statistical Notes. 185 



Owing to these high prices the gross yield of some 

 Swiss forests is the largest known in Eiirope, the city 

 forest of Zurich exhibiting yields of $13.00 and the city 

 forest of Aarau as much as $14 per acre on the average, 

 although in the Alps forests the gross yield sinks to $3 

 and $4. The more intensively managed city forests 

 mentioned spend on their management $6 and even $7 

 per acre, while most of the State forests keep their 

 expenditures within $3.50 to $3.50, and in some places 

 down to $1.50 per acre. The net yields vary therefore 

 for the State and communal forests of the plateau coun- 

 try between $3 and $6.50 for some of the city forests 

 from $6.50 to $8 and $9. 



Switzerland has long ago ceased to produce its wood 

 requirements and imports from 6 to 8 million dollars 

 annuallv of wood and wood manufactures. 



