2 BULLETIN 1225, U. S. DEPARTMENT OF AGRICULTURE. 
Many obstacles to the production of camphor in commercial quan- 
tities at a reasonable price were soon encountered, the most serious 
of which was the injurious effect on the trees of the usual method of 
pruning or harvesting the branches. The practice was to cut the 
Fig. 1.— Camphor tree showing characteristic habit of growth. 
branches from the top and sides of the tree each year, the cuts being 
made without regard to the nodes. In many instances this left from 
1 to 12 inches of the branch extending beyond the node. Since 
camphor trees, except in rare cases, do not put out new branches 
