JOURNAL OF FORESTRY, XV, NO. 



PLATE II 



Fig. 1. — This bed was steamed for -45 minutes. A temperature of 97° C. was 

 secured at 3 inches below the surface and 94° C. at 8 inches below the surface. 

 The seedlings in the foreground in section No. 1 are jack pine, average stand 

 being 200 seedlings per square foot. Those in section 2 are Norway spruce; 

 average stand per square foot, 2M%. Those in section 3 are Black Hills 

 spruce; average stand per square foot, 84. Those in section 4 are Austrian 

 pine; average stand per square foot, 122. Those in section 5 are western 

 yellow pine; average stand per square foot, 101. 



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J. 



Fig. 2. — The bed contains natural soil. Neither the seedbed soil nor the sand 

 covering the seed was sterilized. The seedlings in the foreground in section 

 1 are: Jack pine, average number per square foot, 45 J^; in section 2, Norway 

 spruce, 52 1/5 per square foot; in section 3, Black Hills spruce seedlings, all 

 damped-off ; in section 4, Austrian pine, 6 seedlings per square foot; in section 

 5, yellow pine, 173^ per square foot. 



