16 FOREST CULTURE AND 
But I have, on this occasion, dwelt already long 
enough on the stern necessity of securing a due rela- 
tion of forest to territory, of woods to climate, of tim- 
ber to industries. These great questions have been 
discussed, by able men, through time long passed, in 
all countries of civilization. The details, moreover, 
of such discussions demand a special and fuller teach- 
ing, for which, perhaps, opportunities may yet arise 
in this hall. But to those who wish early to devote 
fuller attention to vital considerations of this kind, I 
would recommend the perusal of the admirable work 
of George P. Marsh (Man and Nature; or Physical 
Geography, as modified by Human Action. London: 
1864). That author studied the scattered and largely 
foreign literature pertaining to this subject with sin- 
gular care, observed very many original facts, and 
argued on them with great ability. A smaller, still 
more recent publication (Disastrous Effects of the De- 
struction of Forest Trees in Wisconsin, by Lapham, 
Knapp, and Crocker, published in 1867) is also de- 
serving full attention, inasmuch as it brings before us 
the difficulties and losses which the destruction of the 
forests has already caused in one of the younger of the 
American States ; while, again, Indian experiences 
in regard to forests may be traced in the valuable vol- 
ume issued by Dr. Cleghorn (Forests of the Punjab and 
Western Himalaya ; Roor Kee, 1864). Some observa- 
tions of my own, applying to countries like North Af- 
rica, have been recorded two years ago in the Bulle. 
tin de la Societe d’ Agriculture d’ Alger. 
One of the main objects, however, of my address 
this evening, is to show in what manner a well-or- 
ganized and yet inexpensive system of forest admin- 
