66. — Clear cutting in Douglas fir with seed-tree groups 

 left uncut to seed the intervening areas. 



67. — Logging practices of the Simpson Logging Co. on 

 the Olympic Peninsula in Washington are shown: A, Sat- 

 sop River operations. This area was logged by clear- 

 cutting methods approximately 35 years ago. It is now: 

 fully stocked with natural reproduction up to 30 years 

 old, mainly Douglas fir. B, Selective logging of a 300- 

 year-old Douglas fir decadent stand. All hemlock has 

 been left. C, Camp 3 operations showing staggered set- 

 tings in background, seed trees and groups of young 

 growth in middleground. Age of timber 250 years. 



68. — The Weyerhaeuser Timber Co., Longvieiv, Wash. 

 A, In the background of Me picture is a 40-acre perma- 

 nent seed area. Across ihe railroad grade to the right 

 are four additional seed areas of from 2 to 5 acres. In 

 the center of the large cut-over area is a setting of mature 

 timber ichich has stood 2 years since the surrounding area 

 was logged. This is now being logged with crawler trac- 

 tors. About 25 percent of the trees will be left to provide 

 a permanent seed supply for the area around it. B, Fine 

 stand of 15-year-old Douglas fir resulting from natural 

 reforestation. 



69. — A, The Croun Zellerbach Corporation selectively 

 logged this land in the Clatskamie area, Washington, with 

 tractors about 1933. All large Douglas fir and Sitka 

 spruce was removed, leaving all western red cedar, ivest- 

 ern hemlock, and small Douglas fir. The cut totaled 

 25,000 to 30,000 board feet per acre, averaging approxi- 

 mately 35 to 40 percent of the total net volume. B, Tract 

 in the Siltcoos Lake area, Oregon, selectively logged itith 

 tractors about 1933. Approximately 30,000 board feet, or 

 35 percent, was removed. 



70. — Residual stand on pine lands cut over by the Cali- 

 fornia Diamond Match Co. in 1938. 



71. — Operation in Lassen County, Calif., by the Fruit 

 Groivers Supply Co. Logged over in 1929. 



72. — Selective redwood logging with tractors on the Van 

 Duzen River, Humboldt County, Calif., by the Hammond 

 Redwood Co. A cut of about 100,000 board feet per acre 

 was made, leaving about 60,000 board feet per acre. 



73. — Selective logging in the redwoods, Mendocino 

 County, Calif., by the Mendocino Lumber Co. A cut of 

 about 40,000 board feet tvas made, leaving about 15,000 

 to 20,000 board feet per acre. 



