging crews offered splendid 
opportunities to obtain the rot dimensions and other data. The in- 
fected culled logs of merchantable size were opened up sufficiently 
to disclose the rotted area. The top portions of the tree beyond the 
merchantable limit were cut open by the data crew to determine the 
exact extent of the rot in cases where the rot ran into the top. 
Cooperation with the logging contractors and foremen aided greatly 
in keeping ahead of the skidding teams. 
For data on the younger age classes not found on the sale areas, 
special permission was obtained to cut certain small areas of the 
younger trees on adjacent areas. 
The trees on both the sale areas and the young age-class plats were 
numbered consecutively as they were measured and recorded, the 
number being placed on the stump, so that no duplication of trees 
occurred. Similar extensive and intensive data were obtained for 
