Alp Lusgen, September 4, 1882

* * * * *

The German empire has now about 34,000,000 acres of

forest, valued at $400,000,000, and appropriates $500,000

even year to increase and maintain the growth of trees.

* * * * *

Scientific American Supplement, No. 365, December 30, 1882 · 第 37 / 48 题