102 TIMBER AND TIMBER TREES. (cuap. xvii. 
Passing now from Europe to America, it will be well 
to describe three or four of the most valuable kinds of 
Oak which have been dealt with commercially and em- 
ployed in this country. There are many others, spread 
over that vast continent; but, as they are little known 
here and not likely to be required, they will be only 
briefly noticed. 
