380 JOURNAL OF FORESTRY 



From the above comparison, we can see that the intensively 

 thinned Plot No. 1 has a much better development than that shown 

 in the yield table for a stand of approximately the same age. Plot 

 No. 1 has thirty-eight more trees to the acre than the yield table with 

 a basal area 34.9 square feet larger. The average diameter is .5 of 

 an inch larger and the average height 11.4 feet greater for trees on 

 the plot. The yield, too, shows Plot No. 1 to be much better, being 

 1,839.3 cubic feet greater for the plot. This excess is exclusive of 

 all thinnings. 



The other plots less frequently thinned are poorer than the yield 

 table in some respects and better in others. In the matter of both 

 current and mean annual growth the plots all excel the yield table. 



The figures all point to the advisability of thinning early and often, 

 in accordance with textbook instruction. This should hold for this 

 country, where the tree is native, as well as in Europe. The figures 

 serve as an indication of what can be done in this country when eco- 

 nomic conditions permit. 



Den Gronne Douglasies vaekst i Danmark. Det Forstlige Forsogsvaesen i Dan- 

 mark, 1912. Vol. 4, No. 1. 



The State of California has drawn up a set 

 Logging and of logging and sawmill safety orders which go 



Sawmill into effect March 15, 1917. 



Safety Orders The orders covering logging work have al- 



ready been issued and contain provisions for the 

 inspection of donkey boilers and engines, a uniform set of donkey 

 engine signals, specifications in regard to management of lines and 

 blocks, location of log landing with reference to loading railroad 

 donkeys, and standard specifications for logging railroad track and 

 logging car equipment. 



The rules as laid down should reduce the hazard of personal 

 injury on logging works, which has been greater than in some other 

 industries. 



West Coast Lumberman, Feb. 15, 1917. 



